AB - 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 ? and ? decay modes. The large spin change required to decay via ?-ray emission incurs a lifetime long enough for ? decay to compete. The ? decay has an energy of 8644(11) keV, which is among the highest observed in the region, a partial half-life of 440(70) ?s and changes the spin by 11h. In this paper, additional evidence supporting the assignment of this ? decay to the high-spin isomer in 158Ta will be presented. AU - Carroll, RJ AU - Page, RD AU - Joss, DT AU - Uusitalo, J AU - Darby, IG AU - Andgren, K AU - Cederwall, B AU - Eeckhaudt, S AU - Grahn, T AU - Gray-Jones, C AU - Greenlees, PT AU - Hadinia, B AU - Jones, PM AU - Julin, R AU - Juutinen, S AU - Leino, M AU - Leppänen, AP AU - Nyman, M AU - O'Donnell, D AU - Pakarinen, J AU - Rahkila, P AU - Sandzelius, M AU - Sarén, J AU - Scholey, C AU - Seweryniak, D AU - Simpson, J DA - 2015/03/01 DO - 10.5506/APhysPolB.46.695 EP - 698 JO - Acta Physica Polonica B PY - 2015/03/01 SP - 695 TI - Competing decay modes of a high-spin isomer in the proton-unbound nucleus 158Ta VL - 46 Y1 - 2015/03/01 Y2 - 2024/03/28 ER -