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arXiv 1108.2771physics.ins-detnucl-ex
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富集116 CdWO_4晶体闪烁器的低本底探测器用于探测116 Cd的双β衰变

Low background detector with enriched 116CdWO4 crystal scintillators to search for double beta decay of 116Cd

A. S. Barabash, P. Belli, R. Bernabei, R. S. Boiko, F. Cappella, V. Caracciolo, D. M. Chernyak, R. Cerulli, F. A. Danevich, M. L. Di Vacri, A. E. Dossovitskiy, … 展开作者

A. S. Barabash, P. Belli, R. Bernabei, R. S. Boiko, F. Cappella, V. Caracciolo, D. M. Chernyak, R. Cerulli, F. A. Danevich, M. L. Di Vacri, A. E. Dossovitskiy, E. N. Galashov, A. Incicchitti, V. V. Kobychev, S. I. Konovalov, G. P. Kovtun, V. M. Kudovbenko, M. Laubenstein, A. L. Mikhlin, S. Nisi, D. V. Poda, R. B. Podviyanuk, O. G. Polischuk, A. P. Shcherban, V. N. Shlegel, D. A. Solopikhin, Yu. G. Stenin, V. I. Tretyak, V. I. Umatov, Ya. V. Vasiliev, V. D. Virich

摘要:

采用低热梯度提拉法生长了质量为1868 g的$^{116}$ Cd含量为82%的钨酸镉晶体。镉的同位素组成和晶体的痕量污染估计高分辨率电感耦合等离子体质谱。对从晶锭生产的晶体晶体衍射器进行表征,包括透射率和能量分辨率的测量。研制了一种由两个$^{116}$ CdWO $_4$晶体闪烁体(586 g和589 g)组成的低本底闪烁探测器。该探测器在INFN(意大利)的Gran Sasso国家实验室的地下深处运行了1727小时,从而可以估计浓缩晶体蒸发器的放射性污染。借助超低背景高纯锗$γ$检测器测试第三$^{116}$ CdWO $_4$样品(326 g)的放射性纯度。用蒙特卡罗模拟了$^{116}$ Cd中的$β$双衰变过程,并对寻找$^{116}$ Cd的$β$双衰变实验的灵敏度进行了估算.

英文摘要:

A cadmium tungstate crystal boule enriched in $^{116}$Cd to 82% with mass of 1868 g was grown by the low-thermal-gradient Czochralski technique. The isotopic composition of cadmium and the trace contamination of the crystal were estimated by High Resolution Inductively Coupled Plasma Mass-Spectrometry. The crystal scintillators produced from the boule were subjected to characterization that included measurements of transmittance and energy resolution. A low background scintillation detector with two $^{116}$CdWO$_4$ crystal scintillators (586 g and 589 g) was developed. The detector was running over 1727 h deep underground at the Gran Sasso National Laboratories of the INFN (Italy), which allowed to estimate the radioactive contamination of the enriched crystal scintillators. The radiopurity of a third $^{116}$CdWO$_4$ sample (326 g) was tested with the help of ultra-low background high purity germanium $γ$ detector. Monte Carlo simulations of double $β$ processes in $^{116}$Cd were used to estimate the sensitivity of an experiment to search for double $β$ decay of $^{116}$Cd.

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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