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- Paul, E. S. (author)
Loss of collectivity in the transitional Er-156 nucleus at high spin
- Article/chapterEnglish2009
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- 2009
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- LIBRIS-ID:oai:lup.lub.lu.se:4566e3b8-9056-4f64-ac3d-8ad8abfe144e
- https://lup.lub.lu.se/record/1441922URI
- https://doi.org/10.1103/PhysRevC.79.044324DOI
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- Language:English
- Summary in:English
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- The Cd-114(Ca-48, 6n gamma) reaction at 215 MeV has been investigated using the Gammasphere spectrometer to study the high-spin structure of the nucleus Er-156(68)88. Many new transitions have been established along with 68 definitive spin-parity level assignments from a high-fold angular-distribution analysis. In addition, absolute B(M 1) and B(E 1) strengths have been inferred from measured gamma-ray branching ratios. Strong B(E 1) strength (10(-3) W.u.) is discussed in terms of possible octupole collectivity at low spin. At high spin, this nucleus undergoes a Coriolis-induced shape transition from a prolate state of collective rotation to a noncollective, triaxial-oblate configuration. The yrast positive-parity structure ultimately terminates in an energetically favored oblate state at I-pi = 42(+). Several weak high-energy gamma-ray transitions have been discovered that feed this favored state. State-of-the-art cranked Nilsson-Strutinsky calculations are used to interpret the high-spin behavior of Er-156 and comparisons are made with other N = 88 isotones.
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- NATURVETENSKAP Fysik hsv//swe
- NATURAL SCIENCES Physical Sciences hsv//eng
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- Rigby, S. V. (author)
- Riley, M. A. (author)
- Simpson, J. (author)
- Appelbe, D. E. (author)
- Campbell, D. B. (author)
- Choy, P. T. W. (author)
- Clark, R. M. (author)
- Cromaz, M. (author)
- Evans, A. O. (author)
- Fallon, P. (author)
- Goergen, A. (author)
- Joss, D. T. (author)
- Lee, I. Y. (author)
- Macchiavelli, A. O. (author)
- Nolan, P. J. (author)
- Pipidis, A. (author)
- Ward, D. (author)
- Ragnarsson, IngemarLund University,Lunds universitet,Matematisk fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematical Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)matf-ira (author)
- Matematisk fysikFysiska institutionen (creator_code:org_t)
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- In:Physical Review C (Nuclear Physics)79:40556-2813
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- Choy, P. T. W.
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