Neutrinoless Double Beta Decay with SNO+

Neutrinoless Double Beta Decay with SNO+
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具有 SNO 的无中微子双贝塔衰变

DOI:
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发表时间:
2012
期刊:
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通讯作者:
J. Hartnell
J. Hartnell
中科院分区:
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文献类型:
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作者:
J. Hartnell

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SNO+将通过在780吨线性烷基苯液体闪烁体中装载O(吨)钕来寻找无中微子双β衰变。使用 0.1% 负载的天然 Nd 将提供 43.7 kg 的 150Nd(鉴于其丰度为 5.6%),并且允许实验在 3 年的运行中在 90% C.L 下达到对 100-200 meV 有效中微子质量的灵敏度。 SNO+探测器具有超低本底、7000吨水屏蔽和闪烁体自屏蔽。将使用蒸馏和其他几种纯化技术,以达到 Borexino 水平的背景。该实验已获得全额资助,将于 2012 年开始使用轻水采集数据,随后于 2013 年开始使用闪烁体数据。
SNO+ will search for neutrinoless double beta decay by loading 780 tonnes of linear alkylbenzene liquid scintillator with O(tonne) of neodymium. Using natural Nd at 0.1% loading will provide 43.7 kg of 150Nd given its 5.6% abundance and allow the experiment to reach a sensitivity to the effective neutrino mass of 100-200 meV at 90% C.L in a 3 year run. The SNO+ detector has ultra low backgrounds with 7000 tonnes of water shielding and self-shielding of the scintillator. Distillation and several other purification techniques will be used with the aim of achieving Borexino levels of backgrounds. The experiment is fully funded and data taking with light-water will commence in 2012 with scintillator data following in 2013.