Abstract
First result of experiment for searching of 2K-capture of Xe-124 with the large-volume copper proportional counter is given. The 12 litre sample with 63.3% (44 g) of Xe-124 was used in measurements. The limit on the half-life of Xe-124 with regard to 2K(2\nu)-capture for the ground state of Te-124 has been found: T_{1/2} > 4.67x10^{20} y (90% C.L.). A sample with volume 52 L comprising of Xe-124 (10.6 L - 58.6 g) and Xe-126 (14.1 L - 79.3 g) will used at the next step of the experiment to increase a sensitivity of 2K-caption of Xe-124 registration. In this case sensitivity to the investigated process will be at the level of S=1.46 x 10^{21} y (90% C.L.) for 1 year measurement.
Abstract (translated by Google)
给出了用大容量铜正比计数器搜索Xe-124的2K捕获实验的初步结果。测量中使用具有63.3％（44g）Xe-124的12升样品。已经发现对于Te-124的基态的2K（2’） - 捕获的Xe-124的半衰期的限制已经被发现：T_ {1/2}> 4.67x10 ^ {20} y（90 ％CL）。在实验的下一个步骤中使用包含Xe-124（10.6L-58.6g）和Xe-126（14.1L-79.3g）的体积52L的样品以增加Xe-124的2K-标题的灵敏度注册。在这种情况下，对被调查过程的敏感度将在S = 1.46×10 ^ {21} y（90％C.L.）的水平下进行1年的测量。
URL
https://arxiv.org/abs/1404.5530