Quadrupole moment of the yrast superdeformed band in 192Pb

Anna N. Wilson; G. D. Dracoulis; P. M. Davidson; A. P. Byrne; R. M. Clark; P. Fallon; A. Görgen; G. J. Lane; A. O. Macchiavelli; D. Ward

doi:10.1016/j.nuclphysa.2004.10.017

Quadrupole moment of the yrast superdeformed band in ¹⁹²Pb

Anna N. Wilson^*, G. D. Dracoulis, P. M. Davidson, A. P. Byrne, R. M. Clark, P. Fallon, A. Görgen, G. J. Lane, A. O. Macchiavelli, D. Ward

^*Corresponding author for this work

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

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Abstract

The lifetimes of states with spins 26ℏ ≥ I ≥ 18ℏ in the yrast superdeformed band of ¹⁹²Pb have been measured using the Doppler shift attenuation method. The results are consistent with a constant quadrupole moment (Q₀) = 19.6_-0.4 ^+0.5 (stat) ± 2.0 (sys) eb. This result is comparable with the values obtained for SD bands in Pb isotopes with N ≥ 112, but could also be consistent with the smaller quadrupole moment measured in ¹⁹³Pb. Reasons for the apparently lower deformation of SD ¹⁹³Pb (compared to its heavier neighbours) are considered in the light of total Routhian surface calculations, and the question of whether a similarly reduced deformation should be expected in ¹⁹²Pb is addressed.

Original language	English
Pages (from-to)	12-26
Number of pages	15
Journal	Nuclear Physics A
Volume	748
Issue number	1-2
DOIs	https://doi.org/10.1016/j.nuclphysa.2004.10.017
Publication status	Published - 7 Feb 2005

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10.1016/j.nuclphysa.2004.10.017

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title = "Quadrupole moment of the yrast superdeformed band in 192Pb",

abstract = "The lifetimes of states with spins 26ℏ ≥ I ≥ 18ℏ in the yrast superdeformed band of 192Pb have been measured using the Doppler shift attenuation method. The results are consistent with a constant quadrupole moment (Q0) = 19.6-0.4 +0.5 (stat) ± 2.0 (sys) eb. This result is comparable with the values obtained for SD bands in Pb isotopes with N ≥ 112, but could also be consistent with the smaller quadrupole moment measured in 193Pb. Reasons for the apparently lower deformation of SD 193Pb (compared to its heavier neighbours) are considered in the light of total Routhian surface calculations, and the question of whether a similarly reduced deformation should be expected in 192Pb is addressed.",

keywords = "Gammasphere array, total Routhian surface calculation, Nuclear reactions Si(Er,5n), E=154 MeV; measured, Eγ, Iγ,gamma;γ-coin,DSA, Pb deduced superdeformed band levels T,quadrupole moment",

author = "Wilson, {Anna N.} and Dracoulis, {G. D.} and Davidson, {P. M.} and Byrne, {A. P.} and Clark, {R. M.} and P. Fallon and A. G{\"o}rgen and Lane, {G. J.} and Macchiavelli, {A. O.} and D. Ward",

year = "2005",

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doi = "10.1016/j.nuclphysa.2004.10.017",

language = "English",

volume = "748",

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T1 - Quadrupole moment of the yrast superdeformed band in 192Pb

AU - Wilson, Anna N.

AU - Dracoulis, G. D.

AU - Davidson, P. M.

AU - Byrne, A. P.

AU - Clark, R. M.

AU - Fallon, P.

AU - Görgen, A.

AU - Lane, G. J.

AU - Macchiavelli, A. O.

AU - Ward, D.

PY - 2005/2/7

Y1 - 2005/2/7

N2 - The lifetimes of states with spins 26ℏ ≥ I ≥ 18ℏ in the yrast superdeformed band of 192Pb have been measured using the Doppler shift attenuation method. The results are consistent with a constant quadrupole moment (Q0) = 19.6-0.4 +0.5 (stat) ± 2.0 (sys) eb. This result is comparable with the values obtained for SD bands in Pb isotopes with N ≥ 112, but could also be consistent with the smaller quadrupole moment measured in 193Pb. Reasons for the apparently lower deformation of SD 193Pb (compared to its heavier neighbours) are considered in the light of total Routhian surface calculations, and the question of whether a similarly reduced deformation should be expected in 192Pb is addressed.

AB - The lifetimes of states with spins 26ℏ ≥ I ≥ 18ℏ in the yrast superdeformed band of 192Pb have been measured using the Doppler shift attenuation method. The results are consistent with a constant quadrupole moment (Q0) = 19.6-0.4 +0.5 (stat) ± 2.0 (sys) eb. This result is comparable with the values obtained for SD bands in Pb isotopes with N ≥ 112, but could also be consistent with the smaller quadrupole moment measured in 193Pb. Reasons for the apparently lower deformation of SD 193Pb (compared to its heavier neighbours) are considered in the light of total Routhian surface calculations, and the question of whether a similarly reduced deformation should be expected in 192Pb is addressed.

KW - Gammasphere array, total Routhian surface calculation

KW - Nuclear reactions Si(Er,5n), E=154 MeV; measured, Eγ, Iγ,gamma;γ-coin,DSA

KW - Pb deduced superdeformed band levels T,quadrupole moment

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U2 - 10.1016/j.nuclphysa.2004.10.017

DO - 10.1016/j.nuclphysa.2004.10.017

M3 - Article

SN - 0375-9474

VL - 748

SP - 12

EP - 26

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1-2

ER -

Quadrupole moment of the yrast superdeformed band in ¹⁹²Pb

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