Eur. Phys. J. A (2017) 53: 170
https://doi.org/10.1140/epja/i2017-12354-x

Regular Article - Theoretical Physics

Electromagnetic dipole and Gamow-Teller responses of even and odd ^90-94 ₄₀Zr isotopes in QRPA calculations with the D1M Gogny force

¹ CSNSM, CNRS and Université Paris-Sud, F-91405, Orsay Campus, France
² CEA, DAM, DIF, F-91297, Arpajon, France
³ ESNT, CEA-Saclay, DSM, Irfu, Service de Physique Nucléaire, F-91191, Gif-sur-Yvette Cedex, France

^* e-mail: sophie.peru-desenfants@cea.fr

Received: 26 July 2016
Accepted: 21 July 2017
Published online: 28 August 2017

Abstract

In this paper we present theoretical results on the dipole response in the proton spin-saturated ^90-94Zr isotopes. The electric and magnetic dipole excitations are obtained in Hartree-Fock-Bogolyubov plus Quasi-particle Random Phase Approximation (QRPA) calculations performed with the D1M Gogny force. A pnQRPA charge exchange code is used to study the Gamow-Teller response. The results on the pygmy, the giant dipole resonances as well as those on the magnetic nuclear spin-flip excitation and the Gamow-Teller transitions are compared with available experimental or theoretical information. In our approach, the proton pairing plays a role in the phonon excitations, in particular in the M1 nuclear spin-flip resonance.