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首页> 外文期刊>Physical review, C >Muon-capture strength functions in intermediate nuclei of 0v beta beta decays
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Muon-capture strength functions in intermediate nuclei of 0v beta beta decays

机译：0Vββ衰变中间核中捕获强度功能

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摘要

Capture rates of ordinary muon capture (OMC) to the intermediate nuclei of neutrinoless double beta (0v beta beta) decays of current experimental interest are computed. The corresponding OMC (capture-rate) strength functions have been analyzed in terms of multipole decompositions. The computed low-energy OMC-rate distribution to As-76 is compared with the available data of Zinatulina et al. [Phys. Rev. C 99, 024327 (2019)]. The present OMC computations are performed using the Morita-Fujii formalism by extending the original formalism beyond the leading order. The participant nuclear wave functions are obtained in extended no-core single-particle model spaces using the spherical version of proton-neutron quasiparticle random-phase approximation (pnQRPA) with two-nucleon interactions based on the Bonn one-boson-exchange G matrix. The Hamiltonian parameters are taken from our earlier work [Jokiniemi et al., Phys. Rev. C 98, 024608 (2018)], except for A = 82 nuclei for which the parameters were determined in this work. Both the OMC and 0v beta beta decays involve momentum exchanges of the order of 100 MeV and thus future measurements of the OMC strength functions for 0v beta beta daughter nuclei help trace the in-medium renormalization of the weak axial couplings with the aim to improve the accuracy of the 0v beta beta-decay nuclear matrix elements.
机译：计算普通μ子捕获（OMC）的捕获速率，从中微炎双β（0VβBETA）衰减当前实验兴趣的中微核的中间细胞核。在多极分解方面已经分析了相应的OMC（捕获速率）强度功能。将计算的低能量OMC速率分布与AS-76进行比较，与Zinatulina等人的可用数据进行比较。 [物理。 Rev. C 99,024327（2019）]。通过将原始形式主义扩展到领先订单之外，使用森田 - 富士形式主义来执行现在的OMC计算。使用基于BONN 1-Boson-Exchange G基质的双核相互作用，在扩展无核单粒子模型空间中获得参与者核波功能。哈密​​顿参数从我们之前的工作中取出[Jokiniemi等，Phy。 Rev. C 98,024608（2018）]除了在这项工作中确定参数的A = 82个核。 OMC和0VβBETA衰减都涉及100 MEV的动量交换，因此未来测量OMC强度功能对于0VβBETA女性核的OMC强度功能有助于追踪弱轴向联轴器的中等重整，以提高弱轴向联轴器0Vββ衰减核矩阵元素的准确性。

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