Beyond band termination in 157Er and the search for wobbling excitations in strongly deformed 174Hf

M. A. Riley; M. K. Djongolov; A. O. Evans; D. J. Hartley; R. V.F. Janssens; E. S. Paul; J. Simpson; A. A. Aguilar; D. E. Appelbe; C. R. Bingham; D. B. Campbell; M. P. Carpenter; P. Chowdhury; P. T.W. Choy; R. M. Clark; M. Cromaz; D. M. Cullen; M. Danchev; G. D. Dracoulis; P. Fallon; A. Görgen; G. B. Hagemann; D. T. Joss; J. Goon; R. A. Kaye; T. L. Khoo; F. G. Kondev; R. W. Laird; K. Lagergren; T. Lauritsen; A. O. MacChiavelli; B. McClain; E. F. Moore; G. Mukherjee; E. Ngijoi-Yogo; P. J. Nolan; H. I. Park; A. Pipidis; L. L. Riedinger; G. Sletten; S. K. Tandel; P. M. Walker; D. Ward; I. Ragnarsson; F. Sarić; Jing Ye Zhang

doi:10.1088/0954-3899/31/10/064

Beyond band termination in ¹⁵⁷Er and the search for wobbling excitations in strongly deformed ¹⁷⁴Hf

M. A. Riley^*, M. K. Djongolov, A. O. Evans, D. J. Hartley, R. V.F. Janssens, E. S. Paul, J. Simpson, A. A. Aguilar, D. E. Appelbe, C. R. Bingham, D. B. Campbell, M. P. Carpenter, P. Chowdhury, P. T.W. Choy, R. M. Clark, M. Cromaz, D. M. Cullen, M. Danchev, G. D. Dracoulis, P. FallonA. Görgen, G. B. Hagemann, D. T. Joss, J. Goon, R. A. Kaye, T. L. Khoo, F. G. Kondev, R. W. Laird, K. Lagergren, T. Lauritsen, A. O. MacChiavelli, B. McClain, E. F. Moore, G. Mukherjee, E. Ngijoi-Yogo, P. J. Nolan, H. I. Park, A. Pipidis, L. L. Riedinger, G. Sletten, S. K. Tandel, P. M. Walker, D. Ward, I. Ragnarsson, F. Sarić, Jing Ye Zhang

^*Corresponding author for this work

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

Abstract

High-spin terminating bands in heavy nuclei were first identified in nuclei around ¹⁵⁸Er₉₀. While examples of special 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 ¹⁵⁷Er 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 ¹⁷⁴Hf and ultimate cranker calculations predict 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 was run to search for linking transitions between the SD bands and possible wobbling modes.

Original language	English
Pages (from-to)	S1735-S1740
Journal	Journal of Physics G: Nuclear and Particle Physics
Volume	31
Issue number	10
DOIs	https://doi.org/10.1088/0954-3899/31/10/064
Publication status	Published - 1 Oct 2005

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Riley, M. A., Djongolov, M. K., Evans, A. O., Hartley, D. J., Janssens, R. V. F., Paul, E. S., Simpson, J., Aguilar, A. A., Appelbe, D. E., Bingham, C. R., Campbell, D. B., Carpenter, M. P., Chowdhury, P., Choy, P. T. W., Clark, R. M., Cromaz, M., Cullen, D. M., Danchev, M., Dracoulis, G. D., ... Zhang, J. Y. (2005). Beyond band termination in ¹⁵⁷Er and the search for wobbling excitations in strongly deformed ¹⁷⁴Hf. Journal of Physics G: Nuclear and Particle Physics, 31(10), S1735-S1740. https://doi.org/10.1088/0954-3899/31/10/064

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title = "Beyond band termination in 157Er and the search for wobbling excitations in strongly deformed 174Hf",

abstract = "High-spin terminating bands in heavy nuclei were first identified in nuclei around 158Er90. While examples of special 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 157Er 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 174Hf and ultimate cranker calculations predict 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 was run to search for linking transitions between the SD bands and possible wobbling modes.",

author = "Riley, {M. A.} and Djongolov, {M. K.} and Evans, {A. O.} and Hartley, {D. J.} and Janssens, {R. V.F.} and Paul, {E. S.} and J. Simpson and Aguilar, {A. A.} and Appelbe, {D. E.} and Bingham, {C. R.} and Campbell, {D. B.} and Carpenter, {M. P.} and P. Chowdhury and Choy, {P. T.W.} and Clark, {R. M.} and M. Cromaz and Cullen, {D. M.} and M. Danchev and Dracoulis, {G. D.} and P. Fallon and A. G{\"o}rgen and Hagemann, {G. B.} and Joss, {D. T.} and J. Goon and Kaye, {R. A.} and Khoo, {T. L.} and Kondev, {F. G.} and Laird, {R. W.} and K. Lagergren and T. Lauritsen and MacChiavelli, {A. O.} and B. McClain and Moore, {E. F.} and G. Mukherjee and E. Ngijoi-Yogo and Nolan, {P. J.} and Park, {H. I.} and A. Pipidis and Riedinger, {L. L.} and G. Sletten and Tandel, {S. K.} and Walker, {P. M.} and D. Ward and I. Ragnarsson and F. Sari{\'c} and Zhang, {Jing Ye}",

year = "2005",

month = oct,

day = "1",

doi = "10.1088/0954-3899/31/10/064",

language = "English",

volume = "31",

pages = "S1735--S1740",

journal = "Journal of Physics G: Nuclear and Particle Physics",

issn = "0954-3899",

publisher = "IOP Publishing Ltd.",

number = "10",

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Riley, MA, Djongolov, MK, Evans, AO, Hartley, DJ, Janssens, RVF, Paul, ES, 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, Görgen, 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, Pipidis, A, Riedinger, LL, Sletten, G, Tandel, SK, Walker, PM, Ward, D, Ragnarsson, I, Sarić, F & Zhang, JY 2005, 'Beyond band termination in ¹⁵⁷Er and the search for wobbling excitations in strongly deformed ¹⁷⁴Hf', Journal of Physics G: Nuclear and Particle Physics, vol. 31, no. 10, pp. S1735-S1740. https://doi.org/10.1088/0954-3899/31/10/064

TY - JOUR

T1 - Beyond band termination in 157Er and the search for wobbling excitations in strongly deformed 174Hf

AU - Riley, M. A.

AU - Djongolov, M. K.

AU - Evans, A. O.

AU - Hartley, D. J.

AU - Janssens, R. V.F.

AU - Paul, E. S.

AU - Simpson, J.

AU - Aguilar, A. A.

AU - Appelbe, D. E.

AU - Bingham, C. R.

AU - Campbell, D. B.

AU - Carpenter, M. P.

AU - Chowdhury, P.

AU - Choy, P. T.W.

AU - Clark, R. M.

AU - Cromaz, M.

AU - Cullen, D. M.

AU - Danchev, M.

AU - Dracoulis, G. D.

AU - Fallon, P.

AU - Görgen, A.

AU - Hagemann, G. B.

AU - Joss, D. T.

AU - Goon, J.

AU - Kaye, R. A.

AU - Khoo, T. L.

AU - Kondev, F. G.

AU - Laird, R. W.

AU - Lagergren, K.

AU - Lauritsen, T.

AU - MacChiavelli, A. O.

AU - McClain, B.

AU - Moore, E. F.

AU - Mukherjee, G.

AU - Ngijoi-Yogo, E.

AU - Nolan, P. J.

AU - Park, H. I.

AU - Pipidis, A.

AU - Riedinger, L. L.

AU - Sletten, G.

AU - Tandel, S. K.

AU - Walker, P. M.

AU - Ward, D.

AU - Ragnarsson, I.

AU - Sarić, F.

AU - Zhang, Jing Ye

PY - 2005/10/1

Y1 - 2005/10/1

N2 - High-spin terminating bands in heavy nuclei were first identified in nuclei around 158Er90. While examples of special 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 157Er 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 174Hf and ultimate cranker calculations predict 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 was run to search for linking transitions between the SD bands and possible wobbling modes.

AB - High-spin terminating bands in heavy nuclei were first identified in nuclei around 158Er90. While examples of special 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 157Er 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 174Hf and ultimate cranker calculations predict 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 was run to search for linking transitions between the SD bands and possible wobbling modes.

UR - http://www.scopus.com/inward/record.url?scp=25444447399&partnerID=8YFLogxK

U2 - 10.1088/0954-3899/31/10/064

DO - 10.1088/0954-3899/31/10/064

M3 - Article

SN - 0954-3899

VL - 31

SP - S1735-S1740

JO - Journal of Physics G: Nuclear and Particle Physics

JF - Journal of Physics G: Nuclear and Particle Physics

IS - 10

ER -

Beyond band termination in ¹⁵⁷Er and the search for wobbling excitations in strongly deformed ¹⁷⁴Hf

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