延迟粒子发射和集体旋转

IF 2.6 3区物理与天体物理 Q2 PHYSICS, NUCLEAR

The European Physical Journal A Pub Date : 2025-04-28 DOI:10.1140/epja/s10050-025-01550-4

K. Riisager, E. A. M. Jensen, A. S. Jensen

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引用次数: 0

摘要

sd-壳层下半部分的β延迟质子发射会引起原子核变形。我们导出了连接一个粒子从初始旋转核态发射到另一个最终旋转态的归一化矩阵元素，并提取了涉及K量子数的选择规则。初始状态近似为具有与最终核状态相同的核心。这种形式直接适用于偶z、偶N核的\(\beta ^+\) -延迟质子衰变或偶z、偶N核的\(\beta ^-\) -延迟中子衰变。这些衰变结果与可能的转移反应的结果进行了比较。以\(^{21}\) Mg的β延迟质子发射为例，获得了新的结构信息，并将量子数分配给了\(^{21}\) Na的几个态。

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Beta-delayed particle emission and collective rotations

Beta-delayed proton emission in the lower half of the sd-shell will involve deformed nuclei. We derive the normalized matrix element connecting emission of one particle from an initial rotational nuclear state to another final rotating state, and we extract selection rules involving the K quantum number. The initial state is approximated as having a core identical to the final nuclear state. The formalism is then directly applicable to \(\beta ^+\)-delayed proton decays of even-Z, odd-N nuclei or \(\beta ^-\)-delayed neutron decays of odd-Z, even N nuclei. These beta-decay results are compared to the outcomes of possible transfer reactions. As an example the beta-delayed proton emission of \(^{21}\)Mg is considered, where new structure information is obtained and quantum numbers assigned to several states in \(^{21}\)Na.

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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.