论文标题
搜索$^{106} $ cd的双β衰减，并带有丰富的$^{106} $ cdwo $ _4 $ Crystal Scintallator与CDWO $ _4 $ skintillation counters
Search for double beta decay of $^{106}$Cd with an enriched $^{106}$CdWO$_4$ crystal scintillator in coincidence with CdWO$_4$ scintillation counters
论文作者
论文摘要
对$^{106} $ CD的双β衰减过程的研究是通过使用$^{106} $ CD富含66％（$^{106} $ cdwo $ _4 $）的cadmium tungstate闪烁体进行的。在26033小时内积累的数据中未观察到效果。在$^{106} $ cd double beta衰减的$ \ lim t_ {1/2} {1/2} \ sim 10^{20} -10^{22} $ yr的级别上设置了新的改进的半寿命限制。 $^{106} $ cd捕获的两个中微子电子的限制捕获$^{106} $ pd，$^{106} $ pd，$ t^{2ν\ mathrm {ec}β^+} _ {1/2} _ {1/2} _ {1/2} \ geq2.1 \ geq2.1 \ \ \ \ \ \ \ \ \ \ \ \ yr，由分析由分析。 $^{106} $ cdwo $ _4 $数据与两个CDWO $ _4 $ counters中的能量版本511 KEV一致。敏感性接近衰减半衰期的理论预测，该预测范围内$ t_ {1/2} \ sim10^{21} -10^{22} $ yr。 $^{106} $ pd的2718 keV激发状态的共振中性双电子捕获在$ t^{0ν\ mathrm {2k}} _ {1/2} _ {1/2}
Studies on double beta decay processes in $^{106}$Cd were performed by using a cadmium tungstate scintillator enriched in $^{106}$Cd at 66% ($^{106}$CdWO$_4$) with two CdWO$_4$ scintillation counters (with natural Cd composition). No effect was observed in the data accumulated over 26033 h. New improved half-life limits were set on the different channels and modes of the $^{106}$Cd double beta decay at level of $\lim T_{1/2}\sim 10^{20}-10^{22}$ yr. The limit for the two neutrino electron capture with positron emission in $^{106}$Cd to the ground state of $^{106}$Pd, $T^{2ν\mathrm{EC}β^+}_{1/2}\geq2.1\times 10^{21}$ yr, was set by the analysis of the $^{106}$CdWO$_4$ data in coincidence with the energy release 511 keV in both CdWO$_4$ counters. The sensitivity approaches the theoretical predictions for the decay half-life that are in the range $T_{1/2}\sim10^{21}-10^{22}$ yr. The resonant neutrinoless double-electron capture to the 2718 keV excited state of $^{106}$Pd is restricted at the level of $T^{0ν\mathrm{2K}}_{1/2}\geq2.9\times10^{21}$ yr
