Muon capture by 3He nuclei followed by proton and deuteron production

Abstract

The paper describes an experiment aimed at studying muon capture by ${}^3\mathrm{He}$ nuclei in pure ${}^3\mathrm{He}$ and ${\mathrm{D}}_2+{}^3\mathrm{He}$ mixtures at various densities. Energy distributions of protons and deuterons produced via ${\mu }^{-}+{}^3\mathrm{He}\to p+n+n+{\nu }_{\mu }$ and ${\mu }^{-}+{}^3\mathrm{He}\to d+n+{\nu }_{\mu }$ are measured for the energy intervals $10-49$ MeV and $13-31$ MeV, respectively. Muon capture rates, ${\lambda }_{\mathrm{cap}}^p(\Delta E_p)$ and ${\lambda }_{\mathrm{cap}}^d(\Delta E_d)$ are obtained using two different analysis methods. The least--squares methods gives ${\lambda }_{\mathrm{cap}}^p=(36.7\pm 1.2)s^{-1}$, ${\lambda }_{\mathrm{cap}}^d=(21.3\pm 1.6)s^{-1}$. The Bayes theorem gives ${\lambda }_{\mathrm{cap}}^p=(36.8\pm 0.8)s^{-1}$, ${\lambda }_{\mathrm{cap}}^d=(21.9\pm 0.6)s^{-1}$. The experimental differential capture rates, $d{\lambda }_{\mathrm{cap}}^p(E_p)/d{E}_p$ and $d{\lambda }_{\mathrm{cap}}^d(E_d)/d{E}_d$, are compared with theoretical calculations performed using the plane--wave impulse approximation (PWIA) with the realistic NN interaction Bonn B potential. Extrapolation to the full energy range yields total proton and deuteron capture rates in good agreement with former results.

17 pages, 13 figures, accepted for publication in PRA

References in corpus (6)

• Benchmark Calculations for the Triton Binding Energy for Modern NN Forces and the pi-pi Exchange Three-Nucleon Force
• A Precision Measurement of Nuclear Muon Capture on 3He
• Nuclear muon capture by 3He: meson exchange currents for the triton channel
• Muon Catalyzed Fusion in 3 K Solid Deuterium
• Final state interaction effects in mu-capture induced two-body decay of 3He
• Muon transfer from deuterium to helium

Cited by in corpus (2)

• Break-up channels in muon capture on 3He
• Muon Capture on Deuteron and 3He: A Personal Review