Diverse collective excitations in Er-159 up to high spin

Mustafa, M.; Ollier, J.; Simpson, J.; Riley, M. A.; Paul, E. S.; Wang, X.; Aguilar, A.; Carpenter, M. P.; Darby, I. G.; Hartley, D. J.; Janssens, R. V. F.; Kondev, F. G.; Lauritsen, T.; Nolan, P. J.; Petri, M.; Rees, J. M.; Revill, J. P.; Rigby, S. V.; Teal, C.; Thomson, J.; Unsworth, C.; Zhu, S.; Carlsson, Gillis; Ma, Hailiang; Mufti, Tajdar; Ragnarsson, Ingemar

Diverse collective excitations in Er-159 up to high spin

Mark

Mustafa, M. ; Ollier, J. ; Simpson, J. ; Riley, M. A. ; Paul, E. S. ; Wang, X. ; Aguilar, A. ; Carpenter, M. P. ; Darby, I. G. and Hartley, D. J. , et al. (2011) In Physical Review C (Nuclear Physics) 84(5).

Abstract: A spectroscopic investigation of the gamma decays from excited states in Er-159 has been performed to study the changing structural properties exhibited as ultrahigh spins (I > 60 (h) over bar) are approached. The nucleus of Er-159 was populated by the reaction Cd-116(Ca-48, 5n gamma) at a beam energy of 215 MeV, and the resulting gamma decays were studied using the Gammasphere spectrometer. New rotational bands and extensions to existing sequences were observed, which are discussed in terms of the cranked shell model, revealing a diverse range of quasiparticle configurations. At spins around 50 (h) over bar, there is evidence for a change from dominant prolate collective motion at the yrast line to oblate non-collective structures via... (More); A spectroscopic investigation of the gamma decays from excited states in Er-159 has been performed to study the changing structural properties exhibited as ultrahigh spins (I > 60 (h) over bar) are approached. The nucleus of Er-159 was populated by the reaction Cd-116(Ca-48, 5n gamma) at a beam energy of 215 MeV, and the resulting gamma decays were studied using the Gammasphere spectrometer. New rotational bands and extensions to existing sequences were observed, which are discussed in terms of the cranked shell model, revealing a diverse range of quasiparticle configurations. At spins around 50 (h) over bar, there is evidence for a change from dominant prolate collective motion at the yrast line to oblate non-collective structures via the mechanism of band termination. A possible strongly deformed triaxial band occurs at these high spins, which indicates collectivity beyond 50 (h) over bar. The high-spin data are interpreted within the framework of cranked Nilsson-Strutinsky calculations. (Less)

Please use this url to cite or link to this publication: https://lup.lub.lu.se/record/2271946

author

Mustafa, M. ; Ollier, J. ; Simpson, J. ; Riley, M. A. ; Paul, E. S. ; Wang, X. ; Aguilar, A. ; Carpenter, M. P. ; Darby, I. G. and Hartley, D. J. , et al. (More)

Mustafa, M. ; Ollier, J. ; Simpson, J. ; Riley, M. A. ; Paul, E. S. ; Wang, X. ; Aguilar, A. ; Carpenter, M. P. ; Darby, I. G. ; Hartley, D. J. ; Janssens, R. V. F. ; Kondev, F. G. ; Lauritsen, T. ; Nolan, P. J. ; Petri, M. ; Rees, J. M. ; Revill, J. P. ; Rigby, S. V. ; Teal, C. ; Thomson, J. ; Unsworth, C. ; Zhu, S. ; Carlsson, Gillis ^LU ; Ma, Hailiang ^LU ; Mufti, Tajdar ^LU and Ragnarsson, Ingemar ^LU (Less)

organization

Mathematical Physics

publishing date

2011

type

Contribution to journal

publication status

published

subject

Physical Sciences

in

Physical Review C (Nuclear Physics)

volume

84

issue

5

publisher

American Physical Society

external identifiers

wos:000297297000002
scopus:82955189138

ISSN

0556-2813

DOI

10.1103/PhysRevC.84.054320

language

English

LU publication?

yes

additional info

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)

id

09903458-2879-47b9-826b-32b5f10650ca (old id 2271946)

date added to LUP

2016-04-01 13:47:31

date last changed

2022-04-14 03:10:52

@article{09903458-2879-47b9-826b-32b5f10650ca,
  abstract     = {{A spectroscopic investigation of the gamma decays from excited states in Er-159 has been performed to study the changing structural properties exhibited as ultrahigh spins (I &gt; 60 (h) over bar) are approached. The nucleus of Er-159 was populated by the reaction Cd-116(Ca-48, 5n gamma) at a beam energy of 215 MeV, and the resulting gamma decays were studied using the Gammasphere spectrometer. New rotational bands and extensions to existing sequences were observed, which are discussed in terms of the cranked shell model, revealing a diverse range of quasiparticle configurations. At spins around 50 (h) over bar, there is evidence for a change from dominant prolate collective motion at the yrast line to oblate non-collective structures via the mechanism of band termination. A possible strongly deformed triaxial band occurs at these high spins, which indicates collectivity beyond 50 (h) over bar. The high-spin data are interpreted within the framework of cranked Nilsson-Strutinsky calculations.}},
  author       = {{Mustafa, M. and Ollier, J. and Simpson, J. and Riley, M. A. and Paul, E. S. and Wang, X. and Aguilar, A. and Carpenter, M. P. and Darby, I. G. and Hartley, D. J. and Janssens, R. V. F. and Kondev, F. G. and Lauritsen, T. and Nolan, P. J. and Petri, M. and Rees, J. M. and Revill, J. P. and Rigby, S. V. and Teal, C. and Thomson, J. and Unsworth, C. and Zhu, S. and Carlsson, Gillis and Ma, Hailiang and Mufti, Tajdar and Ragnarsson, Ingemar}},
  issn         = {{0556-2813}},
  language     = {{eng}},
  number       = {{5}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C (Nuclear Physics)}},
  title        = {{Diverse collective excitations in Er-159 up to high spin}},
  url          = {{http://dx.doi.org/10.1103/PhysRevC.84.054320}},
  doi          = {{10.1103/PhysRevC.84.054320}},
  volume       = {{84}},
  year         = {{2011}},
}

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Diverse collective excitations in Er-159 up to high spin