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- Qi, Chong, et al.
(författare)
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Microscopic mechanism of charged-particle radioactivity and generalization of the Geiger-Nuttall law
- 2009
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Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 80:4, s. 044326-
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Tidskriftsartikel (refereegranskat)abstract
- A linear relation for charged-particle emissions is presented starting from the microscopic mechanism of the radioactive decay. It relates the logarithms of the decay half-lives with two variables, called. chi' and. rho', which depend upon the Q values of the outgoing clusters as well as the masses and charges of the nuclei involved in the decay. This relation explains well all known cluster decays. It is found to be a generalization of the Geiger-Nuttall law in a radioactivity, and therefore we call it the universal decay law. Predictions of the most likely emissions of various clusters are presented by applying the law over the whole nuclear chart. It is seen that the decays of heavier clusters with nonequal proton and neutron numbers are mostly located in the trans-lead region. The emissions of clusters with equal protons and neutrons, like C-12 and O-16, are possible in some neutron-deficient nuclei with Z >= 54.
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| 2. |
- Qi, Chong, 1983-, et al.
(författare)
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Proton resonance properties in light nuclei with mean-field type potentials
- 2008
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Ingår i: INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS. ; , s. 1955-1964
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Konferensbidrag (refereegranskat)abstract
- The properties of proton resonances in the p and sd shells are studied with a single-particle potential generated by self-consistent-mean field calculations. Besides, we also propose to calculate the proton-nucleus interaction by a double-folding procedure with the density of the daughter nucleus represented by the result of the same mean-field model. With out raising any adjustable parameter, these calculations provide reasonable estimates for the widths of observed proton resonances in light nuclei. The mean-field-based calculation is particularly useful for the predications of the properties of resonances in light exotic nuclei and the direct proton capture reactions of astrophysics.
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