Detailed study of the decay of $^{21}$Mg

IF 2.6 3区物理与天体物理 Q2 PHYSICS, NUCLEAR

The European Physical Journal A Pub Date : 2024-07-23 DOI:10.1140/epja/s10050-024-01376-6

E. A. M. Jensen, S. T. Nielsen, A. Andreyev, M. J. G. Borge, J. Cederkäll, L. M. Fraile, H. O. U. Fynbo, L. J. Harkness-Brennan, B. Jonson, D. S. Judson, O. S. Kirsebom, R. Lică, M. V. Lund, M. Madurga, N. Marginean, C. Mihai, R. D. Page, A. Perea, K. Riisager, O. Tengblad

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Abstract

Beta-delayed proton and gamma emission in the decay of $^{21}$Mg has been measured at ISOLDE, CERN with the ISOLDE Decay Station (IDS) set-up. The existing decay scheme is updated, in particular what concerns proton transitions to excited states in $^{20}$Ne. Signatures of interference in several parts of the spectrum are used to settle spin and parity assignments to highly excited states in $^{21}$Na. The previously reported $\beta $p$\alpha $ branch is confirmed. A half-life of 120.5(4) ms is extracted for $^{21}$Mg. The revised decay scheme is employed to test mirror symmetry in the decay and to extract the beta strength distribution of $^{21}$Mg that is compared with theory.

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关于 $$^{21}$$ Mg 衰变的详细研究

在欧洲核子研究中心的ISOLDE，利用ISOLDE衰变站（IDS）装置测量了$^{21}$Mg衰变中的β-延迟质子和伽马射线发射。对现有的衰变方案进行了更新，特别是有关质子跃迁到 $^{20}$Ne 中激发态的部分。频谱几个部分的干扰特征被用来解决（^{21}\）Na 中高度激发态的自旋和奇偶性分配问题。之前报道的 $β$p$α$ 分支得到了证实。提取到了$^{21}$Mg 的半衰期为 120.5(4) ms。修订后的衰变方案被用来检验衰变中的镜像对称性，并提取出了与（^{21}\）镁理论相比较的β强度分布。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The European Physical Journal A 物理-物理：核物理

CiteScore

5.00

自引率

18.50%

发文量

216

审稿时长

3-8 weeks

期刊介绍： Hadron Physics Hadron Structure Hadron Spectroscopy Hadronic and Electroweak Interactions of Hadrons Nonperturbative Approaches to QCD Phenomenological Approaches to Hadron Physics Nuclear and Quark Matter Heavy-Ion Collisions Phase Diagram of the Strong Interaction Hard Probes Quark-Gluon Plasma and Hadronic Matter Relativistic Transport and Hydrodynamics Compact Stars Nuclear Physics Nuclear Structure and Reactions Few-Body Systems Radioactive Beams Electroweak Interactions Nuclear Astrophysics Article Categories Letters (Open Access) Regular Articles New Tools and Techniques Reviews.

Detailed study of the decay of \(^{21}\)Mg

Abstract