Isoscalar monopole and quadrupole modes in Mo isotopes: Microscopic analysis

Physics Letters B

Wolfgang Kleinig¹  Danilo Gambacurta²  Valentin O. Nesterenko³  Gianluca Colò⁴  Jan Kvasil⁵  Alessandro Pastore⁶ 

[1] Corresponding author.;INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, Italy;LNS-INFN, I-95123, Catania, Italy;Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, via Celoria 16, I-20133 Milano, Italy;Extreme Light Infrastructure - Nuclear Physics (ELI-NP), Horia Hulubei National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Magurele, Jud. Ilfov, Romania;Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow Region, 141980, Russia;

关键词: Nuclear collective states;    Giant resonances;    Nuclear Equation of State;    Nuclear incompressibility;    Linear response theory;    Effective forces and energy density functionals;   

DOI  :  

来源: DOAJ

【 摘 要 】

The recent RCNP (α,α′) data on the Isoscalar Giant Monopole Resonance (ISGMR) and Isoscalar Giant Quadrupole Resonance (ISGQR) in 92,94,96,98,100Mo are analyzed within a fully self-consistent Quasiparticle Random Phase Approximation (QRPA) approach with Skyrme interactions, in which pairing correlations and possible axial deformations are taken into account. The Skyrme sets SkM*, SLy6, SVbas and SkPδ, that explore a diversity of nuclear matter properties, are used. We discuss the connection between the line shape of the monopole strength ISGMR and the deformation-induced coupling between the ISGMR and the K=0 branch of the ISGQR. The ISGMR is best described by the force SkPδ, having a low incompressibility K∞=202MeV. The ISGQR data are better reproduced by SVbas, that has large isoscalar effective mass m⁎/m=0.9. The need of a functional that can describe simultaneously the ISGMR and ISGQR data is stressed, with the requirement of suitable values of K∞ and m⁎/m. Possible extensions of the QRPA to deal with soft systems are also envisaged.

【 授权许可】

Unknown