Conveners
Nuclear Structure, Spectroscopy, and Decay: I
- Andreas Ekström
Nuclear Structure, Spectroscopy, and Decay: II
- Paul Greenlees
Nuclear Structure, Spectroscopy, and Decay: III
- Gillis Carlsson (Matematisk fysik, Lunds Universitet)
Nuclear Structure, Spectroscopy, and Decay: IV
- Joakim Cederkäll (Lund University)
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Gillis Carlsson (Matematisk fysik, Lunds Universitet)05/05/2026, 11:00invited
Accurate nuclear data are essential for simulations of new types of reactors and to deepen our understanding of the cosmos. The nuclear density-functional theory (DFT) has been developed to provide high accuracy binding energies and bulk properties of nuclei all over the nuclear chart. The quest to move from bulk properties to detailed spectroscopic information and reaction observables...
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Joonas Kalervo Ojala (University of Jyvaskyla (FI))05/05/2026, 11:25contributed 15+5
Shape coexistence is a phenomenon in which multiple shapes occur within the same nucleus. Although this phenomenon has been proposed to exist in various regions of the nuclear chart [1], neutron‑deficient Pb isotopes near the N=104 mid‑shell have been a primary focus of study for several decades. Notably, the neutron‑deficient $^{186}$Pb isotope exhibits three distinct shapes [2–5] at low...
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Rafael Antonio Lopez (Lund University)05/05/2026, 11:45contributed 12+3
Recent Monte Carlo Shell Model (MCSM) calculations made by T. Togashi et. al. [Phys. Rev. Lett. 121, 062501 (2018)] attempt to account for discrepancies observed between measurements and previous theoretical calculations of the reduced transition probability B(E2;$2^{+}_{1}->0^{+}_{1}$) in the neutron deficient Sn isotopes. One of the predictions of the MCSM calculation is that a shape change...
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Johannes Sørby Heines (Nuclear Physics Group, University of Oslo)05/05/2026, 12:00contributed 12+3
Strong triaxiality is rare in the nuclear chart, and such nuclei can serve as useful tests of theoretical predictions. The breaking of axial symmetry also enables phenomena which cannot occur in symmetrically deformed nuclei, making it an interesting phenomenon to study. The neutron rich region around mass 110 presents several cases of strong tiaxiality, namely in the ruthenium, molybdenum and...
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Kalle Auranen (University of Jyväskylä)05/05/2026, 12:15contributed 12+3
Since December 2020 a series of four experiments has been conducted to probe systematically the structure of all odd-A neutron-deficient actinium isotopes from $^{207}$Ac to $^{213}$Ac. In this campaign both recoil separators, RITU and MARA, of the Accelerator Laboratory of University of Jyväskylä, Finland (JYFL-ACCLAB) were employed. These experiments used fusion-evaporation reactions to...
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Karsten Riisager (Aarhus University)06/05/2026, 09:00invited
Beta decay increases in importance as a probe of nuclear structure as one moves towards the proton and neutron driplines. The decay energies increase so that more of the beta strength is available, and separation energies decrease leading to an increasing number of beta-delayed decay modes. I shall present an overview of which types of information have been extracted in light nuclei, here...
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Jeppe Schultz Nielsen (Aarhus University (DK))06/05/2026, 09:25contributed 15+5
The $\beta$-decay of $^8$He creates a significant background in antineutrino detectors based on the inverse $\beta$-decay mechanism due to the fact that it has $\beta$-delayed neutron final states and can be created by cosmic rays impinging on carbon. By providing excitation spectra and branching ratios for the $^8$He $\beta$-decay, this background can be quantified.
$^8$He is the most...
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Prof. Maria Jose G. Borge (Instituto de Estructura de la Materia, CSIC, Serrano 113bis, E-28006, Madrid, Spain)06/05/2026, 09:45contributed 15+5
The beta decay of 8B into 8Be is of interest both from nuclear structure and astrophysical point of view. For astrophysics, the 8B decay is the main source of solar neutrinos with energy higher than 2 MeV mainly coming from the intense (88%) beta branch of the 8B decay to the 3 MeV state of 8Be.
From the nuclear structure point of view, the 2+ 8B ground state is the only well-established...
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David Jenkins (University of York)06/05/2026, 10:05contributed 15+5
The teaching of nuclear physics has traditionally followed a rather rigid pedagogical perspective offering a chronological view of the evolution of the topic. Theoretical perspectives are emphasised such as the independent-particle shell model, moving on to collective models such as the rotational model. Comparison of model predictions with experimental data is frequently limited leaving the...
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You Zhou (Niels Bohr Institute (DK))07/05/2026, 14:00invited
One of the central challenges in nuclear physics is achieving a precise understanding of the structure of the atomic nucleus. Recent developments have shown that relativistic nuclear collisions at RHIC and the LHC can complement low‑energy nuclear experiments by providing a snapshot of the nuclear shape at the moment of collision, offering a sensitive probe of nuclear structure.
In this...
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Henna Kokkonen (University of Jyväskylä)07/05/2026, 14:25invited
Decay properties of two new astatine isotopes, $^{188}$At and $^{190}$At, were studied in the Accelerator Laboratory of University of Jyv\"askyl\"a, Finland. The nuclei were produced in fusion-evaporation reactions, and those were subsequently separated from the primary beam using the gas-filled recoil separator RITU (Recoil Ion Transfer Unit). Decay spectroscopy studies resulted with a proton...
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Andrea Idini (Lund University)07/05/2026, 14:50contributed 15+5
A microscopic and coherent description of nuclear structure and reactions is crucial to extend the predictivity of scattering observables, particularly for exotic nuclei that have not yet been discovered [1]. Optical potentials provide an effective way to decouple the nuclear structure many-body problem from the nuclear reaction few-body problem by constructing a projectile–target...
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Mikael Reponen (University of Jyvaskyla (FI))07/05/2026, 15:10invited
The different configurations of the atomic nucleus form a landscape of over 3000 known isotopes. However, even more than 100 years since its discovery
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by Ernest Rutherford, the complexity of the nucleus continues to elude a global theoretical description. To drive theory development, new experimental data
are required from unexplored reaches of the chart of nuclei. A key area for new data is... -
Erik Jensen (Chalmers University of Technology)08/05/2026, 09:00invited
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Hyeji Lee (University of Oslo)08/05/2026, 09:25contributed 12+3
The neutron halo is one of the most intriguing features in systems with a large excess of neutrons compared to protons, providing valuable information about weakly bound many-body systems near the neutron drip line. $^{17}$B has long been regarded as a two-neutron halo nucleus based on various experimental observations. However, recent studies suggest otherwise due to a dominant $d$-wave...
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Henna Joukainen (Chalmers University of Technology)08/05/2026, 09:40contributed 15+5
The level structures of two tungsten isotopes, $^{165}$W and $^{169}$W, have been experimentally well known up to high spin since over 30 years ago. However, in both cases, these structures were not connected to the ground states of the two nuclei. The reason for this, as it turns out, is the presence of an isomeric state preventing the observation of all transitions down to the ground state....
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Manu Kanerva08/05/2026, 10:00contributed 12+3
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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