Advanced

Systematics of Even-even Tz=1 Nuclei in the A=80 Region: High-spin Rotational Bands in 74Kr, 78Sr, and 82Zr

Rudolph, Dirk LU ; Baktash, C.; Gross, C. J.; Satula, W.; Wyss, R.; Birriel, I.; Devlin, M.; Jin, H. Q.; LaFosse, D. R. and Lerma, F., et al. (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)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C (Nuclear Physics)
volume
56
issue
1
pages
98 - 117
publisher
American Physical Society
external identifiers
  • scopus:0031497935
ISSN
0556-2813
DOI
10.1103/PhysRevC.56.98
language
English
LU publication?
no
id
9ea5739a-9794-4e75-8ef2-62a705bf30a9 (old id 3964386)
alternative location
http://link.aps.org/doi/10.1103/PhysRevC.56.98
date added to LUP
2013-08-13 18:50:17
date last changed
2017-01-01 06:54:39
@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},
  volume       = {56},
  year         = {1997},
}