OMC4DBD: ordinary muon capture studies for the matrix elements in double beta decays

OMC4DBD：双β衰变中基质元素的普通μ子捕获研究

• 批准号: 448829699
• 负责人: Professor Dr. Stefan Schönert
• 金额: --
• 依托单位: Joint Institute for Nuclear Research (JINR)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/448829699?language=en
• 关键词: OMC4DBD; ordinary; muon; capture; studies

In this project is proposed to measure the ordinary muon capture (OMC) on several enriched isotopes in order to investigate neutrino nuclear responses for neutrinoless double beta decay (DBD), namely 136-Ba, 76-Se and 96-Mo. This work extends our program of OMC measurements for daughter nuclei of DBD-nuclei aimed to improve calculations of nuclear matrix elements (NME) of neutrinoles bb-decay process as well as our understanding of g_A quenching in this process. The muon absolute lifetime and radioactive production rate for OMC will be studied during the experiment. High-purity Ge detectors will be used to register the energy and time distribution of gamma-rays, following muon capture. The measured absolute lifetime together with the relative strength distribution will confirm the absolute capture strength as a function of the excitation energy and will help to extend shell model calculations to the heavy DBD isotope mass region and Supernova studies.

在该项目中，建议测量几种富集同位素（即 136-Ba、76-Se 和 96-Mo）的普通 μ 子俘获（OMC），以研究中微子双 β 衰变（DBD）的中微子核反应。这项工作扩展了我们对 DBD 核子核的 OMC 测量计划，旨在改进中微子 bb 衰变过程的核基质元素 (NME) 的计算以及我们对该过程中 g_A 猝灭的理解。 实验期间将研究OMC的μ子绝对寿命和放射性生产率。高纯度Ge探测器将用于记录μ子捕获后伽马射线的能量和时间分布。测量的绝对寿命与相对强度分布一起将确认绝对捕获强度作为激发能量的函数，并将有助于将壳模型计算扩展到重 DBD 同位素质量区域和超新星研究。