THE YRAST SUPERDEFORMED BAND IN PB-194 - DIFFERENCES WITH HG-192

被引：27
|
作者：
GALL, BJP
DELONCLE, I
PORQUET, MG
HANNACHI, F
AICHE, M
AZAIEZ, F
BASTIN, G
BEAUSANG, CW
BERAUD, R
BOURGEOIS, C
CLARK, RM
DUFFAIT, R
DUPRAT, J
HAUSCHILD, K
HUBEL, H
JOYCE, MJ
KACI, M
KORICHI, A
LECOZ, Y
MEYER, M
PAUL, ES
PERRIN, N
POFFE, N
REDON, N
SCHUCK, C
SERGOLLE, H
SHARPEYSCHAFER, JF
SIMPSON, J
SMITH, AG
WADSWORTH, R
机构：
[1] INST PHYS NUCL LYON,F-91406 ORSAY,FRANCE
[2] INST PHYS NUCL LYON,IN2P3,CNRS,F-69622 VILLEURBANNE,FRANCE
[3] UNIV LYON 1,F-69622 VILLEURBANNE,FRANCE
[4] UNIV YORK,DEPT PHYS,YORK YO1 5DD,N YORKSHIRE,ENGLAND
[5] UNIV BONN,ISKP,D-53115 BONN,GERMANY
[6] UNIV LIVERPOOL,OLIVER LODGE LAB,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND
[7] UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND
[8] SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND
[9] UNIV MANCHESTER,SCHUSTER LAB,MANCHESTER M13 9PL,LANCS,ENGLAND
来源：
PHYSICS LETTERS B | 1995年 / 345卷 / 02期
关键词：
D O I：
10.1016/0370-2693(94)01514-D
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The yrast superdeformed (SD) structure of Pb-194 has been studied using the EUROGAM gamma-ray spectrometer. New results have been obtained at low as well as at high spin values. At low frequency, the SD band has been extended to the lowest-spin SD state ever observed in the A similar to 190 region. The energies of Pb-194 and Hg-192 SD bands are identical for ($) over bar h omega < 0.25 MeV. However, they diverge for higher frequency, which rules out the idea that these two SD bands are identical. Moreover, the SD band of Pb-194 is populated at lower spin values than that of Hg-192 and de-excites towards normally-deformed (ND) states at a spin value lower than that of Hg-192. This suggests that the barrier separating the SD and ND minima in the potential energy surface is higher in Pb-194 than in Hg-192.
引用
收藏
页码：124 / 130
页数：7
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