Neutrinoless ββ decay nuclear matrix elements in an isotopic chain
Neutrinoless ββ decay nuclear matrix elements in an isotopic chain
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同位素链中的无中微子 ββ 衰变核基质元素
DOI：
10.1016/j.physletb.2012.12.063
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发表时间：
2012
影响因子：
4.4
通讯作者：
G. Mart'inez
中科院分区：
文献类型：
--
作者：
T. R. Rodr'iguez;G. Mart'inez
我们分析了镉同位素计算的无中微子双β衰变的核矩阵元。能量密度泛函方法包括超越平均场效应，如对称性恢复和形状混合。强壳层效应被发现与初始和最终核的基本核结构有关。此外，我们还证明了在闭包近似下计算的双中微子双β衰变的NME，Mcl 2 ν，与无中微子NME的Gamow-Teller部分MGT 0 ν成正比。这开启了从β γ Gamow-Teller强度函数确定MGT 0 ν矩阵元素的可能性。最后讨论了形变、配对、组态混合和壳效应在NME中的相互作用。
We analyze nuclear matrix elements (NME) of neutrinoless double beta decay calculated for the cadmium isotopes. Energy density functional methods including beyond mean field effects such as symmetry restoration and shape mixing are used. Strong shell effects are found associated to the underlying nuclear structure of the initial and final nuclei. Furthermore, we show that NME for two-neutrino double beta decay evaluated in the closure approximation, Mcl2ν, display a constant proportionality with respect to the Gamow–Teller part of the neutrinoless NME, MGT0ν. This opens the possibility of determining the MGT0νmatrix elements from β∓Gamow–Teller strength functions. Finally, the interconnected role of deformation, pairing, configuration mixing and shell effects in the NMEs is discussed.