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首页> 外文期刊>Nuclear Physics, A: Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter and Their Actions >NEUTRINOLESS DOUBLE BETA DECAY IN HEAVY DEFORMED NUCLEI
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NEUTRINOLESS DOUBLE BETA DECAY IN HEAVY DEFORMED NUCLEI

机译：重度核素中性无核双β衰变

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The zero-neutrino mode of the double beta decay in heavy deformed nuclei is investigated in the framework of the pseudo-SU(3) model, which has provided an accurate description of collective nuclear structure and predicted half-lives for the two-neutrino mode in good agreement with experiments. In the case of U-238 the calculated zero-neutrino half-life is at least three orders of magnitude greater than the two-neutrino one, giving strong support of the identification of the radiochemically determined half-life as being the two-neutrino double beta decay, For Nd-150 th, zero-neutrino matrix elements are of the order of magnitude of, but lesser than, those evaluated using the QRPA. This result confirms that different nuclear models produce similar zero-neutrino matrix elements, contrary to the two-neutrino case, Using these pseudo-SU(3) results and the upper limit for the neutrino mass we estimate the beta beta(0 nu), half-lives for six nuclei, An upper limit for majoron coupling constant is extracted from the experimental data. [References: 56]
机译：在伪SU（3）模型的框架内研究了重变形核中双β衰变的零中微子模式，该模型为二中微子模式提供了准确的集体核结构描述和半衰期预测与实验非常吻合。对于U-238，计算得出的零中微子半衰期至少比二中微子半衰期大三个数量级，这为将放射化学确定的半衰期确定为二中微子的两倍提供了有力的支持。 β衰减，对于Nd-150，零中微子矩阵元素的数量级，但小于使用QRPA评估的元素。该结果证实，与两个中微子的情况相反，不同的核模型会产生相似的零中微子矩阵元素。使用这些伪SU（3）结果和中微子质量的上限，我们估算出beta beta（0 nu），六个核的半衰期，从实验数据中提取了马龙偶联常数的上限。 [参考：56]

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