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arXiv 0905.4282astro-ph.IM
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CRESST探测器的电子和γ本底

Electron and Gamma Background in CRESST Detectors

R. F. Lang, G. Angloher, M. Bauer, I. Bavykina, A. Bento, A. Brown, C. Bucci, C. Ciemniak, C. Coppi, G. Deuter, F. von Feilitzsch, D. Hauff, S. Henry, P. Huff, … 展开作者

R. F. Lang, G. Angloher, M. Bauer, I. Bavykina, A. Bento, A. Brown, C. Bucci, C. Ciemniak, C. Coppi, G. Deuter, F. von Feilitzsch, D. Hauff, S. Henry, P. Huff, J. Imber, S. Ingleby, C. Isaila, J. Jochum, M. Kiefer, M. Kimmerle, H. Kraus, J. -C. Lanfranchi, B. Majorovits, M. Malek, R. McGowan, V. B. Mikhailik, E. Pantic, F. Petricca, S. Pfister, W. Potzel, F. Pröbst, S. Roth, K. Rottler, C. Sailer, K. Schäffner, J. Schmaler, S. Scholl, W. Seidel, L. Stodolsky, A. J. B. Tolhurst, I. Usherov, W. Westphal

摘要:

CRESST实验在超低本底环境中监测了300 g CaWO_4晶体作为粒子相互作用靶。在本文中,我们分析的背景光谱记录的三个探测器在许多星期的数据。如果想要进一步降低背景水平,了解这些光谱是强制性的,并允许我们交叉检查检测器的校准。我们确定了各种来源,如固有的污染,由于原始放射性同位素和宇宙起源的活化的目标材料。特别地,我们从41-Ca的衰变中探测到一条3.6keV的X射线线,其活度为(26 \pm 4)μBq,对应于41-Ca/40-Ca=(2.2 \pm 0.3)\times 10^{-16}。

英文摘要:

The CRESST experiment monitors 300g CaWO_4 crystals as targets for particle interactions in an ultra low background environment. In this paper, we analyze the background spectra that are recorded by three detectors over many weeks of data taking. Understanding these spectra is mandatory if one wants to further reduce the background level, and allows us to cross-check the calibration of the detectors. We identify a variety of sources, such as intrinsic contaminations due to primordial radioisotopes and cosmogenic activation of the target material. In particular, we detect a 3.6keV X-ray line from the decay of 41-Ca with an activity of (26\pm4)μBq, corresponding to a ratio 41-Ca/40-Ca=(2.2\pm0.3)\times10^{-16}.

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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