Affiliation:
1. Department of Physics, Southeast University, Nanjing 210096, People's Republic of China
Abstract
We study the variation of the post-saddle giant dipole resonance (GDR) γ-ray multiplicity associated with the fission of the heavy nuclei 240 Cf , 246 Cf , 252 Cf and 240 U with the post-saddle friction strength (β) in the framework of a Langevin model. Calculations show the emitted post-saddle γ emission becomes less sensitive to β with increasing isospin of the the system, and the sensitivity almost disappears for the case of 240 U . We suggest that to accurately obtain information of the post-saddle friction strength by measuring pre-scission GDR γ-ray multiplicities, it is optimal to choose among the various compound systems those with low isospin.
Publisher
World Scientific Pub Co Pte Lt
Subject
General Physics and Astronomy,Nuclear and High Energy Physics