title: Role of the Dirac sea in the quenching of Gamow-Teller strength.
abstract: The issue of the Gamow-Teller sum rule in atomic nuclei is reexamined in the framework of a relativistic description of nuclei. It is shown that the total Gamow-Teller strength in the nucleon sector is reduced by about 12% as compared to the prediction of a nonrelativistic description. This reduction is due to the antinucleon degrees of freedom.
authors.affiliation: Department of Physics, Faculty of Science, Chiba University, Chiba 263-8522, Japan.
authors.forename: Haruki
authors.initials: H
authors.lastname: Kurasawa
authors.forename: Toshio
authors.initials: T
authors.lastname: Suzuki
authors.forename: Nguyen Van
authors.initials: NV
authors.lastname: Giai