Shell model study of Ca40 muon capture and the (0+,0keV)→(0-,2626 keV) axial charge transition

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Abstract

We report results from shell-model studies of muon capture on Ca40 to low-lying levels of K40. We discuss the comparison among calculated capture rates, measured capture rates, and analogous transitions in (e,e') scattering in terms of the particle-hole structure of the Ca40-K40 nuclei. We highlight the Ca40(0+,0)→K40(0-,2626) axial charge transition and its sensitivity to the induced pseudoscalar coupling gp of the proton's weak interaction. In addition, we address the hindrance of unique first-forbidden transitions due to particle-hole interactions and the emergence of allowed Gamow-Teller transitions due to ground-state correlations. Last, we examine the longitudinal alignment of K40 recoils following muon capture and discuss this possibility for independently determining the induced coupling gp.

Original languageEnglish
Article number025503
JournalPhysical Review C - Nuclear Physics
Volume74
Issue number2
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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