A value of 0.28 +/- 0.02 s has been deduced for the half-life of the ground state of 60Mn, in sharp contrast to the previously adopted value of 51 +/- 6 s. Access to the low-spin 60Mn ground state was accomplished via beta decay of the 0+ 60Cr parent nuclide. New, low-energy states in 60Mn have been identified from beta-delayed gamma-ray spectroscopy. The new, shorter half-life of 60Mn^g is not suggestive of isospin forbidden beta decay, and new spin and parity assignments of 1+ and 4+ have been adopted for the ground and isomeric beta-decaying states, respectively, of 60Mn.
@article{arxiv.nucl-ex/0604001,
title = {Half-life and spin of 60Mn^g},
author = {S. N. Liddick and P. F. Mantica and B. A. Brown and M. P. Carpenter and A. D. Davies and M. Horoi and R. V. F. Janssens and A. C. Morton and W. F. Mueller and J. Pavan and H. Schatz and A. Stolz and S. L. Tabor and B. E. Tomlin and M. Wiedeking},
journal= {arXiv preprint arXiv:nucl-ex/0604001},
year = {2008}
}
Comments
13 pages, 5 figures, Accepted for publication in Phys. Rev. C