K. Tsukada et al., MASS YIELD AND ANGULAR-DISTRIBUTION OF RARE-EARTH ELEMENTS PRODUCED IN PROTON-INDUCED FISSION OF PU-244, Journal of alloys and compounds, 213, 1994, pp. 414-416
In the fission system Pu-244+p, formation cross sections of rare earth
products were observed in the proton energy range 10 to 16 MeV, and t
heir angular distributions were measured in detail of proton energy of
15 MeV. The highest mass number of rare earth products was 162 which
corresponded to a highly asymmetric mass division of A(H)/A(L) approxi
mate to 2. The incident energy dependence and angular anisotropies of
rare earth products were found to be the same, even for highly asymmet
ric mass division, and no clear evidence was observed for the effect o
f neutron numbers 50 and 97 on cross section and angular anisotropy. T
hese observations lead to the conclusion that the fission process, lea
ding to highly asymmetric mass division, experiences the same saddle p
oint in the course of deformation toward scission as that for other ty
pical asymmetric mass division.