Jb. Fitzgerald et al., FRAGMENT MASS DEPENDENCE OF THE HIGH-ENERGY GAMMA-RAY SPECTRUM IN FISSION, ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 355(4), 1996, pp. 401-405
Experiments at the Heidelberg-Darmstadt Crystal Ball have shown an inc
reased gamma-intensity in the region 3-9 MeV for fission events with o
ne fragment near A similar to 132 produced in three compound nucleus f
ission reactions Au-197(F-19,f), Th-232(O-18,f), and U-238(O-18,f) at
120 MeV as well as in the spontaneous fission of Cf-252. Trends in the
data are reproduced by an empirical description based on known shell-
related properties of neutron-rich nuclei northwest of the doubly magi
c nucleus Sn-132. Theoretical attempts to account for the experimental
results are reviewed.