Gogny-Hartree-Fock-Bogolyubov plus quasiparticle random-phase approximation predictions of the M 1 strength function and its impact on radiative neutron capture cross section

Abstract : Valuable theoretical predictions of nuclear dipole excitations in the whole chart are of great interest for different nuclear applications, including in particular nuclear astrophysics. Here we extend our large-scale calculations of the E1 γ-ray strength function, obtained in the framework of the axially-symmetric-deformed quasiparticle random phase approximation (QRPA) based on the finite-range D1M Gogny force, to the calculation of the M1 strength function. We compare our QRPA prediction of the M1 strength with available experimental data and show that a relatively good agreement is obtained provided the strength is shifted globally by about 2 MeV and increased by an empirical factor of 2. Predictions of the M1 strength function for spherical and deformed nuclei within the valley of β stability as well as in the neutron-rich region are discussed. Its impact on the radiative neutron capture cross section is also analyzed.
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Physical Review C, American Physical Society, 2016, 94 (4), pp.44306 - 44306. 〈10.1103/PhysRevC.94.044306〉
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https://hal-cea.archives-ouvertes.fr/cea-01504826
Contributeur : Valerie Poyeton <>
Soumis le : lundi 10 avril 2017 - 15:39:37
Dernière modification le : jeudi 11 janvier 2018 - 06:25:39

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S. Goriely, S. Hilaire, S. Péru, M. Martini, I. Deloncle, et al.. Gogny-Hartree-Fock-Bogolyubov plus quasiparticle random-phase approximation predictions of the M 1 strength function and its impact on radiative neutron capture cross section. Physical Review C, American Physical Society, 2016, 94 (4), pp.44306 - 44306. 〈10.1103/PhysRevC.94.044306〉. 〈cea-01504826〉

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