Charge-Independence-Breaking Interactions in sd-Shell Nuclei | Zendy

K. Muto | Zendy; Satoshi Nakamura | Zendy; T. Oda | Zendy

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Charge-Independence-Breaking Interactions in sd-Shell Nuclei

Author(s) -

K. Muto,

Satoshi Nakamura,

T. Oda

Publication year - 1994

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp/91.2.287

Subject(s) - physics , isospin , independence (probability theory) , charge (physics) , shell (structure) , nuclear physics , scattering , shell model , atomic physics , particle physics , quantum mechanics , statistics , mathematics , materials science , composite material

Nuclear charge-independence-breaking interactions are studied by analyzing mass differences of isospin multiplets in sd-shell nuclei. It is shown that, being consistent with the results of low-energy NN scattering, the pn interaction is 2-3% more attractive than the like-nucleon interactions, and the one- and two-pion exchange potentials which originate from (n°, n±) mass difference account for about 70% of the observed charge independence breaking, after Coulomb contributions are subtract ed. The mass differences of isospin multiplets are well explained by introducing a supplementary phenomenological potential which, together with the pion-exchange potentials, reproduces the 1 So-state scattering length.

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