Isospin Non-Conservation in Shell Model Approach and Applications

Yi Hua Lam , Nadezda A. Smirnova (1)

1 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

Up to now, empirical shell-model Hamiltonians for valence space calculations provide the most accurate description of the low-energy spectra and individual transitions of sd- and pf-shell nuclei. These features made them of particular importance for the description of the isospin-symmetry-breaking phenomena, such as energy splitting of the isobaric multiplets or isospin-forbidden transition rates. In this contribution, we demonstrate the applications of a recently constructed isospin non-conserving (INC) Hamiltonian in sd shell [Lam et al. Phys. Rev. C 87, 054304 (2013)]. First, we explore the partial decay scheme of 24Si and discuss the states affected by the Thomas-Ehrman shift. Second, we show the accuracy of the INC Hamiltonian for the description of the mirror energy differences.* The work is supported by the National Natural Science Foundation of China under Grant No. 11775277, the financial support to the “Théorie-ISB” project (IN2P3/CNRS, France), and the Ministry of Foreign Affairs and International Development of France in the framework of PHC Xu GuangQi 2015 under project No. 34457VA.

Domaines: Physique Nucléaire Théorique [nucl-th]

Yi Hua Lam, Nadezda A. Smirnova. Isospin Non-Conservation in Shell Model Approach and Applications. 16th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics, Sep 2017, Shanghai, China. pp.05006, ⟨10.1051/epjconf/201817805006⟩. ⟨hal-02058451⟩