Damping mechanism of the isoscalar giant monopole resonance in 58Ni

IF 1.7 4区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Physics A Pub Date : 2025-04-02 DOI:10.1016/j.nuclphysa.2025.123078

A. Bahini , P. von Neumann-Cosel , J. Carter , I.T. Usman , N.N. Arsenyev , A.P. Severyukhin , E. Litvinova , R.W. Fearick , R. Neveling , P. Adsley , N. Botha , J.W. Brümmer , L.M. Donaldson , S. Jongile , T.C. Khumalo , M.B. Latif , K.C.W. Li , P.Z. Mabika , P.T. Molema , C.S. Moodley , J.J. van Zyl

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引用次数: 0

Abstract

Following the success achieved in explaining the origin of fine structure observed in the isoscalar giant quadrupole resonance (ISGQR) and the isovector giant dipole resonance (IVGDR), fine structure in the region of the isoscalar giant monopole resonance (ISGMR) were investigated using the wavelet analysis in order to investigate the role of different mechanisms contributing to its decay width. In this context, high-energy resolution ISGMR data on many nuclei were acquired at the iThemba Laboratory for Accelerator Based Sciences (iThemba LABS). The experimental scales extracted from these data are compared to different theoretical approaches performed in the framework of quasiparticle random phase approximation (QRPA) and beyond-QRPA including complex configurations using both non-relativistic and relativistic density functional theory. The role of Landau fragmentation was highlighted while the inclusion of coupling between one particle-one hole (1p-1h) and two particle-two hole (2p-2h) configurations modify the strength distributions and wavelet scales indicating the importance of the spreading width.

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来源期刊

Nuclear Physics A 物理-物理：核物理

CiteScore

3.60

自引率

7.10%

发文量

113

审稿时长

61 days

期刊介绍： Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.