Systematics of Even-even Tz=1 Nuclei in the A=80 Region: High-spin Rotational Bands in 74Kr, 78Sr, and 82Zr
(1997) In Physical Review C (Nuclear Physics) 56(1). p.98-117- Abstract
- High-spin states of T-z = 1 nuclei were studied with the reactions Ni-58(Si-28,3 alpha)Kr-74,Ni-58(Si-28,2 alpha)Sr-78, and Ni-58(Si-28,2p2n)Zr-82 at 130 MeV beam energy. The Gammasphere array in conjunction with the 4 pi charged-particle detector array Microball was used to detect gamma rays in coincidence with evaporated light charged particles. The known pi = +, alpha = 0 yrast bands were extended to I = 28 (h) over bar at 20 MeV excitation energy. For all three nuclei, a number of positive- and negative-parity sidebands were established; altogether 15 new rotational bands were found. The data are discussed using the pairing-and-deformation self-consistent total Routhian surface (TRS) model: High-spin structures of Kr-74 and Sr-78 are... (More)
- High-spin states of T-z = 1 nuclei were studied with the reactions Ni-58(Si-28,3 alpha)Kr-74,Ni-58(Si-28,2 alpha)Sr-78, and Ni-58(Si-28,2p2n)Zr-82 at 130 MeV beam energy. The Gammasphere array in conjunction with the 4 pi charged-particle detector array Microball was used to detect gamma rays in coincidence with evaporated light charged particles. The known pi = +, alpha = 0 yrast bands were extended to I = 28 (h) over bar at 20 MeV excitation energy. For all three nuclei, a number of positive- and negative-parity sidebands were established; altogether 15 new rotational bands were found. The data are discussed using the pairing-and-deformation self-consistent total Routhian surface (TRS) model: High-spin structures of Kr-74 and Sr-78 are governed by the shell gaps at large prolate deformation while Zr-82 seems to exhibit shape coexistence. Nearly identical bands were established which may be explained as arising from the fp orbits acting as spectators at very elongated shapes. The experimental data in these T-z = 1 nuclei are in good agreement with predictions of the TRS model using conventional T = 1 like-nucleon pairing correlations. (Less)
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- publishing date
- 1997
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- Contribution to journal
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- published
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- in
- Physical Review C (Nuclear Physics)
- volume
- 56
- issue
- 1
- pages
- 98 - 117
- publisher
- American Physical Society
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- scopus:0031497935
- ISSN
- 0556-2813
- DOI
- 10.1103/PhysRevC.56.98
- language
- English
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@article{9ea5739a-9794-4e75-8ef2-62a705bf30a9, abstract = {{High-spin states of T-z = 1 nuclei were studied with the reactions Ni-58(Si-28,3 alpha)Kr-74,Ni-58(Si-28,2 alpha)Sr-78, and Ni-58(Si-28,2p2n)Zr-82 at 130 MeV beam energy. The Gammasphere array in conjunction with the 4 pi charged-particle detector array Microball was used to detect gamma rays in coincidence with evaporated light charged particles. The known pi = +, alpha = 0 yrast bands were extended to I = 28 (h) over bar at 20 MeV excitation energy. For all three nuclei, a number of positive- and negative-parity sidebands were established; altogether 15 new rotational bands were found. The data are discussed using the pairing-and-deformation self-consistent total Routhian surface (TRS) model: High-spin structures of Kr-74 and Sr-78 are governed by the shell gaps at large prolate deformation while Zr-82 seems to exhibit shape coexistence. Nearly identical bands were established which may be explained as arising from the fp orbits acting as spectators at very elongated shapes. The experimental data in these T-z = 1 nuclei are in good agreement with predictions of the TRS model using conventional T = 1 like-nucleon pairing correlations.}}, author = {{Rudolph, Dirk and Baktash, C. and Gross, C. J. and Satula, W. and Wyss, R. and Birriel, I. and Devlin, M. and Jin, H. Q. and LaFosse, D. R. and Lerma, F. and Saladin, J. X. and Sarantites, D. G. and Sylvan, G. N. and Tabor, S. L. and Winchell, D. F. and Wood, V. Q. and Yu, C. H.}}, issn = {{0556-2813}}, language = {{eng}}, number = {{1}}, pages = {{98--117}}, publisher = {{American Physical Society}}, series = {{Physical Review C (Nuclear Physics)}}, title = {{Systematics of Even-even Tz=1 Nuclei in the A=80 Region: High-spin Rotational Bands in 74Kr, 78Sr, and 82Zr}}, url = {{http://dx.doi.org/10.1103/PhysRevC.56.98}}, doi = {{10.1103/PhysRevC.56.98}}, volume = {{56}}, year = {{1997}}, }