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- Title
COMPETING DECAY MODES OF A HIGH-SPIN ISOMER IN THE PROTON-UNBOUND NUCLEUS <sup>158</sup>Ta.
- Authors
CARROLL, R. J.; PAGE, R. D.; JOSS, D. T.; UUSITALO, J.; DARBY, I. G.; ANDGREN, K.; CEDERWALL, B.; EECKHAUDT, S.; GRAHN, T.; GRAY-JONES, C.; GREENLEES, P. T.; HADINIA, B.; JONES, P. M.; JULIN, R.; JUUTINEN, S.; LEINO, M.; LEPPÄNEN, A.-P.; NYMAN, M.; O'DONNELL, D.; PAKARINEN, J.
- Abstract
An isomeric state at high spin and excitation energy was recently observed in the proton-unbound nucleus 158Ta. This state was observed to decay by both α and γ decay modes. The large spin change required to decay via γ-ray emission incurs a lifetime long enough for α decay to compete. The α decay has an energy of 8644(11) keV, which is among the highest observed in the region, a partial half-life of 440(70) µs and changes the spin by 11ħ. In this paper, additional evidence supporting the assignment of this α decay to the high-spin isomer in 158Ta will be presented.
- Subjects
ISOMERS; EXCITATION energy (In situ microanalysis); TANTALUM isotopes; HALF-life (Nuclear physics); NUCLEAR spin
- Publication
Acta Physica Polonica B, 2015, Vol 46, Issue 3, p695
- ISSN
0587-4254
- Publication type
Article
- DOI
10.5506/APhysPolB.46.695