We report yields for 38 γ-ray lines and 29 (μ- ,ν) transitions following negative muon capture on 24Mg, 28Si, 31P, and 32S. Our results substantially increase the world data set for partial (μ- ,ν) transitions on 1s-0d shell nuclei. They also resolve a number of inconsistencies between previously published γ-ray yields and accepted γ-decay branching ratios. We compare the measured capture rates for the allowed Gamow-Teller (GT) transitions (supplemented with earlier 23Na data) with a shell model calculation using the full 1s-0d space and universal SD interaction. We find a "best fit" value of the effective weak axial coupling of g̃a = - 0.91+0.15-0.17, fair agreement for the per-target summed GT capture rates, but poor agreement for the individual GT capture rates. By replacing the shell model στ± matrix element values with experimentally determined ςτ± matrix element values, improved predictions for the individual GT capture rates are obtained. Last, we comment on recent determinations of the weak coupling gp via muon capture on 1s-0d shell nuclei.
|Number of pages||4995105|
|Journal||Physical Review C - Nuclear Physics|
|State||Published - Nov 1999|
Bibliographical noteFunding Information:
From the Department of Obstetrics and Gynecology, The Milton S. Hershey Medical Center, The Pennsylvania State University. Supported in part by Public Health Service Grant GM 23134. Sponsored by the Society for Gynecologic Investigation. Reprint requests: Robert P. Lorenz, M.D., Chief; Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, William Beaumont Hospital, 3601 West 13 Mile Road, Royal Oak, M1
ASJC Scopus subject areas
- Nuclear and High Energy Physics