Random coincidence of 2ν2β decay events as a background source in bolometric 0ν2β decay experiments
Random coincidence of 2ν2β decay events as a background source in bolometric 0ν2β decay experiments
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2ν2β 衰变事件的随机巧合作为辐射热 0ν2β 衰变实验中的背景源
DOI：
10.1140/epjc/s10052-012-1989-y
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
V. Tretyak
中科院分区：
文献类型：
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作者：
D. Chernyak;F. Danevich;A. Giuliani;E. Olivieri;M. Tenconi;V. Tretyak
由于2ν2β事件的随机重合，在时间分辨率很差的情况下，即使在寻找无中微子双β衰变的高能量分辨率探测器中，双中微子双β衰变也会产生不可消除的背景。讨论了在低温蒸发测辐射热计中抑制这种背景的可能性。它表明，目前的测辐射热探测器技术，使人们能够控制这种形式的背景所需的水平，探索中微子质量模式的倒置层次，包括的情况下，测辐射热计搜索的中微子无双β衰变的100 Mo，其特点是一个相对较短的双中微子双β衰变半衰期。
Two-neutrino double β decay can create an irremovable background even in high energy resolution detectors searching for neutrinoless double β decay due to random coincidence of 2ν2β events in the case of poor time resolution. Some possibilities for suppressing this background in cryogenic scintillating bolometers are discussed. It is shown that the present bolometric detector technologies enable one to control this form of background at the level required to explore the inverted hierarchy of the neutrino mass pattern, including the case of bolometers searching for the neutrinoless double β decay of 100Mo, which is characterized by a relatively short two-neutrino double β decay half-life.