Level densities and spin cut-off factors have been investigated within the microscopic approach based on BCS Hamiltonian. In particular the spin cut-off
parameters have been calculated at neutron binding energies over a large range
of nuclear mass using the BCS theory. The results are compared with their
corresponding macroscopic values. It is found that the values of spin cut-off parameter do not
increase smoothly with A as expected based on macroscopic theory. Instead, the
values of spin cut-off parameter show structures re° / ecting the angular momentum of the shell
model orbitals near the Fermi energy.
The spin cut-off parameter has also been computed from the knowl-
edge of nuclear level density, at neutron binding energy, Bn and the average
s-wave neutron spacing. The values of spin cut-off parameter are
compared with their corresponding values from the model calculations.
The in° / uence of the isospin in nuclear level density in particular the isospin
cut-off parameter has also been investigated and are compared with their corre-
sponding spin cut-off parameters.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12608487/index.pdf |
| Date | 01 July 2007 |
| Creators | Gholami, Mehrdad |
| Contributors | Kildir, Mehmet |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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