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arXiv 1010.0103nucl-ex
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ZnMoO4晶体作为探测钼双β衰变的低温致冷测辐射热计的性能

Performance of ZnMoO4 crystal as cryogenic scintillating bolometer to search for double beta decay of molybdenum

L. Gironi, C. Arnaboldi, J. W. Beeman, O. Cremonesi, F. A. Danevich, V. Ya. Degoda, L. I. Ivleva, L. L. Nagornaya, M. Pavan, G. Pessina, S. Pirro, V. I. Tretyak, I. A. Tupitsyna

摘要:

首次用提拉法生长了ZnMoO_4单晶,并在85-400 K温度范围内测量了其在X射线激发下的发光。首次检验了ZnMoO_4晶体作为低温闪烁体的性能。ZnMoO 4晶体的放射性污染估计为<0.3 mBq/kg(228-Th)和8 mBq/kg(226-Ra)。由于闪烁光和声子信号的同时测量,α粒子可以从γ/β相互作用中区分出来,使得该化合物非常有希望用于寻找100-Mo的无中微子双β衰变。我们还报告了在没有光测量的情况下区分α诱导背景的能力,这要归功于表征γ/β和α粒子相互作用的热信号的不同形状。

英文摘要:

Zinc molybdate (ZnMoO4) single crystals were grown for the first time by the Czochralski method and their luminescence was measured under X ray excitation in the temperature range 85-400 K. Properties of ZnMoO4 crystal as cryogenic low temperature scintillator were checked for the first time. Radioactive contamination of the ZnMoO4 crystal was estimated as <0.3 mBq/kg (228-Th) and 8 mBq/kg (226-Ra). Thanks to the simultaneous measurement of the scintillation light and the phonon signal, the alpha particles can be discriminated from the gamma/beta interactions, making this compound extremely promising for the search of neutrinoless Double Beta Decay of 100-Mo. We also report on the ability to discriminate the alpha-induced background without the light measurement, thanks to a different shape of the thermal signal that characterizes gamma/beta and alpha particle interactions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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