On the angular-momentum dependence of nuclear-level densities - Agrawal, B.K.; Ansari, A. (Elsevier)
Angular-momentum dependence of nuclear-level densities at finite temperatures are investigated in the static-path approximation (SPA) to the partition function using a cranked quadrupole-interaction hamiltonian in the following three schemes: (i) cranking about the x-axis, (ii) cranking about the z-axis and (iii) cranking about the z-axis but correcting for the orientation fluctuation of the axis. Performing numerical computations for an sd- and a pf-shell nucleus, we find that the x-axis-crankingss results are satisfactory for reasonably heavy nuclei and this offers a computationally faster method to include the angular-momentum dependence at high temperatures in the SPA approach. It also appears that at high spins the inclusion of the orientation-fluctuation correction would be important.
http://dx.doi.org/10.1016/0375-9474(94)90256-9
Keywords: U