2013/02/26 by S. N. Gninenko, Gninenko, S. N.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #hep-ex #nucl-ex #nucl-th
paper · pdf · doi:10.48550/arxiv.1302.6398
7 pp, 3 figs, title modified, fig. 3 and typos corrected, refs. added
arxiv created 2013/03/03 · arxiv updated 2013/03/05
In a typical experiment the nuclear μ-capture rate is determined from measurements of the time constant of the muon decay exponential in a target. We propose a new approach for the evaluation of the μ-capture rate, which is based on direct measurements of the μ- disappearance rate in the target. Considering, as an example, the reaction of μ-capture on proton, we demonstrate that measurements of the μ- disappearance at different values of the hydrogen gas pressure in the target could be used to avoid a pressure-dependent correction and determine the "vacuum" μp -> νn reaction rate with accuracy better than 10-2 after extrapolation to zero gas density. The proposed method could be used to perform precision measurements of the μ- capture rate on different types of nuclei in one experiment.