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

页码：124 / 130

页数：7

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