期刊
PHYSICAL REVIEW C
卷 86, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.86.014609
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资金
- Council of Scientific and Industrial Research (CSIR), Government of India
- Shyama Prasad Mukherjee program
- Department of Atomic Energy (DAE), Government of India
The prescission neutron multiplicity excitation function is measured for the first time for three isotopes across a major closed shell in order to investigate the shell effects on fission hindrance. Three isotopes of Fr(Fr-213,Fr-215,Fr-217) are populated by fusion of F-19+Pt-194,Pt-196,Pt-198 in the excitation energy range of 46.6-91.8 MeV. While Fr-213 has a major neutron shell closure at N = 126, Fr-215 and Fr-217 are away from the closed shell. It is found from the statistical model analysis of the experimental data that the strengths of nuclear dissipation for nuclei away from shell closure are very similar. On the other hand, the dissipation is relatively weaker for a shell-closed nucleus in comparison to adjacent nuclei away from shell closure.
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