DREB2022 - Direct Reactions with Exotic Beams

Session

THU4

Jun 30, 2022, 4:50 PM

Facultad de Ciencias de la Comunicación (University of Santiago de Compostela)

Conveners

THU4

• Filomena Nunes

256. Two-neutron transfer: shape phase transitions and coexistence

Dr José Antonio Lay Valera (Dpto. de Física Atómica, Molecular y Nuclear, Universidad de Sevilla)

6/30/22, 4:50 PM

Oral contribution

A crucial problem in Physics is the study of Quantum Phase transitions. In nuclei, one finds shape phase transitions along isotopic chains where the nuclei change for example from a spherical ground state to a prolate one as long as we increase the number of neutrons above a certain critical value. This situation is usually studied in terms of energy ratios of the excited states and B(E2)...

257. Nuclear Josephson-like γ-emission

Prof. Francisco Barranco (University of Seville)

6/30/22, 5:10 PM

Oral contribution

Nucleon pair transfer processes between superfluid nuclei in heavy ion reactions are considered as possible analogues of the transfer of Cooper pairs [1] of electrons through Josephson Junctions (JJ) [2]. A particular signature of this analogy
concerns the dependence of absolute pair transfer cross sections on the number of transferred pairs [3-11]. In this contribution we present a novel...

186. Informing direct neutron capture for the weak r-process via the (d,p) reaction with 84Se beams at two energies

Jolie Cizewski

6/30/22, 5:30 PM

Oral contribution

Neutron capture reactions on nuclei near neutron shell closures predominantly proceed via direct-semi-direct processes that require knowledge of the neutron spectroscopic strengths of specific excitations. Understanding neutron capture on neutron-rich nuclei near N=50 is also important for understanding the synthesis of nuclei via a weak r-process [1]. Of particular interest is neutron...

225. Applications of ab initio nuclear theory to astrophysics reactions

Dr Petr Navratil (TRIUMF)

6/30/22, 5:50 PM

Oral contribution

A realistic description of atomic nuclei, in particular light nuclei characterized by clustering and low-lying breakup thresholds, requires a proper treatment of continuum effects. We have developed an approach, the No-Core Shell Model with Continuum (NCSMC) [1,2], capable of describing both bound and unbound states in light nuclei in a unified way. With chiral two- and three-nucleon...

223. Direct reactions studies with the AT-TPC

Daniel Bazin (FRIB/MSU)

6/30/22, 6:10 PM

Oral contribution

The Active Target Time Projection Chamber (AT-TPC) has been used successfully in a number of pioneering experiments ranging from resonant scattering to high energy charge exchange. The key experimental factor common to these experiments is the detection of low energy recoils in a thick target without loss of resolution. The high luminosity provided by this methodology extends the scientific...

261. Peeling off Neutrons: Using Fragmentation Reactions to Measure the Neutron Skin

Andrea Jedele

6/30/22, 6:30 PM

Oral contribution

By studying the neutron skin thickness across the Sn isotopic chain, one can gain a rich insight into the slope of the density dependence of the symmetry energy. A novel method using the total neutron-removal cross section (𝜎𝛥N) has been shown to be highly sensitive to the slope, with a 1% change in 𝜎𝛥N corresponding to a variation of L=±5 MeV. Experiments have been performed at GSI at 400<E/A...