High-Precision Half-life Measurement for the Superallowed Fermi ${\beta }^{+}$ Emitter ${}^{22}$Mg

Abstract

A high-precision half-life measurement for the superallowed Fermi ${\beta }^{+}$ emitter ${}^{22}$Mg was performed at the TRIUMF-ISAC facility using a 4$\pi$ proportional gas counter. The result of $T_{1/2}=3.87400\pm 0.00079$ s is a factor of 3 more precise than the previously adopted world average and resolves a discrepancy between the two previously published ${}^{22}$Mg half-life measurements.

arXiv comment7 pages, 9 figures

References in corpus (17)

• Superallowed 0+ to 0+ nuclear beta decays: A new survey with precision tests of the conserved vector current hypothesis and the standard model
• Superallowed 0+ --> 0+ nuclear beta decays: 2014 critical survey, with precise results for Vud and CKM unitarity
• An improved calculation of the isospin-symmetry-breaking corrections to superallowed Fermi beta decay
• Superallowed nuclear beta decays: A critical survey with tests of CVC and the standard model
• Calculated corrections to superallowed Fermi beta decay: New evaluation of the nuclear-structure-dependent terms
• Isospin-mixing corrections for fp-shell Fermi transitions
• Isospin corrections for superallowed Fermi beta decay in self-consistent relativistic random phase approximation approaches
• Comparative tests of isospin-symmetry-breaking corrections to superallowed 0+-to-0+ nuclear beta decay
• Isospin-symmetry-breaking corrections to superallowed Fermi beta decay: Formalism and schematic models
• Coulomb corrections to superallowed beta decay in nuclei
• Isospin mixing in nuclei within the nuclear density functional theory
• Microscopic calculations of isospin-breaking corrections to superallowed beta-decay
• Isospin-symmetry-breaking corrections to superallowed Fermi beta decay: Radial excitations
• Isospin-breaking corrections to superallowed Fermi beta-decay in isospin- and angular-momentum-projected nuclear Density Functional Theory
• High Precision Measurement of the Superallowed 0^+ to 0^+ Beta Decay of ^{22}Mg
• The GRIFFIN Data Acquisition System
• The beta decay of 38Ca: Sensitive test of isospin symmetry-breaking corrections from mirror superallowed 0+-to-0+ transitions

Cited by in corpus (2)

• The GRIFFIN Facility for Decay-Spectroscopy Studies at TRIUMF-ISAC
• High-precision $Q_{EC}$-value measurement of the superallowed ${\beta }^{+}$ emitter ${}^{22}$Mg and an evaluation of the $A=22$ isobaric triplet