$β^{+}$ Decay Partial Half-Life of $^{54} Mn$ and Cosmic Ray Chronometry

9 March 1998

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 80 (10) , 2085-2088
https://doi.org/10.1103/physrevlett.80.2085

Abstract

The weak

β^{+}

decay of the astrophysically significant radioisotope

^{54} Mn

has been observed. The energies of positrons from a chemically purified

^{54} Mn

source were measured using the APEX spectrometer at Argonne National Laboratory. We deduce a

β^{+}

decay branch of

(1.20 \pm 0.26) \times 10^{- 9}

, corresponding to a partial half-life of

(7.1 \pm 1.5) \times 10^{8} yr

. The implications of this value for cosmic-ray confinement times are discussed in light of recent satellite measurements of the cosmic-ray abundance of

^{54} Mn

Keywords

This publication has 15 references indexed in Scilit:

Galactic Cosmic‐Ray Manganese:UlyssesHigh Energy Telescope Results
The Astrophysical Journal, 1997
A solenoidal spectrometer for positron-electron pairs produced in heavy-ion collisions
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1996
Trigger processor for the APEX positron-electron spectrometer
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1995
Effective interactions for A = 41–66 nuclei
Nuclear Physics A, 1994
Proton Inelastic Scattering on ${}^{56}{Ni}$ in Inverse Kinematics
Physical Review Letters, 1994
Search for the $β^{+}$ decay of ${}^{54}{Mn}$
Physical Review C, 1993
The Mn-54 clock and its implications for cosmic-ray propagation and Fe isotope studies
The Astrophysical Journal, 1991
New effective interactions for the 0f1p shell
Nuclear Physics A, 1991
β+decay and cosmic-ray half-life ofMn54
Physical Review C, 1989
MANGANESE-54 and the Lifetime of Relativistic Cosmic Rays
The Astrophysical Journal, 1973

β+Decay Partial Half-Life of54Mnand Cosmic Ray Chronometry

Abstract

Keywords

$β^{+}$ Decay Partial Half-Life of $^{54} Mn$ and Cosmic Ray Chronometry