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arXiv 2106.05862nucl-ex
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锇原子双β衰变的新实验极限

New experimental limits on double-beta decay of osmium

P. Belli, R. Bernabei, F. Cappella, V. Caracciolo, R. Cerulli, F. A. Danevich, A. Incicchitti, D. V. Kasperovych, V. V. Kobychev, G. P. Kovtun, N. G. Kovtun, M.… 展开作者

P. Belli, R. Bernabei, F. Cappella, V. Caracciolo, R. Cerulli, F. A. Danevich, A. Incicchitti, D. V. Kasperovych, V. V. Kobychev, G. P. Kovtun, N. G. Kovtun, M. Laubenstein, V. Merlo, D. V. Poda, O. G. Polischuk, A. P. Shcherban, S. Tessalina, V. I. Tretyak

摘要:

在I.N.F.N.的Gran Sasso国家实验室(LNGS)对$^{184}$ Os和$^{192}$ Os中的双β过程进行了超过15851小时的检索。采用118 g超纯锇样品安装在112 cm $^3$超低本底宽能锗探测器的端盖上。$^{184}$ Os中双电子捕获和电子捕获伴正电子发射的新限值设定为$\lim T_{1/2} \sim 10^{16}-10^{17}$年水平。特别地,$^{184}$ 0到$^{184}$ W的基态的$2ν$ 2K和$2ν$ KL衰变分别被限制为$T_{1/2}\geq3.0\times 10^{16}$ yr和$T_{1/2}\geq2.0\times 10^{16}$ yr。$^{192}$ Os双β衰变至$^{192}$ Pt第一激发能级的半衰期下限设定为$\lim T_{1/2}=2.0\times 10^{20}$ yr(90\%C. L.)。

英文摘要:

Double-beta processes in $^{184}$Os and $^{192}$Os were searched for over 15851 h at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. by using a 118 g ultra-pure osmium sample installed on the endcap of a 112 cm$^3$ ultra-low-background broad-energy germanium detector. New limits on double-electron capture and electron capture with positron emission in $^{184}$Os were set at the level of $\lim T_{1/2} \sim 10^{16}-10^{17}$ yr. In particular the $2ν$2K and $2ν$KL decays of $^{184}$Os to the ground state of $^{184}$W are restricted as $T_{1/2}\geq3.0\times 10^{16}$ yr and $T_{1/2}\geq2.0\times 10^{16}$ yr, respectively. A lower limit on the half-life for the double-beta decay of $^{192}$Os to the first excited level of $^{192}$Pt was set as $\lim T_{1/2}=2.0\times 10^{20}$ yr at 90\% C.L.

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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