Eur. Phys. J. A (2003) 18: 571-575
https://doi.org/10.1140/epja/i2003-10100-9

Short Note

Effects of the N/Z of fissioning systems on the multiplicity of pre-scission particles

Department of Physics, Southeast University, 210096, Nanjing, China

^* e-mail: yewei@seu.edu.cn

Abstract

The influences of the neutron-to-proton ratio N/Z of fissioning systems on particle emission for isotopic sources of ^189,202,212Po and for isobaric sources of ²⁰² Tl, ²⁰² Po and ²⁰² Fr are investigated within the framework of Smoluchowski equation. It is shown that the multiplicity of emitted particles shows a strong dependence on the N/Z ratio of the fissioning sources. Calculations also show that when the N/Z ratio of a fissioning system becomes large, charged-particle emission becomes no longer sensitive to viscosity strength, which means that for those systems with larger N/Z ratio, protons and -particles are not good probes of extracting the value of the viscosity coefficient in fission.