Half-life and spin of 60Mn^g
  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. 
S.N. Liddick, P.F. Mantica, B.A. Brown, M.P. Carpenter, A.D. Davies,   M. Horoi, R.V.F. Janssens, A.C. Morton, W.F. Mueller,...