Gamma-ray and conversion-electron spectroscopy have established the existence of a 2.29(1) s, Kπ=0+, isomeric state in neutron-rich Tm174. The isomer deexcites via 100- and 152-keV electromagnetic transitions. First results from a newly commissioned Si(Li) detector array have established their M1 and E3 multipolarities, respectively. The single-particle configurations of the excited states suggest that the E3 transition originates from a πh11/2-1→πd3/2 configuration change, whereas the M1 transition occurs between members of a Gallaghar-Moszkowski doublet. From the measured half-life, the deduced B(E3) value of 0.024(2) W.u. is highly hindered. The reported measurements resolve ambiguities in the previously proposed β decay scheme of Er174 to Tm174. © 2006 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review C - Nuclear Physics
Chakrawarthy, R., Walker, P., Ressler, J., Zganjar, E., Ball, G., Smith, M., Andreyev, A., Ashley, S., Austin, R., Bandyopadhyay, D., Becker, J., Carroll, J., Cross, D., Gohlke, D., Daoud, J., Garrett, P., Grinyer, G., Hackman, G., Jones, G., Kanungo, R., Kulp, W., Litvinov, Y., Morton, A., Mills, W., Pearson, C., Propri, R., Svensson, C., Wheeler, R., & Williams, S. (2006). Kπ = 0 + 2.29 s isomer in neutron-rich Tm174. Physical Review C - Nuclear Physics, 73 (2) https://doi.org/10.1103/PhysRevC.73.024306