铝作为低本底实验中的本底源
Aluminum as a source of background in low background experiments
摘要：
无中微子双β衰变将是理解中微子质量本质的关键。下一代高纯锗实验必须在衰变Q值附近的感兴趣区域内，以优于10^-5计数/（kg y keV）的本底率进行操作。因此，到目前为止，必须考虑不相关的背景来源。锗探测器表面的金属化一般用铝来完成。讨论了由这种金属化引入的22 Na、26 Al、226 Ra和228 Th衰变的背景。它表明，只有一个特殊的选择铝可以保持这些背景的贡献是可以接受的。
英文摘要：
Neutrinoless double beta decay would be a key to understanding the nature of neutrino masses. The next generation of High Purity Germanium experiments will have to be operated with a background rate of better than 10^-5 counts/(kg y keV) in the region of interest around the Q value of the decay. Therefore, so far irrelevant sources of background have to be considered. The metalization of the surface of germanium detectors is in general done with aluminum. The background from the decays of 22Na, 26Al, 226Ra and 228Th introduced by this metalization is discussed. It is shown that only a special selection of aluminum can keep these background contributions acceptable.
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