  In the present paper, we explore the idea of isospin conservation in new
situations and contexts based on the directions provided by our earlier works.
We present the results of our calculations for the relative yields of
neutron-rich fission fragments emitted in fast neutron-induced fission, 238U
(n, fission) reaction by using the concept of the conservation of isospin and
compare with the experimental data. Our results successfully reproduced the
gross features of partition wise fission fragments distribution of 238U (n,
fission). This confirms that in all kinds of fission, isospin remains pure in
neutron-rich systems even at high excitations. Thus, isospin can be proven as
an important quantum number for the prediction of fission fragment
distribution.
