753 research outputs found
Proton radioactivity half lives with Skyrme interactions
The potential barrier impeding the spontaneous emission of protons in the
proton radioactive nuclei is calculated as the sum of nuclear, Coulomb and
centrifugal contributions. The nuclear part of the proton-nucleus interaction
potential is obtained in the energy density formalism using Skyrme effective
interaction that results into a simple algebraic expression. The half-lives of
the proton emitters are calculated for the different Skyrme sets within the
improved WKB framework. The results are found to be in reasonable agreement
with the earlier results obtained for more complicated calculations involving
finite range interactions.Comment: 10 pages including 4 figures and 4 tables; Some typographical
mistakes in text and in Eq.(8) are correcte
The finite range simple effective interaction including tensor terms
The prediction of single particle level crossing phenomenon between
and orbitals in - and -isotopic chains by the
finite range simple effective interaction without requiring the tensor part is
discussed. In this case the experimentally observed crossing could be studied
as a function of nuclear matter incompressibility, . The estimated
crossing for the neutron number =46 could be reproduced by the equation of
state corresponding to =240 MeV. However, the observed proton gaps
between the and shells in and isotopic chain,
and the neutron gaps between the and shells in =82
isotones, as well as the shell closure properties at =28 require explicit
consideration of a tensor part as the central contribution is not enough to
initiate the required level splittings
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