Variation of nuclear level density with angular momentum

Abstract

Neutron evaporation energy spectra have been measured in coincidence with $\ensuremath{\gamma}$ rays of different multiplicities for ${}^{119}$Sb${}^{*}$ in the excitation energy range of $\ensuremath{\sim}31$--43 MeV. The inverse level density parameter ($k$) have been extracted for different angular momentum regions corresponding to different $\ensuremath{\gamma}$-ray multiplicities by comparing the experimental neutron energy spectra with statistical model prediction. It has been observed that the level density increases with the increase in angular momentum. Possible reasons for this variation have been discussed.