1. Isomer spectroscopy in No-254
- Author
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Herzberg, R-D, Greenlees, P. T., Butler, P. A., Jones, G. D., Darby, I. G., Eeckhaudt, S., Grahn, T., Gray-Jones, C., Hessberger, F. P., Jones, P., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Leppanen, A-P, Moon, S., Nyman, M., Page, R. D., Pakarinen, J., Pritchard, A., Rahkila, P., Sandzelius, Mikael, Saren, J., Scholey, C., Steer, A., Uusitalo, J., Venhart, M., Herzberg, R-D, Greenlees, P. T., Butler, P. A., Jones, G. D., Darby, I. G., Eeckhaudt, S., Grahn, T., Gray-Jones, C., Hessberger, F. P., Jones, P., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Leppanen, A-P, Moon, S., Nyman, M., Page, R. D., Pakarinen, J., Pritchard, A., Rahkila, P., Sandzelius, Mikael, Saren, J., Scholey, C., Steer, A., Uusitalo, J., and Venhart, M.
- Abstract
Isomeric states in No-254 were investigated using a calorimetric method. Two different isomers were found with half-lives of T-1/2 = 266 +/- 2 ms and T-1/2 = 184 +/- 3 mu s, respectively. The dominant decay path of the 184 mu s isomer proceeds via states feeding the longer-lived 266 ms isomer. The 266 ms isomer in turn decays via a two-quasi-particle K = 3 band to the ground-state band. The full decay path was observed with the GREAT spectrometer located at the focal plane of the gas-filled separator RITU at the Accelerator Laboratory in Jyvskyl. This work sheds light on the two-quasi-particle structure in this transfermium nucleus., QC 20110927
- Published
- 2006
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