Study of selected fission reactions with the application of Nilsson orbitals

Fission fragment angular anisotropies from neutron induced fission of 232Th and 235U were analyzed within the frame work of the statistical model. The analysis were made at neutron energies from threshold up to 50 MeV to deduce the variance K 2 of the K-distribution of levels in the transition nucleus. Our analysis shows, that the strength for the K-transition states comes mainly from the higher angular momentas and is in accordance with Nilsson model orbitals

<span style="font-size:10.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-US">Extracting nuclear level density of ⁵⁶Fe using a microscopic model with inclusion of pairing interaction</span>

706-708The nuclear level density and thermal properties of 56Fe have been extracted using the BCS Hamiltonian with inclusion of interacting fermions. Single particle levels for Nilsson potential have been used in the calculations. The shape of the energy and entropy curves has been interpreted as indication of a double phase excitation region and proposed as signature of the pairing phase transition. The results are compared to the experimental data obtained by the Oslo group

Influence of spin on fission fragments anisotropy

An analysis of selected fission fragment angular distribution when at least one of the spins of the projectile or target is appreciable in induced fission was made by using the statistical scission model. The results of this model predicate that the spins of the projectile or target are affected on the nuclear level density of the compound nucleus. The experimental data was analyzed by means of the couple channel spin effect formalism. This formalism suggests that the projectile spin is more effective on angular anisotropies within the limits of energy near the fusion barrier