Blurring the boundaries: decays of multiparticle isomers at the proton drip line

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. Leppanen, M. Nyman, D. O'Donnell, J. Pakarinen & 6 others P. Rahkila, M. Sandzelius, J. Saren, C. Scholey, D. Seweryniak, J. Simpson

Research output: Contribution to journalArticle

Abstract

A multiparticle spin-trap isomer has been discovered in the proton-unbound nucleus Ta85      73158. The isomer mainly decays by γ-ray emission with a half-life of 6.1(1)  μs. Analysis of the γ-ray data shows that the isomer lies 2668 keV above the known 9+ state and has a spin 10ℏ higher and negative parity. This 19− isomer also has an 8644(11) keV, 1.4(2)% α-decay branch that populates the 9+ state in Lu154. No proton-decay branch from the isomer was identified, despite the isomer being unbound to proton emission by 3261(14) keV. This remarkable stability against proton emission is compared with theoretical predictions, and the implications for the extent of observable nuclides are considered.
Original languageEnglish
Article number092501
JournalPhysical Review Letters
Volume112
Issue number9
DOIs
Publication statusPublished - 7 Mar 2014

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blurring
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half life
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Carroll, R. J., Page, R. D., Joss, D. T., Uusitalo, J., Darby, I. G., Andgren, K., ... Simpson, J. (2014). Blurring the boundaries: decays of multiparticle isomers at the proton drip line. Physical Review Letters, 112(9), [092501]. https://doi.org/10.1103/PhysRevLett.112.092501
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. ; Leppanen, A.-P. ; Nyman, M. ; O'Donnell, D. ; Pakarinen, J. ; Rahkila, P. ; Sandzelius, M. ; Saren, J. ; Scholey, C. ; Seweryniak, D. ; Simpson, J. / Blurring the boundaries : decays of multiparticle isomers at the proton drip line. In: Physical Review Letters. 2014 ; Vol. 112, No. 9.
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title = "Blurring the boundaries: decays of multiparticle isomers at the proton drip line",
abstract = "A multiparticle spin-trap isomer has been discovered in the proton-unbound nucleus Ta85      73158. The isomer mainly decays by γ-ray emission with a half-life of 6.1(1)  μs. Analysis of the γ-ray data shows that the isomer lies 2668 keV above the known 9+ state and has a spin 10ℏ higher and negative parity. This 19− isomer also has an 8644(11) keV, 1.4(2){\%} α-decay branch that populates the 9+ state in Lu154. No proton-decay branch from the isomer was identified, despite the isomer being unbound to proton emission by 3261(14) keV. This remarkable stability against proton emission is compared with theoretical predictions, and the implications for the extent of observable nuclides are considered.",
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. Leppanen and M. Nyman and D. O'Donnell and J. Pakarinen and P. Rahkila and M. Sandzelius and J. Saren and C. Scholey and D. Seweryniak and J. Simpson",
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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, Leppanen, A-P, Nyman, M, O'Donnell, D, Pakarinen, J, Rahkila, P, Sandzelius, M, Saren, J, Scholey, C, Seweryniak, D & Simpson, J 2014, 'Blurring the boundaries: decays of multiparticle isomers at the proton drip line' Physical Review Letters, vol. 112, no. 9, 092501. https://doi.org/10.1103/PhysRevLett.112.092501

Blurring the boundaries : decays of multiparticle isomers at the proton drip line. / 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.; Leppanen, A.-P.; Nyman, M.; O'Donnell, D.; Pakarinen, J.; Rahkila, P.; Sandzelius, M.; Saren, J.; Scholey, C.; Seweryniak, D.; Simpson, J.

In: Physical Review Letters, Vol. 112, No. 9, 092501, 07.03.2014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Blurring the boundaries

T2 - decays of multiparticle isomers at the proton drip line

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 - Leppanen, A.-P.

AU - Nyman, M.

AU - O'Donnell, D.

AU - Pakarinen, J.

AU - Rahkila, P.

AU - Sandzelius, M.

AU - Saren, J.

AU - Scholey, C.

AU - Seweryniak, D.

AU - Simpson, J.

PY - 2014/3/7

Y1 - 2014/3/7

N2 - A multiparticle spin-trap isomer has been discovered in the proton-unbound nucleus Ta85      73158. The isomer mainly decays by γ-ray emission with a half-life of 6.1(1)  μs. Analysis of the γ-ray data shows that the isomer lies 2668 keV above the known 9+ state and has a spin 10ℏ higher and negative parity. This 19− isomer also has an 8644(11) keV, 1.4(2)% α-decay branch that populates the 9+ state in Lu154. No proton-decay branch from the isomer was identified, despite the isomer being unbound to proton emission by 3261(14) keV. This remarkable stability against proton emission is compared with theoretical predictions, and the implications for the extent of observable nuclides are considered.

AB - A multiparticle spin-trap isomer has been discovered in the proton-unbound nucleus Ta85      73158. The isomer mainly decays by γ-ray emission with a half-life of 6.1(1)  μs. Analysis of the γ-ray data shows that the isomer lies 2668 keV above the known 9+ state and has a spin 10ℏ higher and negative parity. This 19− isomer also has an 8644(11) keV, 1.4(2)% α-decay branch that populates the 9+ state in Lu154. No proton-decay branch from the isomer was identified, despite the isomer being unbound to proton emission by 3261(14) keV. This remarkable stability against proton emission is compared with theoretical predictions, and the implications for the extent of observable nuclides are considered.

U2 - 10.1103/PhysRevLett.112.092501

DO - 10.1103/PhysRevLett.112.092501

M3 - Article

VL - 112

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 9

M1 - 092501

ER -

Carroll RJ, Page RD, Joss DT, Uusitalo J, Darby IG, Andgren K et al. Blurring the boundaries: decays of multiparticle isomers at the proton drip line. Physical Review Letters. 2014 Mar 7;112(9). 092501. https://doi.org/10.1103/PhysRevLett.112.092501