Abstract
This is a brief review on ordinary muon capture (OMC) experiments at Research Center for Nuclear Physics (RCNP) Osaka University relevant for the study of double beta decays (DBDs) and astro anti-neutrinos (neutrino) nuclear responses. OMC usually leaves the nucleus in highly excited unbound state. OMC is a charge exchange reaction via the charged weak boson as given by (μ,vμ) reactions with μ and vμ being the muon and muon neutrino. Subjects discussed include 1) unique features of OMC for studying DBDs and astro anti-neutrino (neutrino) nuclear responses, 2) experiments of OMCs on 100Mo and natMo to study neutrino nuclear responses for DBDs and astro anti-neutrinos, 3) impact of the OMC results on neutrino nuclear responses for DBDs and astro anti-neutrinos. Remarks and perspectives on OMC experiments for neutrino nuclear responses are briefly described.
Highlights
Double beta decays (DBDs) and astro neutrinos and anti-neutrinos are of current interest
Neutrino nuclear responses studied by these light-ion Charge exchange reactions (CERs) are discussed in the recent review articles and references therein (Ejiri, 2000; Vergados et al, 2012; Frekers and Alanssari, 2018; Ejiri et al, 2019; Ejiri, 2020)
Ordinary muon capture reactions (OMC), where a negative muon in an atomic orbit is captured into the nucleus has been shown useful for studying the τ+-side responses, and the Mi+ nuclear matrix element (NME) at Research Center for Nuclear Physics (RCNP) Osaka University (Hashim, 2015; Hashim et al, 2018; Hashim and Ejiri, 2019)
Summary
Double beta decays (DBDs) and astro (solar and supernova) neutrinos and anti-neutrinos are of current interest. Charge exchange reactions (CERs) using light ions have been used to study the neutrino nuclear responses. Neutrino nuclear responses studied by these light-ion CERs are discussed in the recent review articles and references therein (Ejiri, 2000; Vergados et al, 2012; Frekers and Alanssari, 2018; Ejiri et al, 2019; Ejiri, 2020). Ordinary muon capture reactions (OMC), where a negative muon in an atomic orbit is captured into the nucleus has been shown useful for studying the τ+-side responses, and the Mi+ NMEs at Research Center for Nuclear Physics (RCNP) Osaka University (Hashim, 2015; Hashim et al, 2018; Hashim and Ejiri, 2019).
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