Takehiro Matsuse

Faculty of Textile Science and Technology
Shinshu University, Nagano 386, Japan

Sang-Moo Lee

Institute of Physics and Tandem Accelerator Center
University of Tsukuba, Ibaraki 305, Japan

We propose a new empirical formula of temperature dependent level density parameter "α" in which the shell structure energy is evaluated by using the nuclear ground state- and Liquid Drop Model-binding energy. The fission mass distributions populated through heavy ion reactions for the medium mass systems are well accounted for in terms of the Extended Hauser-Feshbach Method using the temperature dependent level density.

KEYWORDS: Temperature dependent level density, Shell structure energy, Fission mass distribution, Extended Hauser-Feshbach Method, Liquid Drop Model, Scission-Point Model