T. J. Stocki

Neutron-induced peaks in Ge detectors from evaporation neutrons

Abstract We have studied the peak shapes at 596 and 691 keV resulting from fast neutron interactions inside germanium detectors. We have used neutrons from a 252 Cf source, as well as from the 28 Si(μ − , nv), and 209 Bi(π − , xn) reactions to compare the peaks and to check for a dependence of peak shape on the incoming neutron energy. In our investigation, no difference between these three measurements has been observed. In a comparison of these peak shapes with other studies, we found similar results to ours except for those measurements using monoenergetic neutrons in which a significant variation with neutron energy has been observed.

Hyperfine transition in light muonic atoms of odd Z

The hyperfine (hf) transition rates for muonic atoms have been remeasured for select light nuclei, using neutron detectors to evaluate the time dependence of muon capture. For

Gamma‐rays from muon capture in Al, Si, natural Ca, Fe, Ni, I, Au, and Bi

{}^{19}\mathrm{F}{\ensuremath{\Lambda}}_{h}=5.6(2) \ensuremath{\mu}{\mathrm{s}}^{\ensuremath{-}1}

Recoil alignment in muon capture onN14

for the hf transition rate, a value that is considerably more accurate than previous measurements. Results are also reported for Na, Al, P, Cl, and K.

Recoil alignment in muon capture on {sup 14}N

A significant improvement has been made in the identification of gamma‐rays from muon capture in Al, Si, natural Ca, I, Au, Bi, and to a lesser extent for Fe, and Ni. For calcium, capture was observed in 44Ca and even 42Ca, as well as the dominant 40Ca. The (μ−, ν) reaction was clearly observed in 27Al, 28Si, and 40Ca, but, as in the past, no clear identification was made in heavier elements. The (μ−, νn) reaction was clearly observed in all nuclei, and the intensity pattern of the gamma‐rays corresponds better to the pattern observed in the (γ,p) reaction rather than to spectroscopic factors from the (d,3He) or (t,α) reactions. Some (μ−, ν2n) and other reactions have been observed at a lower yield.

Muon capture on 35 Cl

We report a measurement of the longitudinal alignment

Dependence on neutron energy of neutron-induced peaks in Ge detectors

A_L

Measurement of partial muon capture rates in 1 s − 0 d shell nuclei

of the recoil nucleus in the

gamma rays from muon capture in Al-27 and natural Si

\mu^- + ^{14}

Gamma rays from muon capture in 14N

N