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- W2014090147 abstract "The dispersion relation which connects the real and the imaginary parts of the single-particle potential in finite nuclei is written in a form which involves an integration over the imaginary part at negative as well as at positive energies. The polarization and the correlation contributions to the shell-model potential can then be calculated by using as input the empirical values of the imaginary part of the single-particle potential. Numerical results are presented in the case of 40Ca and of 208Pb. It is found that the sum of the polarization and correlation contributions changes sign at the Fermi energy εF. It is surface peaked for nucleon energies E such that |E − εF| < 20 MeV. The corresponding contribution to the effective mass has a maximum centered on εF. This peak is much narrower at the nuclear surface than in the nuclear interior. An average effective mass can be defined by considering the volume integral of the average nuclear field. The full width at half-maximum of the enhancement peak of this average effective mass is equal to about 30 MeV in 40Ca and 15 MeV in 208Pb. These findings are in good agreement with the energy dependence of the depth of the real part of the empirical optical-model potential at positive and at negative energies." @default.
- W2014090147 created "2016-06-24" @default.
- W2014090147 creator A5039490266 @default.
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- W2014090147 date "1982-04-01" @default.
- W2014090147 modified "2023-10-14" @default.
- W2014090147 title "Polarization and correlation contributions to the shell-model potential in 40Ca and 208Pb" @default.
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- W2014090147 doi "https://doi.org/10.1016/0375-9474(82)90589-9" @default.
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