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arXiv 1002.2862nucl-ex
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用NEMO-3探测器研究双β衰变

Investigation of double beta decay with the NEMO-3 detector

A. S. Barabash, V. B. Brudanin, the NEMO Collaboration

摘要:

双β衰变实验NEMO~3从2003年2月开始进行。本实验的目的是寻找无中微子($0νββ$)衰变,并研究七种不同同位素富集样品($^{100}$ Mo,$^{82}$ Se,$^{48}$ Ca,$^{96}$ Zr,$^{116}$ Cd,$^{130}$ Te和$^{150}$ Nd)中的两个中微子双β衰变衰变。在分析对应于3.75年的数据后,在$^{100}$ Mo和$^{82}$ Se样品中没有发现$0νββ$衰变的证据。分别为$1.1\cdot 10^{24}$ y和$3.6\cdot 10^{23}$ y。此外,对于$0νββ$,在90% C.L.下衰减的限度如下:获得了:$> 1.3 \cdot 10^{22}$ y($^{48}$ Ca)、$> 9.2 \cdot 10^{21}$ y($^{96}$ Zr)和$> 1.8 \cdot 10^{22}$ y($^{150}$ Nd)。精确测量所有研究同位素的$2νββ$衰变半衰期值。

英文摘要:

The double beta decay experiment NEMO~3 has been taking data since February 2003. The aim of this experiment is to search for neutrinoless ($0νββ$) decay and investigate two neutrino double beta decay in seven different isotopically enriched samples ($^{100}$Mo, $^{82}$Se, $^{48}$Ca, $^{96}$Zr, $^{116}$Cd, $^{130}$Te and $^{150}$Nd). After analysis of the data corresponding to 3.75 y, no evidence for $0νββ$ decay in the $^{100}$Mo and $^{82}$Se samples was found. The half-life limits at the 90% C.L. are $1.1\cdot 10^{24}$ y and $3.6\cdot 10^{23}$ y, respectively. Additionally for $0νββ$ decay the following limits at the 90% C.L. were obtained, $> 1.3 \cdot 10^{22}$ y for $^{48}$Ca, $> 9.2 \cdot 10^{21}$ y for $^{96}$Zr and $> 1.8 \cdot 10^{22}$ y for $^{150}$Nd. The $2νββ$ decay half-life values were precisely measured for all investigated isotopes.

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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