21 research outputs found
Muon capture by 3He nuclei followed by proton and deuteron production
The paper describes an experiment aimed at studying muon capture by
nuclei in pure and mixtures at various densities. Energy distributions of
protons and deuterons produced via and are measured for the
energy intervals MeV and MeV, respectively. Muon capture
rates, and are obtained using two different analysis methods. The
least--squares methods gives , . The Bayes theorem
gives ,
. The experimental
differential capture rates, and , 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.Comment: 17 pages, 13 figures, accepted for publication in PR
Muon capture by ÂłHe nuclei followed by proton and deuteron production
The paper describes an experiment aimed at studying muon capture by He nuclei in pure ÂłHe and Dâ+ÂłHe mixtures at various densities. Energy distributions of protons and deuterons produced via ”â+ÂłHe-->p + n + n + Μ” and ”â+ÂłHe-->d + n + Μ” are measured for the energy intervals 10â49 MeV and 13â31 MeV, respectively. Muon capture rates lambdacapp(ÎEp) and lambdacapd(ÎEd) are obtained using two different analysis methods. The least-squares methods give lambdacapp = (36.7±1.2) sâ1, lambdacapd = (21.3±1.6) sâ1. The Bayes theorem gives lambdacapp = (36.8±0.8) sâ1, lambdacapd = (21.9±0.6) sâ1. The experimental differential capture rates, dlambdacapp(Ep)/dEp and dlambdacapd(Ed)/dEd, are compared with theoretical calculations performed using the plane-wave impulse approximation with the realistic nearest-neighbor interaction Bonn B potential. Extrapolation to the full energy range yields total proton and deuteron capture rates in good agreement with former result
Experimental study of ”-atomic and ”-molecular processes in pure helium and deuterium-helium mixtures
We present experimental results of ”-atomic and ”-molecular processes induced by negative muons in pure helium and helium-deuterium mixtures. The experiment was performed at the Paul Scherrer Institute (Switzerland). We measured relative intensities of muonic x-ray K series transitions in (”3,4He)* atoms in pure helium as well as in helium-deuterium mixtures. The d”³He radiative decay probabilities for two different helium densities in D2+³He mixture were also determined. Finally, the qHe1s probability for a d” atom formed in an excited state to reach the ground state was measured and compared with theoretical calculations using a simple cascade model