Compound-Nuclear Reactions and Related Topics (CNR*24)

Session

NLD and PSF I

10 Jul 2024, 09:00

M Building, Boardroom A (Vienna International Centre)

91. 20 years of microscopic Nuclear Level Densities from drip lines to drip lines

Dr Stéphane hilaire (CEA, DAM, DIF)

10/07/2024, 09:00

Level Densities and Photon Strength Functions

Keynote

Nuclear reaction models, and in particular compound nucleus reactions, require the knowledge of nuclear level densities (NLDs), among other ingredients. For decades, analytical expressions have been used in nuclear reaction codes, due to the freedom they offer to the user to modify their associated parameters in order to fit cross sections.
The development of computational resources has...

83. Comparing Nuclear Level Densities: Particle Evaporation vs. Neutron Resonance Data

Alexander Voinov (Ohio University)

10/07/2024, 09:50

Level Densities and Photon Strength Functions

Invited oral

All level density models currently used in nuclear reaction codes are based on experimental data on absolute values of nuclear level density which are basically coming from two data sets: discrete level scheme at low excitation energies and the s-wave neutron resonance spacing (D0) at the neutron separation energy. These data are known in very limited ranges of excitation energies and spins....

67. The measurement of the level densities of neutron-rich ${}^{68}$Cu and ${}^{65}$Ni using the evaporation technique with a white neutron beam, and the improved neutron capture rates of ${}^{67}$Cu and ${}^{64}$Ni that are relevant for nucleosynthesis in low neutron exposure conditions.

Georgios Perdikakis (Department of Physics, Central Michigan University)

10/07/2024, 10:20

Level Densities and Photon Strength Functions

Oral

We employ a new method to extract the level densities of neutron-rich isotopes by utilizing (n,p) and (n,$\alpha$) reactions and the evaporation technique to analyze the emitted particle spectra. This level density extraction method is particularly suited to nucleosynthesis at low neutron exposures that typically proceeds by neutron captures along a path extending within a few neutrons away...