Competing decay modes of a high-spin isomer in the proton-unbound nucleus 158Ta

R.J. Carroll; R.D. Page; D.T. Joss; J. Uusitalo; I.G. Darby; K. Andgren; B. Cederwall; S. Eeckhaudt; T. Grahn; C. Gray-Jones; P.T. Greenlees; B. Hadinia; P.M. Jones; R. Julin; S. Juutinen; M. Leino; A.-P. Leppänen; M. Nyman; D. O'Donnell; J. Pakarinen; P. Rahkila; M. Sandzelius; J. Sarén; C. Scholey; D. Seweryniak; J. Simpson

doi:10.5506/APhysPolB.46.695

Competing decay modes of a high-spin isomer in the proton-unbound nucleus 158Ta

R.J. Carroll, R.D. Page, D.T. Joss, J. Uusitalo, I.G. Darby, K. Andgren, B. Cederwall, S. Eeckhaudt, T. Grahn, C. Gray-Jones, P.T. Greenlees, B. Hadinia, P.M. Jones, R. Julin, S. Juutinen, M. Leino, A.-P. Leppänen, M. Nyman, D. O'Donnell, J. PakarinenP. Rahkila, M. Sandzelius, J. Sarén, C. Scholey, D. Seweryniak, J. Simpson

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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.

Original language	English
Pages (from-to)	695-698
Number of pages	4
Journal	Acta Physica Polonica B
Volume	46
Issue number	3
DOIs	https://doi.org/10.5506/APhysPolB.46.695
Publication status	Published - 2015
Externally published	Yes

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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., ... Simpson, J. (2015). Competing decay modes of a high-spin isomer in the proton-unbound nucleus 158Ta. Acta Physica Polonica B, 46(3), 695-698. https://doi.org/10.5506/APhysPolB.46.695

@article{22e94705e9bc44de95ca71d0a5d42fb4,

title = "Competing decay modes of a high-spin isomer in the proton-unbound nucleus 158Ta",

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.",

author = "R.J. Carroll and R.D. Page and D.T. Joss and J. Uusitalo and I.G. Darby and K. Andgren and B. Cederwall and S. Eeckhaudt and T. Grahn and C. Gray-Jones and P.T. Greenlees and B. Hadinia and P.M. Jones and R. Julin and S. Juutinen and M. Leino and A.-P. Lepp{\"a}nen and M. Nyman and D. O'Donnell and J. Pakarinen and P. Rahkila and M. Sandzelius and J. Sar{\'e}n and C. Scholey and D. Seweryniak and J. Simpson",

year = "2015",

doi = "10.5506/APhysPolB.46.695",

language = "English",

volume = "46",

pages = "695--698",

journal = "Acta Physica Polonica B",

issn = "0587-4254",

publisher = "Jagiellonian University",

number = "3",

}

Carroll, RJ, Page, RD, Joss, DT, Uusitalo, J, Darby, IG, Andgren, K, Cederwall, B, Eeckhaudt, S, Grahn, T, Gray-Jones, C, Greenlees, PT, Hadinia, B, Jones, PM, Julin, R, Juutinen, S, Leino, M, Leppänen, A-P, Nyman, M, O'Donnell, D, Pakarinen, J, Rahkila, P, Sandzelius, M, Sarén, J, Scholey, C, Seweryniak, D & Simpson, J 2015, 'Competing decay modes of a high-spin isomer in the proton-unbound nucleus 158Ta', Acta Physica Polonica B, vol. 46, no. 3, pp. 695-698. https://doi.org/10.5506/APhysPolB.46.695

TY - JOUR

T1 - Competing decay modes of a high-spin isomer in the proton-unbound nucleus 158Ta

AU - Carroll, R.J.

AU - Page, R.D.

AU - Joss, D.T.

AU - Uusitalo, J.

AU - Darby, I.G.

AU - Andgren, K.

AU - Cederwall, B.

AU - Eeckhaudt, S.

AU - Grahn, T.

AU - Gray-Jones, C.

AU - Greenlees, P.T.

AU - Hadinia, B.

AU - Jones, P.M.

AU - Julin, R.

AU - Juutinen, S.

AU - Leino, M.

AU - Leppänen, A.-P.

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.

PY - 2015

Y1 - 2015

N2 - 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.

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 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.

U2 - 10.5506/APhysPolB.46.695

DO - 10.5506/APhysPolB.46.695

M3 - Article

SN - 0587-4254

VL - 46

SP - 695

EP - 698

JO - Acta Physica Polonica B

JF - Acta Physica Polonica B

IS - 3

ER -

Competing decay modes of a high-spin isomer in the proton-unbound nucleus 158Ta

Abstract

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