A separation method of 0ν- and 2ν-events in double beta decay experiments with DCBA
A separation method of 0ν- and 2ν-events in double beta decay experiments with DCBA
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DCBA双β衰变实验中0ν-和2ν-事件的分离方法
DOI：
10.1016/s0168-9002(99)01003-7
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发表时间：
2000
影响因子：
1.4
通讯作者：
S. Kitamura
中科院分区：
文献类型：
--
作者：
N. Ishihara;T. Inagaki;T. Ohama;K. Omata;S. Takeda;Y. Yamada;T. Emura;R. Itoh;Y. Kato;Y. Sakamoto;K. Shimada;N. Tamura;S. Kitamura
称为漂移室 β 射线分析仪 (DCBA) 的探测器将提供双 β 衰变中每个 β 射线的动量信息。 DCBA 有望在粒子识别、检测效率、背景消除和衰变源集成方面具有良好的能力。在无中微子双β衰变中质量机制占主导地位的假设下，模拟研究表明，尽管DCBA的能量分辨率相对较差，但利用双β衰变事件的总能量分布和单能量分布的组合方法，可以借助计算的核矩阵元素将0ν和2ν事件分离到有效中微子质量的0.05 eV。
A detector called Drift Chamber Beta-ray Analyzer (DCBA) will provide momentum information of each β-ray in double beta decay. The DCBA is expected to have good capabilities for particle identification, detection efficiency, background elimination and decay-source integration. Under the assumption of mass mechanism dominance in neutrinoless double beta decay, a simulation study shows that a combination method using both sum and single-energy distributions of double beta decay events can separate 0ν- and 2ν-events down to 0.05 eV of the effective neutrino mass with the help of a calculated nuclear matrix element, even though the DCBA has relatively poor energy resolution.