AUTHOR=Kadiani P. Mehdipour 

TITLE=Deformation Parameters and Collective Temperature Changes in Photofission Mass Yields of Actinides Within the Systematic Statistical Scission Point Model

JOURNAL=Frontiers in Physics

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.629978

DOI=10.3389/fphy.2021.629978

ISSN=2296-424X

ABSTRACT=The photofission fragments mass yields of actinides are evaluated
using systematic statistical scission point model. In this model,
all energies at scission point are presented as a linear function of
the mass numbers of fission fragments. The mass yields are
calculated with an new approximated relative probability for each
complementary fragment.  The agreement with the experimental data is
quite good, specially with a collective temperature T_{col} of 2
MeV at intermediate excitation energy and T_{col} = 1 MeV for
spontaneous fission. This indicates that the collective temperature
is greater than the value obtained by the initial excitation energy.

The generalized superfluid model is applied for calculating the
fragments temperature. The deformation parameters of fission
fragments have been obtained by fitting the calculated results with
the experimental values. This indicates that the deformation
parameters decrease with increasing the excitation energy. Also,
these parameters decrease for odd mass number fissioning systems.