Level densities and survival probabilities of heaviest nuclei
Seminars
Low-Energy Nuclear Physics Seminar
Date and Time: Tuesday, 22 November 2022, at 11:00 AM
Venue: Blokhintsev Conference Hall (4th floor), Bogoliubov Laboratory of Theoretical Physics
Seminar topic: “Level densities and survival probabilities of heaviest nuclei”
Authors: A. Rahmatinejad, T. M. Shneidman, G. G. Adamian, N. V. Antonenko
Speaker: A. Rahmatinejad
Abstract:
The nuclear level densities of superheavy nuclei with Z=112-120 have been systematically studied using the single-particle energies obtained with the deformed Woods-Saxon potential [1]. The level density parameters are calculated by fitting the obtained results with the standard Fermi gas expression. The energetic course of the level-density parameters before reaching the asymptotic value, not taken into account so far, is of great importance for the estimation of the probabilities of de-excitation cascades via light particles emission in competition with fission and, thus, for the determination of the survival probabilities and total production cross sections of superheavy nuclei.
We analyzed the influence of shell effects on the energy dependence of level density parameters corresponding to the residues of various decay modes to those of neutron emission [2].
[1] P. Jachimowicz, M. Kowal, and J. Skalski, At. Data Nucl. Data Tables 138, 101393 (2021).
[2] A. Rahmatinejad, et al., Phys. Rev. C 105, 044328 (2022).