Abstract
Using the stochastic Langevin model, we investigate the influence of dissipation on first-chance fission properties of nuclei and by calculating the drop of their first-chance fission probability caused by friction over their standard statistical-model value, , as a function of the presaddle friction strength () at different angular momenta and excitation energies. It is shown that the first-chance fission probability may be affected more largely at low angular momentum and that it is sensitive to and the sensitivity is significantly larger than that of the total fission probability. Furthermore, we find that for heavy , while the total fission probability is insensitive to , the first-chance fission probability depends sensitively on . Our findings suggest that, to more stringently constrain the presaddle friction strength, the measurement of the first-chance fission probability from those heavy fissioning systems could provide a more sensitive and suitable experimental approach.
- Received 3 September 2017
- Revised 3 November 2017
DOI:https://doi.org/10.1103/PhysRevC.97.014603
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