Correlation between α-particle preformation probability and the energy levels of parent nuclei

Citation:
Ismail, M., and A. Adel, "Correlation between α-particle preformation probability and the energy levels of parent nuclei", Physical Review C - Nuclear Physics, vol. 86, no. 1, pp. 014616, 2012.

Abstract:

A realistic density-dependent nucleon-nucleon (NN) interaction with a finite-range exchange part which produces the nuclear matter saturation curve and the energy dependence of the nucleon-nucleus optical potential model is used to calculate the preformation probability, S α, of α decay from Po isotopes to superheavy nuclei. The variation of S α with the neutron number for the isotopes of Po, Rn, Ra, Th, and U elements is studied below and above the magic neutron number N=126. We found a strong correlation between the behavior of S α and the energy levels of the parent nucleus at and just below the Fermi level. S α has a regular behavior with the neutron number if the neutron pair of α particles, emitted from adjacent isotopes, comes from the same energy level or from a group of levels, assuming that the order of levels in this group is not changed. Irregular behavior of S α with the neutron number occurs if the levels of the adjacent isotopes change or holes are present in lower levels. © 2012 American Physical Society.

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