Open AccessRelativistic nuclear energy density functional approach to magnetic-dipole excitation
Author(s) -
T. Oishi,
Goran Kružić,
Nils Paar
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1643/1/012153
Subject(s) - excitation , random phase approximation , sum rule in quantum mechanics , physics , dipole , atomic physics , energy (signal processing) , magnetic dipole , neutron , density functional theory , nuclear physics , quantum mechanics , quantum chromodynamics
Magnetic-dipole (M1) excitations of 18 O and 42 Ca nuclei are investigated within a relativistic nuclear energy density functional framework. In our last work [1], these nuclei are found to have unique M1 excitation and its sum rule, because of their characteristic structure: the system consists of the shell-closure core plus two neutrons. For a more systematic investigation of the M1 mode, we have implemented a framework based on the relativistic nuclear energy density functional (RNEDF). For benchmark, we have performed the RNEDF calculations combined with the random-phase approximation (RPA). We evaluate the M1 excitation of 18 O and 42 Ca, whose sum-rule value (SRV) of the M1 transitions can be useful to test the computational implementation [1]. We also apply this RNEDF method to 208 Pb, whose M1 property has been precisely measured [2, 3, 4, 5]. Up to the level of the M1 sum rule, our result is in agreement with the experiments, except the discrepancy related with the quenching factors for g coefficients.