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; P. Rahkila; M. Sandzelius; J. Saren; C. Scholey; D. Seweryniak; J. Simpson

doi:10.1103/PhysRevLett.112.092501

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. PakarinenP. Rahkila, M. Sandzelius, J. Saren, C. Scholey, D. Seweryniak, J. Simpson

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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 language	English
Article number	092501
Journal	Physical Review Letters
Volume	112
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.112.092501
Publication status	Published - 7 Mar 2014

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David O'Donnell
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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., Leppanen, A.-P., Nyman, M., O'Donnell, D., ... Simpson, J. (2014). Blurring the boundaries: decays of multiparticle isomers at the proton drip line. Physical Review Letters, 112(9), Article 092501. https://doi.org/10.1103/PhysRevLett.112.092501

@article{058648c3bf024ec5bb151bc899cbea3a,

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",

year = "2014",

month = mar,

day = "7",

doi = "10.1103/PhysRevLett.112.092501",

language = "English",

volume = "112",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "9",

}

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

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

SN - 0031-9007

VL - 112

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

M1 - 092501

ER -

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

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