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

doi:10.1103/PhysReVc.79.044321

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

University of Brighton

Research output: Contribution to journal › Article › peer-review

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 K^π=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 I^π=19/2⁺ member of the one-quasiparticle rotational bands to which it decays. The implied mixing matrix element is 12(2) eV.

Original language	English
Journal	Physical Review C
Volume	79
Issue number	4
DOIs	https://doi.org/10.1103/PhysReVc.79.044321
Publication status	Published - 24 Apr 2009

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Cite this

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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 = apr,

day = "24",

doi = "10.1103/PhysReVc.79.044321",

language = "English",

volume = "79",

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issn = "1089-490X",

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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

SN - 1089-490X

VL - 79

JO - Physical Review C

JF - Physical Review C

IS - 4

ER -

Fast decay of a three-particle isomer in 171Tm

Abstract

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Fast decay of a three-particle isomer in ¹⁷¹Tm