Coulomb excitation of the | T z | = 1 2 , A = 23 mirror pair
Coulomb excitation of the | T z | = 1 2 , A = 23 mirror pair
复制标题
| 库仑激发
DOI：
10.1103/physrevc.105.034332
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发表时间：
2022
影响因子：
3.1
通讯作者：
Henderson J
中科院分区：
文献类型：
--
作者：
Henderson J
背景：电四极()强度与原子核的基本四极形变有关，对许多核理论提出了挑战。线附近的镜像核代表了一个方便的实验室，利用系统的同位旋对称性来测试这类模型中的缺陷。目的：与文献中的强度相关的不确定性是壳层中一些最大的原子核。本文的目的是提高这些值的已知精度，以便更好地与理论模型进行比较。方法：在TRIUMF-ISAC装置上使用TIGRESS光谱仪进行库仑激发测量。结果：提取了混合跃迁的还原跃迁强度。两种同位素的计算精度都提高了约6倍，同时在不确定度范围内与以前的测量结果一致。结论：用壳层模型和AB初始价空间介质中相似重整化群计算方法进行了比较。价空间中介质相似重整化群计算被发现低估了绝对强度，这与以前的研究一致。
Background:Electric-quadrupole () strengths relate to the underlying quadrupole deformation of a nucleus and present a challenge for many nuclear theories. Mirror nuclei in the vicinity of the line ofrepresent a convenient laboratory for testing deficiencies in such models, making use of the isospin symmetry of the systems.Purpose:Uncertainties associated with literaturestrengths inare some of the largest innuclei in theshell. The purpose of the present paper is to improve the precision with which these values are known, to enable better comparison with theoretical models.Methods:Coulomb-excitation measurements ofandwere performed at the TRIUMF-ISAC facility using the TIGRESS spectrometer. They were used to determine thematrix elements of mixedtransitions.Results:Reducedtransition strengths,, were extracted forand. Their precision was improved by factors of approximately 6 for both isotopes, while agreeing within uncertainties with previous measurements.Conclusions:A comparison was made with both shell-model andab initiovalence-space in-medium similarity renormalization group calculations. Valence-space in-medium similarity renormalization group calculations were found to underpredict the absolutestrength, in agreement with previous studies.