Emergence of magnetic dipole band in 88Sr due to novel stretched coupling scheme

IF 4.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2025-02-14 DOI:10.1016/j.physletb.2025.139324

B. Das , Md.S.R. Laskar , R. Palit , S. Rajbanshi , V. Malik , F.S. Babra , S. Chattopadhyay , Biswajit Das , P. Dey , A. Kundu

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引用次数: 0

Abstract

High spin states of ⁸⁸Sr have been populated using ¹³C + ⁸²Se reaction. The structure of a negative parity band consisting of six magnetic dipole transitions with energies of 605 - 490 - 311 - 267 - 528 - 974 keV extending up to

I^{π}

13^{-}

was investigated through lifetimes measurements using Doppler Shift Attenuation Method (dsam). The extracted transition strengths from the measured lifetimes initially increase with spin and then decrease beyond

I^{π}

10^{-}

. The observed gamma-ray energy behaviour and that of transition rates were explained using a novel stretched coupling scheme. In this geometrical model, an interplay between a particle-particle attractive shears and two particle-hole repulsive shears has been invoked to explain the observed behaviour. This confirms the existence of an attractive shears between two particle blades for the first time in any nuclei.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.