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Observation of states beyond band termination in Er-156,Er-157,Er-158 and strongly deformed structures in Hf-173,Hf-174,Hf-175

Riley, MA, Djongolov, MK, Evans, AO, Hartley, DJ, Janssens, RVF, Paul, ES, Pipidis, A, Simpson, J, Aguilar, AA, Appelbe, DE, Bingham, CR, Campbell, DB, Carpenter, MP, Chowdhury, P, Choy, PTW, Clark, RM, Cromaz, M, Cullen, DM, Danchev, M, Dracoulis, GD, Fallon, P, Gorgen, A, Hagemann, GB, Joss, DT, Goon, J, Kaye, RA, Khoo, TL, Kondev, FG, Laird, RW, Lagergren, K, Lauritsen, T, Macchiavelli, AO, McClain, B, Moore, EF, Mukherjee, G, Ngijoi-Yogo, E, Nolan, PJ, Park, HI, Riedinger, LL, Sletten, G, Tandel, SK, Walker, PM, Ward, D, Ragnarsson, I, Saric, F and Zhang, JY (2006) Observation of states beyond band termination in Er-156,Er-157,Er-158 and strongly deformed structures in Hf-173,Hf-174,Hf-175 PHYSICA SCRIPTA, T125. pp. 123-126.

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Abstract

High-spin terminating bands in heavy nuclei were first identified in nuclei around Er-158(90). While examples of terminating states have been identified in a number of erbium isotopes, almost nothing is known about the states lying beyond band termination. In the present work, the high-spin structure of Er-156,Er-157,Er-158 has been studied using the Gammasphere spectrometer. The subject of triaxial superdeformation and 'wobbling' modes in Lu nuclei has rightly attracted a great deal of attention. Very recently four strongly or superdeformed (SD) sequences have been observed in Hf-174, and cranking calculations using the Ultimate Cranker code predict that such structures may have significant triaxial deformation. We have performed two experiments in an attempt to verify the possible triaxial nature of these bands. A lifetime measurement was performed to confirm the large (and similar) deformation of the bands. In addition, a high-statistics, thin-target experiment took place to search for linking transitions between the SD bands, possible wobbling modes, and new SD band structures.

Item Type: Article
Authors :
NameEmailORCID
Riley, MAUNSPECIFIEDUNSPECIFIED
Djongolov, MKUNSPECIFIEDUNSPECIFIED
Evans, AOUNSPECIFIEDUNSPECIFIED
Hartley, DJUNSPECIFIEDUNSPECIFIED
Janssens, RVFUNSPECIFIEDUNSPECIFIED
Paul, ESUNSPECIFIEDUNSPECIFIED
Pipidis, AUNSPECIFIEDUNSPECIFIED
Simpson, JUNSPECIFIEDUNSPECIFIED
Aguilar, AAUNSPECIFIEDUNSPECIFIED
Appelbe, DEUNSPECIFIEDUNSPECIFIED
Bingham, CRUNSPECIFIEDUNSPECIFIED
Campbell, DBUNSPECIFIEDUNSPECIFIED
Carpenter, MPUNSPECIFIEDUNSPECIFIED
Chowdhury, PUNSPECIFIEDUNSPECIFIED
Choy, PTWUNSPECIFIEDUNSPECIFIED
Clark, RMUNSPECIFIEDUNSPECIFIED
Cromaz, MUNSPECIFIEDUNSPECIFIED
Cullen, DMUNSPECIFIEDUNSPECIFIED
Danchev, MUNSPECIFIEDUNSPECIFIED
Dracoulis, GDUNSPECIFIEDUNSPECIFIED
Fallon, PUNSPECIFIEDUNSPECIFIED
Gorgen, AUNSPECIFIEDUNSPECIFIED
Hagemann, GBUNSPECIFIEDUNSPECIFIED
Joss, DTUNSPECIFIEDUNSPECIFIED
Goon, JUNSPECIFIEDUNSPECIFIED
Kaye, RAUNSPECIFIEDUNSPECIFIED
Khoo, TLUNSPECIFIEDUNSPECIFIED
Kondev, FGUNSPECIFIEDUNSPECIFIED
Laird, RWUNSPECIFIEDUNSPECIFIED
Lagergren, KUNSPECIFIEDUNSPECIFIED
Lauritsen, TUNSPECIFIEDUNSPECIFIED
Macchiavelli, AOUNSPECIFIEDUNSPECIFIED
McClain, BUNSPECIFIEDUNSPECIFIED
Moore, EFUNSPECIFIEDUNSPECIFIED
Mukherjee, GUNSPECIFIEDUNSPECIFIED
Ngijoi-Yogo, EUNSPECIFIEDUNSPECIFIED
Nolan, PJUNSPECIFIEDUNSPECIFIED
Park, HIUNSPECIFIEDUNSPECIFIED
Riedinger, LLUNSPECIFIEDUNSPECIFIED
Sletten, GUNSPECIFIEDUNSPECIFIED
Tandel, SKUNSPECIFIEDUNSPECIFIED
Walker, PMp.walker@surrey.ac.ukUNSPECIFIED
Ward, DUNSPECIFIEDUNSPECIFIED
Ragnarsson, IUNSPECIFIEDUNSPECIFIED
Saric, FUNSPECIFIEDUNSPECIFIED
Zhang, JYUNSPECIFIEDUNSPECIFIED
Date : July 2006
Identification Number : https://doi.org/10.1088/0031-8949/2006/T125/028
Uncontrolled Keywords : NUCLEI, EXCITATIONS
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 11:20
Last Modified : 17 May 2017 14:55
URI: http://epubs.surrey.ac.uk/id/eprint/830967

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