High-K four-quasiparticle states in Gd138

M. G. Procter; D. M. Cullen; C. Scholey; P. T. Greenlees; J. Hirvonen; U. Jakobsson; P. Jones; R. Julin; S. Juutinen; S. Ketelhut; M. Leino; N. M. Lumley; P. J.R. Mason; P. Nieminen; M. Nyman; P. Peura; P. Rahkila; J. M. Regis; P. Ruotsalainen; J. Sarén; Y. Shi; J. Sorri; S. Stolze; J. Uusitalo; F. R. Xu

doi:10.1103/PhysRevC.83.034311

High-K four-quasiparticle states in Gd138

M. G. Procter^*
, D. M. Cullen
, C. Scholey
, P. T. Greenlees
, J. Hirvonen
, U. Jakobsson
, P. Jones
, R. Julin
, S. Juutinen
, S. Ketelhut
, M. Leino
, N. M. Lumley
, P. J.R. Mason
, P. Nieminen
, M. Nyman
, P. Peura
, P. Rahkila
, J. M. Regis
, P. Ruotsalainen
, J. Sarén

Y. Shi, J. Sorri, S. Stolze, J. Uusitalo, F. R. Xu

^*Corresponding author for this work

University of Manchester
University of Jyväskylä
University of Surrey
University of Helsinki
University of Cologne
Peking University

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

5 Scopus citations

Abstract

States above the known Kπ=8^- 6 μs isomer in Gd138 have been populated with the Cd106(Ar36,2p2n) reaction at a beam energy of 180 MeV at the University of Jyväskylä, Finland. The recoil-isomer tagging technique was utilized to correlate delayed γ-ray decays, detected in the GREAT focal plane spectrometer, with prompt decays measured in the JUROGAM II spectrometer at the target position. The lifetime of the Kπ=8^- isomeric state has been remeasured as 6.2(2) μs. Two high-lying strongly coupled bands have been established with Kπ≥12^-. Potential-energy surface calculations, in conjunction with g factor measurements, reveal that they are built upon four-quasiparticle structures comprising two-quasineutron plus two-quasiproton configurations. The short half-life or lack of hindrance for the decays from these four-quasiparticle band-head states is reasoned to be a consequence of increased triaxial deformation and mixing due to the high density of states relative to the lower two-quasiparticle 6-μs isomeric state.

Original language	English
Article number	034311
Journal	Physical Review C - Nuclear Physics
Volume	83
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.83.034311
State	Published - 10 Mar 2011
Externally published	Yes

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Procter, M. G., Cullen, D. M., Scholey, C., Greenlees, P. T., Hirvonen, J., Jakobsson, U., Jones, P., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Lumley, N. M., Mason, P. J. R., Nieminen, P., Nyman, M., Peura, P., Rahkila, P., Regis, J. M., Ruotsalainen, P., ... Xu, F. R. (2011). High-K four-quasiparticle states in Gd138. Physical Review C - Nuclear Physics, 83(3), Article 034311. https://doi.org/10.1103/PhysRevC.83.034311

@article{ed74b5bcd3934994aa54ebbbfff04629,

title = "High-K four-quasiparticle states in Gd138",

abstract = "States above the known Kπ=8- 6 μs isomer in Gd138 have been populated with the Cd106(Ar36,2p2n) reaction at a beam energy of 180 MeV at the University of Jyv{\"a}skyl{\"a}, Finland. The recoil-isomer tagging technique was utilized to correlate delayed γ-ray decays, detected in the GREAT focal plane spectrometer, with prompt decays measured in the JUROGAM II spectrometer at the target position. The lifetime of the Kπ=8- isomeric state has been remeasured as 6.2(2) μs. Two high-lying strongly coupled bands have been established with Kπ≥12-. Potential-energy surface calculations, in conjunction with g factor measurements, reveal that they are built upon four-quasiparticle structures comprising two-quasineutron plus two-quasiproton configurations. The short half-life or lack of hindrance for the decays from these four-quasiparticle band-head states is reasoned to be a consequence of increased triaxial deformation and mixing due to the high density of states relative to the lower two-quasiparticle 6-μs isomeric state.",

author = "Procter, \{M. G.\} and Cullen, \{D. M.\} and C. Scholey and Greenlees, \{P. T.\} and J. Hirvonen and U. Jakobsson and P. Jones and R. Julin and S. Juutinen and S. Ketelhut and M. Leino and Lumley, \{N. M.\} and Mason, \{P. J.R.\} and P. Nieminen and M. Nyman and P. Peura and P. Rahkila and Regis, \{J. M.\} and P. Ruotsalainen and J. Sar{\'e}n and Y. Shi and J. Sorri and S. Stolze and J. Uusitalo and Xu, \{F. R.\}",

year = "2011",

month = mar,

day = "10",

doi = "10.1103/PhysRevC.83.034311",

language = "英语",

volume = "83",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

}

Procter, MG, Cullen, DM, Scholey, C, Greenlees, PT, Hirvonen, J, Jakobsson, U, Jones, P, Julin, R, Juutinen, S, Ketelhut, S, Leino, M, Lumley, NM, Mason, PJR, Nieminen, P, Nyman, M, Peura, P, Rahkila, P, Regis, JM, Ruotsalainen, P, Sarén, J, Shi, Y, Sorri, J, Stolze, S, Uusitalo, J & Xu, FR 2011, 'High-K four-quasiparticle states in Gd138', Physical Review C - Nuclear Physics, vol. 83, no. 3, 034311. https://doi.org/10.1103/PhysRevC.83.034311

TY - JOUR

T1 - High-K four-quasiparticle states in Gd138

AU - Procter, M. G.

AU - Cullen, D. M.

AU - Scholey, C.

AU - Greenlees, P. T.

AU - Hirvonen, J.

AU - Jakobsson, U.

AU - Jones, P.

AU - Julin, R.

AU - Juutinen, S.

AU - Ketelhut, S.

AU - Leino, M.

AU - Lumley, N. M.

AU - Mason, P. J.R.

AU - Nieminen, P.

AU - Nyman, M.

AU - Peura, P.

AU - Rahkila, P.

AU - Regis, J. M.

AU - Ruotsalainen, P.

AU - Sarén, J.

AU - Shi, Y.

AU - Sorri, J.

AU - Stolze, S.

AU - Uusitalo, J.

AU - Xu, F. R.

PY - 2011/3/10

Y1 - 2011/3/10

N2 - States above the known Kπ=8- 6 μs isomer in Gd138 have been populated with the Cd106(Ar36,2p2n) reaction at a beam energy of 180 MeV at the University of Jyväskylä, Finland. The recoil-isomer tagging technique was utilized to correlate delayed γ-ray decays, detected in the GREAT focal plane spectrometer, with prompt decays measured in the JUROGAM II spectrometer at the target position. The lifetime of the Kπ=8- isomeric state has been remeasured as 6.2(2) μs. Two high-lying strongly coupled bands have been established with Kπ≥12-. Potential-energy surface calculations, in conjunction with g factor measurements, reveal that they are built upon four-quasiparticle structures comprising two-quasineutron plus two-quasiproton configurations. The short half-life or lack of hindrance for the decays from these four-quasiparticle band-head states is reasoned to be a consequence of increased triaxial deformation and mixing due to the high density of states relative to the lower two-quasiparticle 6-μs isomeric state.

AB - States above the known Kπ=8- 6 μs isomer in Gd138 have been populated with the Cd106(Ar36,2p2n) reaction at a beam energy of 180 MeV at the University of Jyväskylä, Finland. The recoil-isomer tagging technique was utilized to correlate delayed γ-ray decays, detected in the GREAT focal plane spectrometer, with prompt decays measured in the JUROGAM II spectrometer at the target position. The lifetime of the Kπ=8- isomeric state has been remeasured as 6.2(2) μs. Two high-lying strongly coupled bands have been established with Kπ≥12-. Potential-energy surface calculations, in conjunction with g factor measurements, reveal that they are built upon four-quasiparticle structures comprising two-quasineutron plus two-quasiproton configurations. The short half-life or lack of hindrance for the decays from these four-quasiparticle band-head states is reasoned to be a consequence of increased triaxial deformation and mixing due to the high density of states relative to the lower two-quasiparticle 6-μs isomeric state.

UR - https://www.scopus.com/pages/publications/79960582106

U2 - 10.1103/PhysRevC.83.034311

DO - 10.1103/PhysRevC.83.034311

M3 - 文章

AN - SCOPUS:79960582106

SN - 0556-2813

VL - 83

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 3

M1 - 034311

ER -

High-K four-quasiparticle states in Gd138

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