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首页> 外文期刊>Progress of Theoretical Physics >Single and double beta decay in N approximate to Z nuclei
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Single and double beta decay in N approximate to Z nuclei

机译：N中的单倍和双倍β衰变近似于Z核

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We study single and double beta decay for N approximate to Z nuclei, using an extended P + QQ interaction with four force strengths. The Gamov-Teller (GT) transition is examined using the proton-neutron QRPA (pn-QRPA) in many j shells and using a single j shell model calculation. First, we calculate the single P-decay strength. The integrated strengths of N approximate to Z nuclei in the fp shell region are reproduced well by the pn-QRPA, although some quenching factor is necessary for several cases. The model accounts for the experimental observation that the GT strength increases with decreasing [N - Z. The single j shell model calculation indicates that the GT strength becomes very large at N = Z. Second, we perform calculations for two-neutrino double beta -decay transition strengths for Ge-76 and Se-82. The results suggest fairly good applicability of the extended P + QQ interaction to single and double beta decay. [References: 48]
机译：我们使用具有四个力强度的扩展P + QQ相互作用，研究了N近似于Z核的单倍和双倍β衰变。使用许多j壳中的质子中子QRPA（pn-QRPA）并使用单个j壳模型计算来检查Gamov-Teller（GT）过渡。首先，我们计算单个P衰减强度。尽管在某些情况下需要一些淬灭因子，但pn-QRPA可以很好地再现fp壳区域中接近Z核的N的综合强度。该模型说明了实验观察结果，即GT强度随[N-Z ]的减小而增加。单壳模型的计算表明GT强度在N = Z时变得非常大。其次，我们对Ge-76和Se-82的两个中微子双β衰变跃迁强度进行了计算。结果表明扩展的P + QQ交互作用对于单个和双重beta衰减具有相当好的适用性。 [参考：48]

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