TY - JOUR

T1 - Spurious dipole mode in random-phase approximation and in models based on this approximation

AU - Tselyaev, V.

PY - 2022/12/26

Y1 - 2022/12/26

N2 - The problems related to the existence of the spurious dipole mode (SDM) in self-consistent nuclear-structure models are considered. A method is formulated that allows one to eliminate the coupling of the SDM with the physical modes in the extended random-phase approximation (ERPA) theories, in particular, in the time blocking approximation (TBA), which is a model of the ERPA type. It is shown that the application of this method in realistic TBA calculations of the E1 excitations gives results which are very close to the results of TBA calculations without using this method if the bare external-field E1 operators are replaced by effective ones.

AB - The problems related to the existence of the spurious dipole mode (SDM) in self-consistent nuclear-structure models are considered. A method is formulated that allows one to eliminate the coupling of the SDM with the physical modes in the extended random-phase approximation (ERPA) theories, in particular, in the time blocking approximation (TBA), which is a model of the ERPA type. It is shown that the application of this method in realistic TBA calculations of the E1 excitations gives results which are very close to the results of TBA calculations without using this method if the bare external-field E1 operators are replaced by effective ones.

U2 - 10.1103/PhysRevC.106.064327

DO - 10.1103/PhysRevC.106.064327

M3 - Article

VL - 106

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 6

M1 - 064327

ER -