## Abstract

We report measurements of the photon rates and energy spectra from inclusive radiative muon capture on three nickel isotopes using a photon pair spectrometer at the TRIUMF cyclotron. The values of [Formula Presented] the partial branching ratios of radiative muon capture for photon energies [Formula Presented] MeV, for [Formula Presented] were found to be (in units of [Formula Presented] [Formula Presented] and [Formula Presented] assuming a Fermi-gas photon spectral shape. The results reveal a significant isotope effect in the nickel branching ratios and a simple empirical scaling of the present nickel and earlier nuclear [Formula Presented] data with neutron excess. Furthermore, the observed atomic mass and neutron excess dependence of the entire nuclear [Formula Presented] data set is well reproduced by a relativistic Fermi-gas calculation. The ability of the model to reproduce the variation of the [Formula Presented] data using the Goldberger-Treiman formula for [Formula Presented] suggests there is no compelling reason to invoke a more exotic [Formula Presented]-dependent renormalization of [Formula Presented].

Original language | English |
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Pages (from-to) | 1767-1776 |

Number of pages | 10 |

Journal | Physical Review C - Nuclear Physics |

Volume | 58 |

Issue number | 3 |

DOIs | |

State | Published - 1998 |

## ASJC Scopus subject areas

- Nuclear and High Energy Physics