Eur. Phys. J. A (2019) 55: 232
https://doi.org/10.1140/epja/i2019-12896-9

Regular Article - Theoretical Physics

Study of dipole excitations in even-even ^156-166Dy with QRPA using the Gogny force

¹ CEA, DAM, DIF, F-91297, Arpajon, France
² CSNSM, Orsay, France
³ Institut d’Astronomie et d’Astrophysique, Université libre de Bruxelles, CP-226, 1050, Brussels, Belgium
⁴ DRII-IPSA, 63 boulevard de Brandebourg, 94200, Ivry-sur-Seine, France

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

Received: 20 May 2019
Accepted: 24 September 2019
Published online: 3 December 2019

Abstract

The success encountered in the systematic studies of the electric and magnetic strength functions for almost all even-even nuclei proves the quality of our HFB+QRPA calculations which use the Gogny interaction within the whole nuclear chart. In this paper, we study the dipole electromagnetic strength distribution in ^158-166Dy. The scalar or the vector nature, in the isospin as well as in the spin space, is analysed according to transition density for some of the M1 excitations in ¹⁶²Dy.