Fast decay of a three-particle isomer in 171Tm

P.M. Walker, R.J. Wood, G.D. Dracoulis, T. Kibédi, R.A. Bark, Alison Bruce, A.P. Byrne, P.M. Davidson, H.M. El-Masri, G.J. Lane, C. Moon, J.N. Orce, F.M. Prados Estevéz, C. Wheldon, A.N. Wilson

Research output: Contribution to journalArticle

Abstract

Incomplete-fusion reactions have been used to study high-spin states in 171Tm. Gamma rays and conversion electrons were measured using pulsed-beam conditions for enhanced isomer sensitivity. A Kπ=19/2+, three-quasiparticle isomer was identified, with a half-life of 1.7(2) µs. The faster than expected transition rates from the isomer can be understood as being due to a chance near-degeneracy, with mixing between the isomeric state and the Iπ=19/2+ member of the one-quasiparticle rotational bands to which it decays. The implied mixing matrix element is 12(2) eV.
Original languageEnglish
JournalPhysical Review C
Volume79
Issue number4
DOIs
Publication statusPublished - 24 Apr 2009

Fingerprint

isomers
decay
half life
fusion
gamma rays
sensitivity
matrices
electrons

Cite this

Walker, P. M., Wood, R. J., Dracoulis, G. D., Kibédi, T., Bark, R. A., Bruce, A., ... Wilson, A. N. (2009). Fast decay of a three-particle isomer in 171Tm. Physical Review C, 79(4). https://doi.org/10.1103/PhysReVc.79.044321
Walker, P.M. ; Wood, R.J. ; Dracoulis, G.D. ; Kibédi, T. ; Bark, R.A. ; Bruce, Alison ; Byrne, A.P. ; Davidson, P.M. ; El-Masri, H.M. ; Lane, G.J. ; Moon, C. ; Orce, J.N. ; Prados Estevéz, F.M. ; Wheldon, C. ; Wilson, A.N. / Fast decay of a three-particle isomer in 171Tm. In: Physical Review C. 2009 ; Vol. 79, No. 4.
@article{af5106c5e61e471f84ba4ac9babe5155,
title = "Fast decay of a three-particle isomer in 171Tm",
abstract = "Incomplete-fusion reactions have been used to study high-spin states in 171Tm. Gamma rays and conversion electrons were measured using pulsed-beam conditions for enhanced isomer sensitivity. A Kπ=19/2+, three-quasiparticle isomer was identified, with a half-life of 1.7(2) µs. The faster than expected transition rates from the isomer can be understood as being due to a chance near-degeneracy, with mixing between the isomeric state and the Iπ=19/2+ member of the one-quasiparticle rotational bands to which it decays. The implied mixing matrix element is 12(2) eV.",
author = "P.M. Walker and R.J. Wood and G.D. Dracoulis and T. Kib{\'e}di and R.A. Bark and Alison Bruce and A.P. Byrne and P.M. Davidson and H.M. El-Masri and G.J. Lane and C. Moon and J.N. Orce and {Prados Estev{\'e}z}, F.M. and C. Wheldon and A.N. Wilson",
year = "2009",
month = "4",
day = "24",
doi = "10.1103/PhysReVc.79.044321",
language = "English",
volume = "79",
journal = "Physical Review C",
issn = "0556-2813",
number = "4",

}

Walker, PM, Wood, RJ, Dracoulis, GD, Kibédi, T, Bark, RA, Bruce, A, Byrne, AP, Davidson, PM, El-Masri, HM, Lane, GJ, Moon, C, Orce, JN, Prados Estevéz, FM, Wheldon, C & Wilson, AN 2009, 'Fast decay of a three-particle isomer in 171Tm', Physical Review C, vol. 79, no. 4. https://doi.org/10.1103/PhysReVc.79.044321

Fast decay of a three-particle isomer in 171Tm. / Walker, P.M.; Wood, R.J.; Dracoulis, G.D.; Kibédi, T.; Bark, R.A.; Bruce, Alison; Byrne, A.P.; Davidson, P.M.; El-Masri, H.M.; Lane, G.J.; Moon, C.; Orce, J.N.; Prados Estevéz, F.M.; Wheldon, C.; Wilson, A.N.

In: Physical Review C, Vol. 79, No. 4, 24.04.2009.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Fast decay of a three-particle isomer in 171Tm

AU - Walker, P.M.

AU - Wood, R.J.

AU - Dracoulis, G.D.

AU - Kibédi, T.

AU - Bark, R.A.

AU - Bruce, Alison

AU - Byrne, A.P.

AU - Davidson, P.M.

AU - El-Masri, H.M.

AU - Lane, G.J.

AU - Moon, C.

AU - Orce, J.N.

AU - Prados Estevéz, F.M.

AU - Wheldon, C.

AU - Wilson, A.N.

PY - 2009/4/24

Y1 - 2009/4/24

N2 - Incomplete-fusion reactions have been used to study high-spin states in 171Tm. Gamma rays and conversion electrons were measured using pulsed-beam conditions for enhanced isomer sensitivity. A Kπ=19/2+, three-quasiparticle isomer was identified, with a half-life of 1.7(2) µs. The faster than expected transition rates from the isomer can be understood as being due to a chance near-degeneracy, with mixing between the isomeric state and the Iπ=19/2+ member of the one-quasiparticle rotational bands to which it decays. The implied mixing matrix element is 12(2) eV.

AB - Incomplete-fusion reactions have been used to study high-spin states in 171Tm. Gamma rays and conversion electrons were measured using pulsed-beam conditions for enhanced isomer sensitivity. A Kπ=19/2+, three-quasiparticle isomer was identified, with a half-life of 1.7(2) µs. The faster than expected transition rates from the isomer can be understood as being due to a chance near-degeneracy, with mixing between the isomeric state and the Iπ=19/2+ member of the one-quasiparticle rotational bands to which it decays. The implied mixing matrix element is 12(2) eV.

U2 - 10.1103/PhysReVc.79.044321

DO - 10.1103/PhysReVc.79.044321

M3 - Article

VL - 79

JO - Physical Review C

JF - Physical Review C

SN - 0556-2813

IS - 4

ER -

Walker PM, Wood RJ, Dracoulis GD, Kibédi T, Bark RA, Bruce A et al. Fast decay of a three-particle isomer in 171Tm. Physical Review C. 2009 Apr 24;79(4). https://doi.org/10.1103/PhysReVc.79.044321