Abstract
The isospin dependences of the light-particle emission for fissioning isobaric sources 202Fr, 202Po, 202Tl and for isotopic sources 189,202,212Po as functions of excitation energy and angular momentum are studied by the Smoluchowski equation. Calculations show that different excitation energies and angular momenta do not change the dependence of particle emission on the isospin of the system. It is also shown that increasing the excitation energy and/or decreasing the angular momentum can greatly enhance the sensitivity of the emission of pre-scission particles to the nuclear viscosity coefficient. In particular, this sensitivity also depends on the isospin, indicating an important role of isospin in an accurate extraction of the viscosity coefficient by means of light-particle multiplicity.
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