Determination of the nuclear level densities and radiative strength function for 43 nuclei in the mass interval 28≤A≤200

• Main Authors: Knezevic David, Jovancevic Nikola, Sukhovoj Anatoly M., Mitsyna Ludmila V., Krmar Miodrag, Cong Vu D., Hambsch Franz-Josef, Oberstedt Stephan, Revay Zsolt, Stieghorst Christian, Dragic Aleksandar
• Format: Article
• Language: English
• Published: EDP Sciences 2018-01-01
• Series: EPJ Web of Conferences
• Online Access: https://doi.org/10.1051/epjconf/201816900007

The determination of nuclear level densities and radiative strength functions is one of the most important tasks in low-energy nuclear physics. Accurate experimental values of these parameters are critical for the study of the fundamental properties of nuclear structure. The step-like structure in the dependence of the level densities p on the excitation energy of nuclei Eex is observed in the two-step gamma cascade measurements for nuclei in the 28 ≤ A ≤ 200 mass region. This characteristic structure can be explained only if a co-existence of quasi-particles and phonons, as well as their interaction in a nucleus, are taken into account in the process of gamma-decay. Here we present a new improvement to the Dubna practical model for the determination of nuclear level densities and radiative strength functions. The new practical model guarantees a good description of the available intensities of the two step gamma cascades, comparable to the experimental data accuracy.