用融合蒸发填充32Si和29Al的交叉壳层激发态

IF 1.7 4区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Physics A Pub Date : 2025-02-14 DOI:10.1016/j.nuclphysa.2025.123042

J. Williams , G. Hackman , K. Starosta , R.S. Lubna , Priyanka Choudhary , S. Sahoo , P.C. Srivastava , C. Andreoiu , D. Annen , H. Asch , M.D.H.K.G. Badanage , G.C. Ball , M. Beuschlein , H. Bidaman , V. Bildstein , R. Coleman , A.B. Garnsworthy , B. Greaves , G. Leckenby , V. Karayonchev , Z. Yu

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引用次数: 0

摘要

在N=20“反转岛”附近的富中子sd壳层中，N=20壳隙的演化由负偶价态的能量表示，负偶价态的能量主要是由单中子激发到跨壳隙的高轨道引起的。这些负宇称态通常具有高自旋（由于0f7/2轨道的参与），因此优先使用融合蒸发反应填充。我们用12C（22Ne,2p）和12C（22Ne,αp）反应研究了32Si和29Al的中间能级，确定了两种核素的几个负平价态。

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Cross-shell excited states in 32Si and 29Al populated using fusion-evaporation

In the neutron-rich sd shell near the

N = 20

‘island of inversion’, the evolution of the

N = 20

shell gap is indicated by the energies of negative-parity states which primarily arise due to single neutron excitation to higher lying orbitals across the shell gap. These negative-parity states often have high spin (due to the participation of the

0 f_{7 / 2}

orbital) and are therefore preferentially populated using fusion-evaporation reactions. We have studied the intermediate energy levels of ³²Si and ²⁹Al using ¹²C(²²Ne,2p) and ¹²C(²²Ne,αp) reactions, identifying several negative-parity states in both nuclides.

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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.