Analysis of level structure and monopole effects in Ca isotopes

IF 3.6 1区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Science and Techniques Pub Date : 2024-09-18 DOI:10.1007/s41365-024-01555-6

Jin Li, Ai-Xi Chen, Amir Jalili, Han-Kui Wang

引用次数: 0

Abstract

Understanding the properties of nuclei near the double magic nucleus ⁴⁰Ca is crucial for both nuclear theory and experiments. In this study, Ca isotopes were investigated using an extended pairing-plus-quadrupole model with monopole corrections. The negative-parity states of ⁴⁴Ca were coupled with the intruder orbital \(g_{9/2}\) at 4 MeV. The values of \(E_{4+}\)/\(E_{2+}\) agree well with experimental trend from ⁴²Ca to ⁵⁰Ca, considering monopole effects between \(\nu f_{7/2}\) and \(\nu p_{3/2}\)(\(\nu f_{5/2}\)). This monopole effect, determined from data of ⁴⁸Ca and ⁵⁰Ca, supports the proposed new nuclear magic number \(N = 34\) by predicting a high-energy \(2^{+}\) state in ⁵⁴Ca.

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钙同位素的水平结构和单极效应分析

了解双魔核 40Ca 附近原子核的性质对于核理论和实验都至关重要。在这项研究中，我们使用一个具有单极修正的扩展配对加四极模型对钙同位素进行了研究。44Ca 的负奇偶态与 4 MeV 的入侵轨道 \(g_{9/2}\)耦合。考虑到\(\nu f_{7/2}\)和\(\nu p_{3/2}\)(\(\nu f_{5/2}\))之间的单极效应，\(E_{4+}\)/\(E_{2+}\)的值与从42Ca到50Ca的实验趋势一致。根据48Ca和50Ca的数据确定的这种单极效应，通过预测54Ca中的高能\(2^{+}\)态，支持了所提出的新核魔数\(N=34\)。

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

Nuclear Science and Techniques 物理-核科学技术

CiteScore

5.10

自引率

39.30%

发文量

141

审稿时长

5 months

期刊介绍： Nuclear Science and Techniques (NST) reports scientific findings, technical advances and important results in the fields of nuclear science and techniques. The aim of this periodical is to stimulate cross-fertilization of knowledge among scientists and engineers working in the fields of nuclear research. Scope covers the following subjects: • Synchrotron radiation applications, beamline technology; • Accelerator, ray technology and applications; • Nuclear chemistry, radiochemistry, radiopharmaceuticals, nuclear medicine; • Nuclear electronics and instrumentation; • Nuclear physics and interdisciplinary research; • Nuclear energy science and engineering.