Fine structure in the alpha decay of high-spin isomers in Lu-155 and Hf-156
- Parr, E
- Page, RD
- Joss, DT
- Ali, FA
- Auranen, K
- Capponi, L
- Grahn, T
- Greenlees, PT
- Henderson, J
- Herzan, A
- Jakobsson, U
- Julin, R
- Juutinen, S
- Konki, J
- Labiche, M
- Leino, M
- Mason, PJR
- McPeake, C
- O'Donnell, D
- Pakarinen, J
- Papadakis, P
- Partanen, J
- Peura, P
- Rahkila, P
- Revill, JP
- Ruotsalainen, P
- Sandzelius, M
- Saren, J
- Scholey, C
- Simpson, J
- Smith, JF
- Smolen, M
- Sorri, J
- Stolze, S
- Thornthwaite, A
- Uusitalo, J
DOIAbstract
Fine structure in the α decay of high-spin isomers in Lu155(25/2-) and Hf156(8+) has been studied for the first time using αγ-coincidence analysis. Three new α decays from Lu155(25/2-) and two from Hf156(8+) have been identified, populating seniority s>1 states in the N=82 nuclei Tm151 and Yb152, respectively. The reduced hindrance factors of the α decays support the previous configuration assignments of the populated states. This is the first observation of states with excitation energy greater than 1.5 MeV being populated following α decay in nuclei outside of the Pb208 region
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