Searches for Neutrinoless Double Beta Decay with Bolometric Detectors

用测辐射热探测器搜索无中微子双贝塔衰变

• 批准号: 1314881
• 负责人: Yury Kolomensky
• 金额: $ 54.15万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-15 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1314881&HistoricalAwards=false
• 关键词: Searches; Neutrinoless; Double; Beta; Decay

This award will support a program of research in neutrinoless double beta decay (NDBD). It has two complementary parts. First is the development of the next-generation CUORE (Cryogenic Underground Observatory for Rare Events) detector, including the operations of the first production tower CUORE-0 and the subsequent data analysis. The second goal is the R&D towards a large generic bolometer-based double-beta decay detector. The observation of exotic NDBDs would indicate that neutrinos are Majorana particles, i.e. they are their own anti-particles. The rate of the process is sensitive to the effective neutrino mass. CUORE promises to be one of the most sensitive NDBD experiments this decade. This group is responsible for providing 1250 Neutron Transmutation Doped (NTD) thermistors that will measure the small temperature rise induced by single decays in the tellurium dioxide crystals. They are performing the quality control measurements of the NTD properties in the newly commissioned cryostat on the Berkeley campus and are also sharing responsibilities for detector assembly and integration. For Broader Impacts, the group provides a unique educational and research environment for the junior scientists, including graduate and undergraduate students. The bolometric detectors bring together many experimental techniques from low temperature physics, solid-state physics, and particle and nuclear physics. The interactions with the local experts in these areas benefit both this project and the local scientific community as a whole.

该奖项将支持无中微子双β衰变（NDBD）的研究计划。它有两个互补的部分。首先是下一代CUORE（罕见事件低温地下观测站）探测器的开发，包括第一个生产塔CUORE-0的运行和随后的数据分析。第二个目标是研发大型通用的基于测辐射热计的双β衰变探测器。对奇异NDBDs的观测表明中微子是马约拉纳粒子，即它们是自己的反粒子。这个过程的速率对有效中微子质量很敏感。CUORE有望成为近十年来最敏感的NDBD实验之一。该小组负责提供1250个中子嬗变掺杂（NTD）热敏电阻，用于测量二氧化碲晶体中单次衰变引起的微小温升。他们正在伯克利校园新委托的低温恒温器中执行NTD属性的质量控制测量，并分担探测器组装和集成的责任。对于更广泛的影响，该集团提供了一个独特的教育和研究环境的初级科学家，包括研究生和本科生。测辐射热探测器汇集了来自低温物理、固态物理、粒子和核物理的许多实验技术。与这些领域的当地专家的互动使该项目和整个当地科学界受益。