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Prof. Lee Bernstein (UC Berkeley/LBNL)18/05/2026, 09:20Oral
The short range of the nuclear force has often been used by nuclear physicists to justify ignoring most of the influence of a high energy density plasma (HEDP) environment on neutron induced nuclear reaction dynamics. However, the recent achievement of Lawson’s criterion [1] and the achievement of target gain >1 at the National Ignition Facility (NIF) [2] has for the first time created a...
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Paraskevi Dimitriou (International Atomic Energy Agency)18/05/2026, 09:50Oral
Nuclear level densities (NLD) and photon strength functions (PSF) are essential input parameters for theoretical calculations and evaluations of nuclear reaction data for basic science and a wide range of nuclear applications.
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The IAEA Reference Input Parameter Library (RIPL), released in 2009 [1], provided reliable level‑density and photon‑strength‑function models and recommended values... -
Mathis Wiedeking (Lawrence Berkeley National Laboratory)18/05/2026, 10:20Oral
Experiments were performed at the Berkeley Lab Laser Accelerator (BELLA) facility, where $^{81}$Br targets were irradiated using 15 MeV electron beams. The associated bremsstrahlung radiation served as a control for the measurements. The experiments were conducted under a range of spatially and temporally focused and defocused beam conditions, enabling a systematic investigation of their...
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Milan Krticka (Charles University, Prague)18/05/2026, 10:40Oral
Average resonance parameters, particularly the average resonance spacing, derived from experimental neutron-resonance data are essential for many nuclear-physics applications, including testing level-density models and normalizing experimental results. Two widely used compilations are the IAEA RIPL-3 database [1] and Said Mughabghab’s Atlas of Neutron Resonances (latest edition 2018) [2]....
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Stephane Goriely18/05/2026, 11:30Oral
Reliable theoretical predictions of nuclear dipole excitations and level densities in the whole nuclear chart are of great interest for different applications, including in particular nuclear astrophysics. We present here our latest calculations of the de-excitation E1 and M1 photon strength functions obtained in the framework of the axially-symmetric deformed quasiparticle random phase...
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Toma Hori (RCNP)18/05/2026, 12:00
In recent years, advances in laser technology have enabled focused intensities on targets to reach up to 10^22~W/cm^2.Within the plasma formed on the target by the laser, ultra-high-density electromagnetic field is generated. High-energy electrons and ions with energies of several tens of MeV have been observed from such laser plasmas, suggesting the possibility that nuclear reactions are...
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Henrik Døvle Andrews (University of Oslo)18/05/2026, 12:20Oral
Nuclear level densities (NLDs) and $\gamma$-ray strength functions (GSFs) provide key inputs to Hauser-Feshbach calculations and therefore influence reaction rate predictions used in nucleosynthesis modelling and applied studies. Previous Oslo method and complementary measurements in the palladium and cadmium mass region have highlighted characteristic features of the dipole response,...
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Stephanie Lyons (Pacific Northwest National Laboratory)18/05/2026, 12:40Oral
Nuclear level densities (NLD) and gamma strength functions (gSF) are key parameters used to calculate neutron-capture cross sections where experimental data does not exist. Current Hauser-Feshbach calculations allow for the use of a variety of models for NLD and gSF, ranging from phenomenological to microscopic. Using published experimental data, as well as Hauser-Feshbach calculations...
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Mhlangano Freedom Nkalanga (University of Johannesburg)18/05/2026, 14:30Oral
We present the first implementation of the Shape method in inverse kinematics. Traditionally, the Shape method relies on identifiable diagonals in the first generation matrix to extract the shape of the gamma-ray strength function. Our results show that the method works even if no clear diagonals are not identified. We also applied for the first time the Shape method to extract the gamma-ray...
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Manu Kanerva (University of Jyväskylä)18/05/2026, 14:50Oral
Reflection-symmetry-breaking nuclear octupole deformation is a phenomenon of significant interest due to its connection with fundamental symmetry considerations ($\mathcal{C}$, $\mathcal{P}$, and $\mathcal{T}$) and its relevance in nuclear structure studies. Substantial experimental evidence indicates that a few nuclei exhibit a pear-like octupole deformation [1], whereas global theoretical...
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Peter von Neumann-Cosel18/05/2026, 15:10Oral
Oslo method and neutron-capture $\gamma$ decay experimenents on heavy deformed nuclei systematically show a resonance-like structure around 2 - 3 MeV in the gamma strength function (GSF) interpreted as the scissors mode in the quasicontinuum. Its $M1$ character has been demonstrated by polarization experiments [1] and its strength may be connected to the low-energy enhancement phenomeon in...
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18/05/2026, 15:30Oral
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Kiriaki Prifti (IKP, TU Darmstadt)18/05/2026, 16:30Poster
The first temperature-dependent relative self-absorption (TRSA) measurement was conducted at the Darmstadt High-Intensity Photon Setup (DHIPS) at the superconducting Darmstadt linear electron accelerator (S-DALINAC) on the nucleus $^{27}$Al using a bremsstrahlung photon beam with an endpoint energy of 5.5 MeV. This technique enables the separation of the natural linewidth of the nuclear...
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Henrik Haug18/05/2026, 16:30Poster
In nuclear fission, a heavy nucleus splits and the fission fragments emerge spinning [2]. The isomeric yield ratio (IYR) i.e. the population frequency of an isomer, is know to be sensitive to the angular momentum of the fragment. Measuring the IYR can therefore give information about the initial sate of the fission fragments.
This work uses a technique to reach short lived isomeric states...
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Lauren Bell (University of Oslo)18/05/2026, 16:30Poster
he Nuclear Level Density (NLD) and Gamma-ray strength function (GSF) are important quantities to study as they are inputs into the Hauser-Fesbach statistical model calculations which are used to predict reaction cross-sections. Once experimentally measured they can be used as inputs in codes such as TALYS [1] to calculate/constrain the $(n,\gamma)$ cross-sections. Thus, it is important to...
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Oskar Ekeid Idland (Department of Physics, University of Oslo)18/05/2026, 16:30Poster
Targeted alpha therapy is a new modality of cancer treatment in which alpha-emitters are used to precisely target cancer cells; however the short range of alpha particles makes assessing the actual dose of radiation delivered to the cell challenging. PSMA-targeted $^{212}$Pb radionuclides have previously been clinically investigated for prostate cancer cell lines C4-2, PC3-PIP and PC3-Flu....
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Josef A. H. Hisanawi (Department of Physics, University of Oslo)18/05/2026, 16:30Poster
This study computationally evaluates a hybrid nuclear fuel cycle in which partially depleted fuel pebbles from a compact maritime Fluoride-salt-cooled High-temperature Reactor (FHR) are transferred to a larger terrestrial FHR for continued utilization. Neutronic behavior is analyzed using a high-fidelity Monte Carlo framework: the Hyper-Fidelity (HxF) tool models detailed depletion in the...
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Hannah Ekeberg (University of Oslo)18/05/2026, 16:30Poster
Radionuclides that decay with Meitner-Auger electrons are believed to have potential in targeted radionuclide therapy, due to their short ranges on the scale of the cellular nucleus with high precision dose delivery. To establish production routes, accurate nuclear data for optimization of irradiation and yield predictions are required. The Meitner-Auger emitter $^{193m}$Pt is of interest due...
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Gulla Torvund (University of Oslo)18/05/2026, 16:30Poster
In this gamma spectroscopy analysis, we aim to measure the spectroscopic quadrupole moments of excited states and electromagnetic transition rates in neutron-deficient 140Sm. The experimental data was collected during a Coulomb excitation experiment at ISOLDE in 2017, utilizing a 140Sm beam on a 208Pb target and the Miniball HPGe array alongside a CD particle detector.
The chain of samarium...
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Elise Malmer Martinsen (Univeristy of Oslo)18/05/2026, 16:30Poster
I will present my results from my work with Sr-82 that was conducted at LBNL fall 2025. Strontium 82 was produced, chemically separated and injected into mice. The biodistribution of Sr-82 was then measure both using PET scans and collection and gamma counting of organs after the end of the experiment. On the PET scans we can see a clear accumulation in the skeleton and head region, however...
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Retief Neveling (iThemba LABS, South Africa)18/05/2026, 16:30Poster
The low-energy nuclear astrophysics beamline at the iThemba LABS 3-MV Tandetron facility enables the study of radiative capture reactions using proton and alpha beams. The setup can presently be instrumented with either up to twelve 3″×3″ LaBr₃:Ce detectors or six HPGe detectors (with associated BGO Compton-suppression shields), or with a combination of both detector types. To date, proton...
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Baltasar Johannes Hemmerle (Department of Oslo, University of Oslo)18/05/2026, 16:30Poster
Heat-Pipe cooled Reactors (HPRs), which were originally intended for space applications, are of particular interest for remote/autonomous operations as their designs are simple, compact, and transportable. Historically most HPR designs produce only limited thermal power in the kilowatt range and/or utilize highly enriched fuel. This work investigated how reactor design principles can be used...
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Maia Wirgenes (University of Oslo and the Institute of Energy Technology)18/05/2026, 16:30Poster
Reliable fission yield data are essential input for reactor depletion simulations, decay heat predictions, and fuel cycle assessments. The high accuracy of these data is particularly important for decommissioning-related analyzes involving the characterization and subsequent handling procedures of irradiated materials. The statistical description of fission fragment de-excitation is based...
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Dr Kgashane Malatji (University of California Berkeley), Thibault Laplace (University of California, Berkeley)18/05/2026, 16:30Oral
The Photon Strength Function (PSF) database hosted by the IAEA [1,2] provides both experimental data and theoretical calculations. Experimental PSF data extracted using the Oslo method were compared to two theoretical models recommended on the IAEA database website. One model is purely phenomenological (SMLO) while the other is based on microscopic calculations (D1M-QRPA).
For all the...
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Amadie Wijenarayana (Ohio University)18/05/2026, 16:30Poster
The overall goal of nuclear astrophysics is to understand the creation of the elements in the universe and the nucleosynthesis processes that are involved. Nuclear Level Densities (NLD) are used as inputs to calculate reaction rates for nuclear reactions that occur in different stellar environments. NLDs represent the number of excited energy levels present in a nucleus at a specific...
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Vala Valsdottir (University of Oslo)18/05/2026, 16:30Poster
Between the 1960s and early 1980s, the United States undertook the world’s largest nuclear power construction program. Early projects benefited from declining construction costs, making nuclear power economically competitive with fossil alternatives. From the early 1970s and onward, however, overnight construction costs (OCC) escalated rapidly, coinciding with regulatory tightening, high...
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Azusa Inoue18/05/2026, 16:30Poster
In this poster, we present the results of our previous experimental study and discuss a future theoretical approach. The aim of our research is to achieve a comprehensive understanding of the Big Bang Nucleosynthesis (BBN) process and to potentially resolve the Cosmological Lithium Problem (CLP). The CLP is a well-known issue in astrophysics, referring to the overestimation of the primordial...
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Marius Torsvoll (University of Oslo)18/05/2026, 16:30Poster
In this work we present our work investigating the super assymetric fission mode in $^{233}$U with the LOHENGRIN mass recoil spectrometer. In this poster we will report on preliminary results and the effort made during the experimental campaign conducted in June 2025 and in April 2026.
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Sean Liddick (FRIB/MSU)19/05/2026, 09:00Oral
The photon strength function (γSF) defines the likelihood of photon emission as a function of photon energy and the properties of the initial and final nuclear states. Of the features present in the γSF, an enhancement in the low-energy region has been observed in some nuclei. Despite two decades of research, the electromagnetic nature of this enhancement remains an open question. This low...
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Dr Kgashane Malatji (University of California Berkeley)19/05/2026, 09:30
The electromagnetic dipole response of atomic nuclei is fundamental for understanding nuclear structure and reaction dynamics. Measurements of photon strength functions (PSFs) have revealed phenomena such as Low-Energy Enhancement, significantly affecting astrophysical reaction rates relevant to nucleosynthesis.
To investigate the shape of the PSF and the observed excitation modes below...
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Adriana Sweet (Lawrence Livermore National Laboratory)19/05/2026, 10:20Oral
The upcoming operation of the nuCARIBU facility at ATLAS will enable new measurements of neutron rich La isotopes, which are important both for U.S. stockpile stewardship applications and for understanding the nucleosynthesis of heavy elements in the cosmos. In particular, constraining the $ ^{146} $La(n,$ \gamma $)$ ^{147} $La and $ ^{147} $La(n,$ \gamma $)$ ^{148} $La reactions through...
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Dennis Muecher (Institute for Nuclear Physics, University of Cologne)19/05/2026, 10:40Oral
The $^{95}$Zr(n,$\gamma$) cross section is crucial for understanding the intermediate neutron capture process (i process), as it directly affects the production and abundance of Molybdenum isotopes. The observed Molybdenum overabundance in presolar grains represents one of the most significant signatures of i-process nucleosynthesis. At the same time, $^{95}$Zr remains a branching point in the...
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Alexander Voinov (Ohio University)19/05/2026, 11:30
In this work, new results from a series of particle-evaporation experiments on nuclei spanning a wide mass range, including the fission-product region, are presented. The measurements include energy spectra of emitted neutrons and charged particles obtained over a range of excitation energies.
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The experimental data are compared with statistical-model calculations performed with commonly used... -
Pepijn Demol (Université Libre de Bruxelles)19/05/2026, 12:00Oral
Understanding the structure of heavy and neutron-rich nuclei is essential for the rapid neutron-capture process (r-process). The simulation of this process, which synthesizes half of the elements heavier than iron, relies on accurate predictions of nuclear masses and reaction rates (neutron capture, photo absorption, beta decay, etc.) for thousands of neutron-rich nuclei. However, since...
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Teodora Sebe19/05/2026, 12:20
This study aims at understanding the dependence of the E1 strength in the transition region from vibrational to rotational nuclei. Below the Z = 50 closed shell Sn nuclei, week deformations start to build in. In the case of 106Pd, the observed band structures were reported to correspond to a quadrupole deformation of β2 = 0.175 [1], where calculations within the tilted-axis cranking model [2]...
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Andrea Horvat (RBI Zagreb)19/05/2026, 12:40Oral
Exploring the equation of state (EoS) of isospin-asymmetric nuclear matter is essential for understanding the structure of exotic nuclei and processes in neutron-rich astrophysical environments. The symmetry energy, which encodes the isospin dependence of the EoS, is commonly characterized by its value at saturation $J$ and its slope $L$, the latter of which remains poorly constrained. In this...
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Sivahami Uthayakumaar (Michigan State University / FRIB)19/05/2026, 14:30Oral
How elements beyond Fe are produced in stars continues to be an open question in nuclear astrophysics. Traditionally, two main pathways along the neutron-rich side of the chart of nuclides were shown to explain heavy element nucleosynthesis: the slow (s-) and rapid (r-) neutron capture processes. However, in recent astronomical observations, especially in Carbon-Enhanced Metal Poor (CEMP)...
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Johann Isaak19/05/2026, 15:00Oral
Nuclear level densities (NLDs) are fundamental for describing statistical properties of atomic nuclei and play a central role in nuclear structure and reaction studies as well as in nucleosynthesis calculations.
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In this work, we present the determination of the NLDs for the even tin isotopes $^{116,118,120}$Sn. High-resolution nuclear spectra from $(d,p\gamma)$ reactions, measured with the... -
Justin Loring (University of Tennessee Knoxville)19/05/2026, 15:30Oral
In this work, we compare the performance of three well-known phenomenological nuclear level density models for cross-section evaluations in the unresolved resonance region. Phenomenological model parameters are optimized by using least-squares analysis to simultaneously fit level density, cross-section, neutron strength, and capture width data from the EXFOR and ENSDF databases. Calculations...
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Hannah Berg19/05/2026, 15:50Oral
In this talk we present the extracted nuclear level density, and $\gamma$-strength function for $^{133}$Xe using the inverse-Oslo method. These are the first statistical properties extracted below 6 MeV for any xenon isotope. The experiment was performed in inverse-kinematics at iThemba LABS with an annular particle telescope and a scintillator array consisting of LaBr$_3$ and BGO-shielded...
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Agnese Giaz (INFN - Sezione di Milano)20/05/2026, 09:00Oral
The experimental campaign carried out at the Krakow Cyclotron Centre Bronowice, aimed at determining the strength of the Pygmy Dipole Resonance (PDR) and the isoscalar Giant Quadrupole Resonance (IS-GQR), will be presented. Both studies were performed using the same experimental setup and based on inelastic proton scattering techniques. A series of measurements focusing on the PDR in stable...
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Kamila SIEJA20/05/2026, 09:30Oral
In this contribution, I will report on recent CI-SM results covering the large-scale evaluation of electric dipole PSF in light and mid-mass nuclei, their applications, as well as first calculations of isoscalar and isovector modes in neutron-rich nuclei, permitting a CI-SM insight into the isospin-mixing of the PDR. If time allows, I will also discuss recent progress of establishing an...
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Maria Markova (University of Oslo)20/05/2026, 10:00Oral
The pygmy dipole resonance (PDR) is commonly associated with an excess $E1$ strength on top of the low-energy tail of the giant dipole resonance (GDR) close to the neutron-separation energy in stable and unstable heavy nuclei. While its detailed structure, properties, and origin remain a matter of ongoing debates and research, the neutron-skin oscillation picture of this feature still prevails...
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Dr Tanmoy Ghosh (Dept. of Physics, Faculty of Science, University of Zagreb)20/05/2026, 10:20
Accurate neutron-capture and photodisintegration reaction rates within the Hauser-Feshbach statistical framework are strongly governed by the nuclear $\gamma$-ray strength function and the nuclear level density. Uncertainties in these key nuclear inputs propagate directly into Maxwellian-averaged cross sections and constitute one of the dominant sources of uncertainty in modeling the...
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Refilwe Molaeng (School of Physics, University of the Witwatersrand)20/05/2026, 10:40Oral
This work investigates the Pygmy Dipole Resonance (PDR) in the deformed $^{154}\mathrm{Sm}$ nucleus. The aim is to determine whether the PDR splits with respect to the K quantum number in a deformed nucleus, as is the case for the GDR. The study uses the $(\vec{\gamma},\vec{\gamma^\prime})$ reaction to excite dipole states at energies ranging from 3.5 MeV to 7.05 MeV, approaching the neutron...
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Andrea Richard20/05/2026, 11:30Oral
Neutron-capture cross sections play a vital role in our understanding of heavy element nucleosynthesis and applications relevant to nuclear security. Reaction networks in these regions involve short-lived isotopes for which capture cross sections cannot be measured via direct techniques. Instead reactions in these regions rely on calculations that can have uncertainties up to a few orders of...
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Prof. Shilun Jin (Institute of Modern Physics, Chinese Academy of Sciences)20/05/2026, 12:00Oral
60Fe, with its half-life of 2.6 My, is a great indicative isotope for recording the violent events in the cosmos. By measuring its abundances in the deep-sea sediment, lunar soil and the gammy-ray in space, scientists identified two accretion events (1.5–3.2) My and (6.5–8.7) My ago. These two events can be varying scenarios in the universe, like He- and C-burning shells inside massive stars,...
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Sebenzile Magagula (School of Physics, University of the Witwatersrand,)20/05/2026, 12:20Oral
Almost all elements heavier than iron are primarily produced through
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the slow s- and rapid r- neutron-capture processes, which contribute about 50% each to the observed abundances [1]. The s-process, branching-point nuclei such as 192Ir play a crucial role, as neutron capture competes with β-decay affecting nucleosynthesis.
In this study, the $^{192}\mathrm{Ir}(n,\gamma)^{193}Ir$ and... -
Kamila Horčičková (Charles University)20/05/2026, 12:40Oral
Radiative neutron capture on rare-earth nuclei is important for applications ranging from nuclear astrophysics to reactor-related environments, yet experimental data remain limited, particularly for odd–odd systems. In our work [1], we present new results on the $^{169}$Tm$(n,\gamma)$ reaction, including an experimental determination of the capture cross section in the presence of considerable...
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Dallas DeMartini (Yale University / Brookhaven National Laboratory)20/05/2026, 14:30Oral
Actinides are of great interest in astrophysics and in technology applications since
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they can fission. However, the microscopic calculation of their statistical properties
presents a major theoretical challenge. The configuration-interaction (CI) shell-
model is a suitable framework to calculate these properties but the required model
spaces are much too large for conventional... -
Luna Pellegri (University of the Witwatersrand)20/05/2026, 14:50Oral
The electric-dipole (E1) strength plays a central role in understanding photoabsorption reactions, offering insights into nuclear structure, collective excitations, and the nuclear response to external fields. While E1 strength has been extensively investigated in heavy nuclei (A > 90)—where shell effects and nucleon correlations are less pronounced—the situation is more complex for lighter...
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Marc Heumüller (Institut für Kernphysik, TU Darmstadt)20/05/2026, 15:20Oral
The giant dipole resonance (GDR) represents one of the most fundamental nuclear excitations and dominates the photoresponse of virtually all nuclei. Its geometrical viewing is an isovector oscillation of the proton against the neutron body. This model also provides predictions for the $\gamma$-decay behavior of the GDR in elastic photon and $2^+_1$ Raman scattering reactions.
To rigorously...
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Yusuke Irie (The University of Osaka)20/05/2026, 15:40Oral
The PANDORA experiment, conducted in October last year in RCNP, delves into photo-nuclear reactions within the mass region below A ∼ 56. This project aims to unravel the energy loss process of ultra-high-energy cosmic rays (UHECRs) during inter-galactic propagation. The origin, acceleration mechanism, and composition of UHECRs remain mysteries. Nonetheless, cosmic-ray air-shower observatories...
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Oliver Gorton (Lawrence Livermore National Laboratory)21/05/2026, 09:00Oral
Radiative strength functions (RSFs) model the bulk electromagnetic response of highly-excited nuclei and are critical inputs for statistical reaction codes. In this talk, I present a definition of the RSF that is consistent with Hauser-Feshbach reaction codes and that can be efficiently computed with the shell model by taking advantage of the energy-localized Brink-Axel hypothesis.
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Iris Dillmann21/05/2026, 09:30Oral
Neutron capture reactions are fundamental to understanding the synthesis of elements heavier than iron in stellar environments, occurring through the slow (s), intermediate (i), and rapid (r) neutron‑capture processes. While neutron‑capture cross sections along the valley of stability—particularly for stable or long‑lived isotopes—have been extensively studied, direct measurements on...
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yuan tian (China institute of atomic energy)21/05/2026, 10:00Oral
Nuclear level densities (NLDs) and the giant dipole resonance (GDR) encode complementary aspects of nuclear many-body dynamics and provide the microscopic structural input for compound-nucleus reactions. A consistent microscopic description of both quantities within a unified relativistic framework remains essential for understanding their structural origin and predictive power.
In this...
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Keenan Myers21/05/2026, 10:20Oral
A good understanding of Neutron-induced reactions on niobium are important for modeling radiation damage in superconducting magnets used in fusion energy systems and for interpreting archival radiochemical data for national security[1][2]. In order to constrain model parameters used in evaluation, correlated measurements of outgoing neutrons and gammas were collected using the Gamma Energy...
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Thanos Stamatopoulos (Los Alamos National Laboratory)21/05/2026, 11:10Oral
Th. Stamatopoulos, P. Koehler, A. Cooper, A. Couture, B. DiGiovine, T. Morrow, E. Renner, J. Svoboda
Los Alamos National Laboratory, 87545, NM, USA
With very few exceptions, direct measurements of neutron capture rates on radionuclides have not been possible. A number of indirect methods have been pursued such as the surrogate method [1], the γ-ray strength function method [2,3], the...
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Artemis Spyrou21/05/2026, 11:40Oral
Systematic measurements of the γ-ray strength function have shown a strong change of the low-energy enhancement (LEE) as a function of nuclear deformation. In an attempt to explore this behavior further, we performed a series of experimental studies in neutron-rich Zr isotopes, namely $^{97-100}\mathrm{Zr}$. These isotopes are in a region of abrupt deformation change from mostly spherical to...
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Neshad Deva Pathirana (Facility for Rare Isotope Beams - Michigan State University)21/05/2026, 12:00Oral
The extinct radionuclide $^{92}$Nb (half-life $\sim$ 34.7 Myr) is a sensitive tracer of proton-rich nucleosynthesis and a chronometer for the early Solar System. Interpretation of meteoritic $^{92}$Nb/$^{92}$Mo ratios is currently limited by both astrophysical and nuclear-physics uncertainties. In particular, the origin of $^{92}$Nb remains uncertain because it is shielded by the stable...
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C. Schmitt (Institut Pluridisciplinaire Hubert Curien, France; Institute of Nuclear Physics Polish Academy of Sciences)22/05/2026, 09:00Oral
As obvious from the intense experimental and theoretical work done over the past decades, and the still large amount of open questions, nuclear fission is a particularly complex process. A major reason for this is the interference of various aspects, from both reaction dynamics and nuclear structure, which determines the observables that can be measured in the laboratory. The last years showed...
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Stephane Hilaire (CEA, DAM, DIF)22/05/2026, 09:30Oral
Despite nearly 90 years since its discovery, the fission process remains a challenge for nuclear theories. Three main aspects have to be contemplated: the fission cross sections (probability that a fission occurs), the fission yields (distribution of the fragments resulting from the scission of the fissioning nucleus) and the fission fragments’ decay (responsible in particular of the prompt...
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Ali Al-Adili22/05/2026, 10:00Oral
This presentation provides an overview of recent experimental advances in nuclear fission research at the NNRC. We begin by summarizing key results from fission yield measurements performed at the Institut Laue Langevin, together with investigations of isomeric yield ratios obtained using the Nuball detector array. These studies contribute to a more detailed understanding of fragment mass...
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Speero Tannous22/05/2026, 10:20Oral
Improved measurements of $^{238}U(n,n'\gamma)$ cross-sections are needed to refine nuclear data evaluations used for fast reactors, stockpile stewardship, and nuclear astrophysics. The preliminary results of an experiment to measure neutron inelastic scattering on a natural uranium target will be presented. A 14 MeV deuteron beam was used to create a pulsed broad spectrum neutron beam via...
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Neeraj Kumar (Norwegian Nuclear Research Centre (NNRC), University of Oslo)22/05/2026, 10:40Oral
Nuclear fission remains one of the most complex processes in low-energy nuclear physics, with some open questions spanning both fundamental nuclear structure and applied nuclear technology. To address these challenges, the Oslo Cyclotron Laboratory (OCL) at the University of Oslo is establishing a dedicated fission research program that exploits its unique combination of light-ion beams and...
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Atsushi Tamii22/05/2026, 11:20
The study of photo-nuclear reactions is crucial for understanding nuclear structure and astrophysical processes. The PANDORA (Photo-Absorption of Nuclei and Decay Observation for Reactions in Astrophysics) project [1] aims to systematically investigate these reactions in stable nuclei with mass numbers below 60. We use virtual photon exchange through proton scattering at RCNP. The subsequent...
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Hershini Gadaria (Michigan State University)22/05/2026, 11:50Oral
The nucleosynthesis of approximately half of the elements heavier than iron is attributed to the r-process. A key input for modeling the r-process is the neutron-capture cross-section of neutron-rich nuclei. However, astrophysical sensitivity studies suggest that uncertainties in these cross-sections significantly impact the predicted abundances. In particular, in the A=140 region,...
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Jon Kristian Dahl (University of Oslo)22/05/2026, 12:10Oral
The low-energy enhancement (LEE) of the dipole γ-ray strength function has been observed in many nuclei, yet its microscopic origin remains debated. We investigate the LEE in $^{50}$V using large-scale shell-model calculations that treat electric and magnetic dipole transitions consistently within a single framework. Calculations are performed in a sd–pf–sdg valence space with a $1\hbar\omega$...
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Riccardo Maria Gesuè (Gran Sasso Science Institute, INFN LNGS)22/05/2026, 12:30Oral
Carbon burning is the third stage of stellar evolution, determining the fate of both massive stars and low-mass stars in binary systems.
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Only stars with a mass larger than a critical value M∗ up ∼ 10M⊙, can ignite Carbon in non-degenerate conditions and proceed to the next advanced burning stages up to the formation of a gravitationally unstable iron core.
Various final destinies are... -
Federica Ercolano (Università degli Studi di Napoli Federico II, INFN Sezione di Napoli)22/05/2026, 12:50Oral
The nuclear structure of $^{24}$Mg in the excitation energy region relevant to the $^{12}$C+$^{12}$C fusion reaction is crucial for constraining carbon-burning processes in massive stars. Although this reaction has been extensively studied over the past decades, significant uncertainties persist, particularly at center of mass energies below 2.5 MeV, where direct measurements are hindered by...
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Aaina Thapa (Lawrence Livermore national Laboratory)22/05/2026, 14:30Oral
The surrogate reaction method offers a powerful alternative to direct measurements of compound nuclear reaction cross sections but relies critically on theory developments for modeling the surrogate reaction used to populate the compound nucleus of interest. In this talk, I will present recent theoretical extensions for proton inelastic scattering and (d,p) surrogate reactions. This includes...
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16. The measurement of gamma-decay in photo-nuclear reaction on 12C、13C、27Al for the PANDORA projectYumaro Suzuki (RCNP, The University of Osaka)22/05/2026, 15:00Oral
Photo-nuclear reaction on light nuclei (A<60) is important to understand extragalactic propagation of cosmic-rays with energy greater than 1018 eV, but theoretical models of photo-nuclear reactions on these nuclei have been facing challenges due to lack of experimental data. PANDORA project aims at extracting these data such as photo-absorption cross section, E1 strength and branching ratios...
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Austin Rambo (Ohio University)22/05/2026, 15:20Oral
Measuring the $^{135}$Xe neutron-capture cross section ($^{135}$Xe($n,\gamma$)$^{136}$Xe) has been identified as a top priority for its role in reactor design, stockpile stewardship, nonproliferation, and astrophysics [1]. Current cross section data does not extend above thermal neutron energies and data evaluations differ by an order of magnitude. Performing direct neutron-capture...
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Andrew Voyles22/05/2026, 15:40Oral
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KONSTANTINOS BOSMPOTINIS (Michigan State University)Oral
There are 35 proton-rich stable isotopes, known as p-nuclei. Their existence is attributed to the p-process, primarily consisting of a network of photodisintegration reactions on s- and r-process seed nuclei. The abundances of p-nuclei can be obtained based on simulations of this network, with most of the isotopes involved being radioactive. For this reason, direct measurements of these...
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Claudia GriegOral
The nucleosynthesis of elements heavier than iron remains an open
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question in nuclear astrophysics. In the last decade, the intermediate (i)
neutron-capture process has attracted attention as a potential explanation
for observed abundance patterns in for example the old halo stars in our
Galaxy, that cannot be reproduced by the slow and rapid processes. Un-
derstanding the i-process... -
Lauren Bell (University of Oslo)Oral
Nuclear level densities (NLD) and $\gamma$-ray strength functions (GSF) are fundamental statistical properties that govern compound-nucleus decay and are essential inputs for reaction modeling in nuclear astrophysics and other applications. Within the Oslo method, these quantities are extracted from particle–$\gamma$ coincidence measurements and are, in principle, assumed to be independent of...
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Tshegofatso Modise (University of Botswana)Oral
Radiative proton capture is among the reaction mechanisms used for investigating nuclear structure in the quasi-continuum region. The nuclear level density (NLD) is high in the quasi-continuum region and the study of decays from individual states is not feasible. Instead, information on the decay is obtained through the statistical treatment of decay probabilities such as the photon strength...
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Rahul Jain (Lawrence Livermore National Laboratory)Oral
The $^{187}$Re/$^{187}$Os cosmochronometer is a nuclear dating technique used to determine the age of a galaxy and the onset of nucleosynthesis. It relies on the slow $\beta$-decay of $^{187}$Re into $^{187}$Os with a half-life of 41.2 Gyr. However, the precision of this technique depends on the accuracy of nucleosynthesis yields of these isotopes. $^{186}$Re is an unstable isotope with a...
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Fang-Qi Chen (Lanzhou University)Oral
The splitting of the scissors resonance in the actinide region is discussed within the framework of a microscopic model, in which the scissors mode is generated by angular momentum projections for neutrons and protons, respectively. It is found that the higher- and lower- component of the splited scissors resonance can be connected to the scissors mode based on neutron and proton...
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Satabdi Mondal (Department of Physics, Bankura University, PIN - 722155, West Bengal, India)Oral
In recent years, nuclear thermodynamics has become a prominent area of study, various temperature-dependent nuclear properties, such as the shapes of nuclei, widths of giant dipole resonances, and their fluctuation characteristics have been studied. In this context, a particularly intriguing focus lies in the intricate phase transitions occurring within atomic nuclei. In macroscopic...
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