Selfconsistent mean field calculations of the nuclear response using a realistic nucleon-nucleon interaction with a density dependent corrective term

20th International School on Nuclear Physics, Neutron Physics and Applications

Veselý, P.^1 ; De Gregorio, G.^1,2 ; Knapp, F.^3 ; Iudice, N. Lo^1,2 ; Bianco, D.^1,2,4 ; Andreozzi, F.^1,2 ; Porrino, A.^1,2

Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Napoli, Monte S. Angelo, via Cintia, Napoli

I-80126, Italy^1

Dipartimento di Fisica, Università di Napoli Federico II, Monte S. Angelo, via Cintia, Napoli

I-80126, Italy^2

Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic^3

Ecole Normale Superieur (ENS) de Cachan, 61 av. du Président Wilson, Cachan, France^4

关键词: Density dependent;    Dipole strengths;    Nuclear response;    Nucleon-nucleon interaction;    Pygmy resonance;    Quasi particles;    Random phase approximations;    Self-consistent mean field;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/533/1/012014/pdf
DOI  :  10.1088/1742-6596/533/1/012014

来源: IOP

【 摘 要 】

Tamm-Dancoff and random-phase approximations are formulated in the canonical Hartree-Fock-Bogoliubov quasi-particle basis and adopted to compute the E1 response in Ca isotopes using an intrinsic Hamiltonian composed of a Vlowkpotential, deduced from the CD-Bonn nucleon-nucleon interaction, corrected with phenomenological density dependent and spin-orbit terms. Attention is focused on the evolution of the dipole strength distribution, including the low-lying transitions associated to the pygmy resonance, in going from the N Z40Ca to Ca isotopes with neutron excess.