US-Russian Cooperative Program in Double Beta Decay Studies

9500727莫斯科理论和实验物理研究所最近加入了国际锗实验的第二阶段。他们贡献的9公斤同位素浓缩锗(86%76Ge，价值约1500万美元)正被用于探测器，以搜索无中微子双β衰变(超出标准模型的物理学)。IGEX第二阶段涉及南卡罗来纳大学、哥伦比亚大学、莫斯科核研究所、巴特尔太平洋西北实验室以及明尼苏达大学和萨拉戈萨大学(西班牙)。到目前为止，已经制作了3个约0.7公斤的小探测器和两个大探测器(2.1公斤)。他们现在正在西班牙的Carfrc隧道中运营。另一个大型探测器正在准备中。为了进行有意义的合作，ITEP参与者必须参与Carfrc实验的所有阶段。这项请求是为了支持每年3名国际技援计划协作者进行3次为期3个月的工作访问。俄罗斯非常困难的条件使IGEX成为大约10名俄罗斯物理学家的主要科学活动。如果没有INR和ITEP的慷慨捐款，这项实验在财务上是不可能的。***

9500727 Avignone The Institute for Theoretical and Experimental Physics in Moscow (ITEP) recently joined Phase-II of the International Germanium Experiment (IGEX). Their contribution of 9kg of isotopically enriched germanium (86% 76Ge valued at about 15 M$) is being used in detectors to search for neutrinoless double beta decay (physics beyond the standard model). IGEX Phase-II involves the University of South Carolina,k Columbia the Institute for Nuclear Research Moscow, Battelle Pacific Northwest Laboratory, and the Universities of Minnesota and Zaragoza (Spain). Thus far, 3 small detectors about (0.7 kg) and two large detectors (2.1kg) have been fabricated. They are now operating in the Carfranc tunnel in Spain. Another large detector is in preparation. For a meaningful collaboration, the ITEP participants must be involved in all phases of the experiment at Carfranc. This request is for support for three 3-months working visits for 3 ITEP collaborators per year. Very difficult conditions in Russia make IGEX the major scientific activity for about 10 Russian Physicists. This experiment would have been financially impossible without the generous contributions of INR and ITEP. ***