Seminarium Fizyki Jądra Atomowego
sala 1.01, ul. Pasteura 5
2024-04-25 (10:15) 
mgr Aleksander Augustyn (Szkoła Doktorska NCBJ, Świerk)
Multidimensional random walk for calculating the fusion/fission probabilities of superheavy elements
One of the important, ongoing goals in nuclear physics is the creation of superheavy elements with Z=119 and Z=120. The experiments which try to achieve this objective are very timeconsuming, because of the low production cross sections. Theoretical calculations may give valuable insight into choosing the most effective reactions and bombarding energies for experimentalists.
In this talk, a new method [1] for predicting the probability of fusion of superheavy elements will be presented. The approach uses an unconstrained, biased random walk algorithm, in which the shape evolution is governed by the density of states above the multidimensional potential energy surface (PES). The PESs were calculated within the latest version of the Warsaw macroscopic-microscopic model [2], with rotational energy included.
Three cold fusion reactions will be examined in detail: 48Ca+208Pb, 50Ti+208Pb and 54Cr+208Pb.
The calculated probabilities of fusion for these reactions will be shown. The influence of angular momentum and excitation energy on ratios of symmetric and asymmetric divisions will be demonstrated.
Future improvements and possible applications of the method in modelling the fission of superheavy elements will also be discussed.
[1] T. Cap, A. Augustyn, M. Kowal, K. Siwek-Wilczyńska, “Dipole-Driven Multidimensional Fusion: An Insightful Approach to the Formation of Superheavy Nuclei”, submitted to Phys. Rev. C
[2] P. Jachimowicz, M. Kowal, and J. Skalski, At. Data. Nucl. Data. Tables. 138, 101393 (2021).
In this talk, a new method [1] for predicting the probability of fusion of superheavy elements will be presented. The approach uses an unconstrained, biased random walk algorithm, in which the shape evolution is governed by the density of states above the multidimensional potential energy surface (PES). The PESs were calculated within the latest version of the Warsaw macroscopic-microscopic model [2], with rotational energy included.
Three cold fusion reactions will be examined in detail: 48Ca+208Pb, 50Ti+208Pb and 54Cr+208Pb.
The calculated probabilities of fusion for these reactions will be shown. The influence of angular momentum and excitation energy on ratios of symmetric and asymmetric divisions will be demonstrated.
Future improvements and possible applications of the method in modelling the fission of superheavy elements will also be discussed.
[1] T. Cap, A. Augustyn, M. Kowal, K. Siwek-Wilczyńska, “Dipole-Driven Multidimensional Fusion: An Insightful Approach to the Formation of Superheavy Nuclei”, submitted to Phys. Rev. C
[2] P. Jachimowicz, M. Kowal, and J. Skalski, At. Data. Nucl. Data. Tables. 138, 101393 (2021).