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

为了研究中微子对无中微子双β衰变(DBD)的响应，本项目提出了测量几种丰化同位素上的普通Muon俘获(OMC)，即136-Ba、76-Se和96-Mo。这项工作扩展了我们的DBD子核OMC测量程序，旨在改进对中微子BB衰变过程的核矩阵元(NME)的计算，以及我们对这一过程中g_A猝灭的理解。实验期间将研究OMC的Muon绝对寿命和放射性产生率。高纯度的Ge探测器将被用来记录Muon捕获后伽马射线的能量和时间分布。测量的绝对寿命和相对强度分布将证实绝对俘获强度是激发能量的函数，并有助于将壳层模型计算扩展到重DBD同位素质量区域和超新星研究。

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.