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Systematic Study of Survival Probability of Excited Superheavy Nuclei

Author: XiaZuoJun
Tutor: SunBaoZuo；ZhouShanGui
School: Beijing University of Technology
Course: Theoretical Physics
Keywords: survival probability superheavy elements island of stability neutron emission fission
CLC: O571.6
Type: Master's thesis
Year: 2011
Downloads: 16
Quote: 0
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Abstract


The stability of excited superheavy nuclei (SHN) with 100≤Z≤134 againstparticle emission and ?ssion is investigated by using a statistical model. In particular,a systematic study of the survival probability against ?ssion in the 1n-channel, thedecay branching ratios (proton emission,α-particle emission, neutron emission and?ssion) and the total decay widths of these SHN is made. In present calculations theparticle separation energies and shell correction energies are consistently taken fromthe calculated results of the ?nite range droplet model which predicts an island ofstability of SHN around Z = 115 and N = 179. It turns out that this island of stabilitypersists for excited SHN in the sense that the calculated survival probabilities in the 1n-channel of excited SHN at the optimal excitation energy are maximized around Z = 115and N = 179. This indicates that the decay branching ratios (proton emission,α-particle emission, neutron emission and ?ssion), the total decay widths and the survivalprobability in the 1n-channel of SHN are mainly determined by the nuclear shell e?ects.

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CLC: > Mathematical sciences and chemical > Physics > Nuclear physics,high energy physics > Nuclear physics > Heavy ion nuclear physics
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