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arXiv 0801.3760nucl-th
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无中子双β衰变的核矩阵元分解

Disassembling the Nuclear Matrix Elements of the Neutrinoless double beta Decay

J. Menéndez, A. Poves, E. Caurier, F. Nowacki

摘要:

本文在相互作用壳层模型(ISM)框架下分析了48-Ca,76-Ge,82-Se,124-Sn,130-Te和136-Xe核的无中微子双β衰变的核矩阵元(NME)。我们研究了核流中的高阶项、有限核尺寸效应和短程关联对它们的贡献的相对值,以及它们随波函数允许的最大优先级的演化。我们还讨论了建立的NME的衰变中子之间的距离的函数。我们计算了最终0+第一激发态的衰变,发现这些衰变至少比基态到基态的跃迁多25倍。

英文摘要:

In this article we analyze the nuclear matrix elements (NME) of the neutrinoless double beta decays of the nuclei 48-Ca, 76-Ge, 82-Se, 124-Sn, 130-Te and 136-Xe in the framework of the Interacting Shell Model (ISM). We study the relative value of the different contributions to them, such as higher order terms in the nuclear current, finite nuclear size effects and short range correlations, as well as their evolution with the maximum seniority permitted in the wave functions. We discuss also the build-up of the NME's as a function of the distance between the decaying neutrons. We calculate the decays to final 0+ first excited states and find that these decays are at least 25 times more supressed with respect to the ground state to ground state transition.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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