Influence of pairing on the nuclear matrix elements of the neutrinoless betabeta decays.
Influence of pairing on the nuclear matrix elements of the neutrinoless betabeta decays.
复制标题
配对对无中微子ββ衰变核基质元素的影响。
DOI：
10.1103/physrevlett.100.052503
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发表时间：
2007
影响因子：
8.6
通讯作者：
A. Poves
中科院分区：
文献类型：
--
作者：
E. Caurier;Javier Menéndez;F. Nowacki;A. Poves
本文在相互作用壳层模型框架下研究了无中微子双β衰变核矩阵元。我们分析它们的衰变中子对的总角动量和作为一个功能的资历截断的核子波函数。这个观点被证明是非常足够的衡量不同的核模型预测的NME的准确性。此外，它还将这个过程中的主角角色还给了配对相互作用，这是双β衰变发射体存在的原因。我们发现，低年资近似，相当于那些隐含在准粒子RPA在球形基础上，往往高估了NME的几个衰变。
We study in this Letter the neutrinoless double beta decay nuclear matrix elements (NME's) in the framework of the interacting shell model. We analyze them in terms of the total angular momentum of the decaying neutron pair and as a function of the seniority truncations in the nuclear wave functions. This point of view turns out to be very adequate to gauge the accuracy of the NME's predicted by different nuclear models. In addition, it gives back the protagonist role in this process to the pairing interaction, the one which is responsible for the very existence of double beta decay emitters. We show that low seniority approximations, comparable to those implicit in the quasiparticle RPA in a spherical basis, tend to overestimate the NME's in several decays.