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Multiple beta(-) decaying states in Re-194: Shape evolution in neutron-rich osmium isotopes

Al-Dahan, N.; Regan, P. H.; Podolyak, Zs.; Walker, P. M.; Alkhomashi, N.; Dracoulis, G. D.; Farrelly, G.; Benlliure, J.; Pietri, S. B. and Casten, R. F., et al. (2012) In Physical Review C (Nuclear Physics) 85(3).
Abstract
beta decays from heavy, neutron-rich nuclei with A similar to 190 have been investigated following their production via the relativistic projectile fragmentation of an E/A = 1 GeV Pb-208 primary beam on a similar to 2.5 g/cm(2) Be-9 target. The reaction products were separated and identified using the GSI FRagment Separator (FRS) and stopped in the RISING active stopper. gamma decays were observed and correlated with these secondary ions on an event-by-event basis such that gamma-ray transitions following from both internal (isomeric) and beta decays were recorded. A number of discrete, beta-delayed gamma-ray transitions associated with beta decays from Re-194 to excited states in Os-194 have been observed, including previously reported... (More)
beta decays from heavy, neutron-rich nuclei with A similar to 190 have been investigated following their production via the relativistic projectile fragmentation of an E/A = 1 GeV Pb-208 primary beam on a similar to 2.5 g/cm(2) Be-9 target. The reaction products were separated and identified using the GSI FRagment Separator (FRS) and stopped in the RISING active stopper. gamma decays were observed and correlated with these secondary ions on an event-by-event basis such that gamma-ray transitions following from both internal (isomeric) and beta decays were recorded. A number of discrete, beta-delayed gamma-ray transitions associated with beta decays from Re-194 to excited states in Os-194 have been observed, including previously reported decays from the yrast I-pi = (6(+)) state. Three previously unreported gamma-ray transitions with energies 194, 349, and 554 keV are also identified; these transitions are associated with decays from higher spin states in Os-194. The results of these investigations are compared with theoretical predictions from Nilsson multi-quasiparticle (MQP) calculations. Based on lifetime measurements and the observed feeding pattern to states in Os-194, it is concluded that there are three beta(-)-decaying states in Re-194. (Less)
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published
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Physical Review C (Nuclear Physics)
volume
85
issue
3
publisher
American Physical Society
external identifiers
  • wos:000301113800002
  • scopus:84863367192
ISSN
0556-2813
DOI
10.1103/PhysRevC.85.034301
language
English
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yes
id
3c622d19-6411-41f8-9c20-f4f5b83cc28e (old id 2517073)
date added to LUP
2012-05-09 13:20:04
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2017-10-08 03:59:41
@article{3c622d19-6411-41f8-9c20-f4f5b83cc28e,
  abstract     = {beta decays from heavy, neutron-rich nuclei with A similar to 190 have been investigated following their production via the relativistic projectile fragmentation of an E/A = 1 GeV Pb-208 primary beam on a similar to 2.5 g/cm(2) Be-9 target. The reaction products were separated and identified using the GSI FRagment Separator (FRS) and stopped in the RISING active stopper. gamma decays were observed and correlated with these secondary ions on an event-by-event basis such that gamma-ray transitions following from both internal (isomeric) and beta decays were recorded. A number of discrete, beta-delayed gamma-ray transitions associated with beta decays from Re-194 to excited states in Os-194 have been observed, including previously reported decays from the yrast I-pi = (6(+)) state. Three previously unreported gamma-ray transitions with energies 194, 349, and 554 keV are also identified; these transitions are associated with decays from higher spin states in Os-194. The results of these investigations are compared with theoretical predictions from Nilsson multi-quasiparticle (MQP) calculations. Based on lifetime measurements and the observed feeding pattern to states in Os-194, it is concluded that there are three beta(-)-decaying states in Re-194.},
  articleno    = {034301},
  author       = {Al-Dahan, N. and Regan, P. H. and Podolyak, Zs. and Walker, P. M. and Alkhomashi, N. and Dracoulis, G. D. and Farrelly, G. and Benlliure, J. and Pietri, S. B. and Casten, R. F. and Stevenson, P. D. and Gelletly, W. and Steer, S. J. and Garnsworthy, A. B. and Casarejos, E. and Gerl, J. and Wollersheim, H. J. and Grebosz, J. and Gorska, M. and Kojouharov, I. and Schaffner, H. and Algora, A. and Benzoni, G. and Blazhev, A. and Boutachkov, P. and Bruce, A. M. and Cullen, I. J. and Bacelar, A. M. Denis and Deo, A. Y. and Estevez, M. E. and Fujita, Y. and Hoischen, Robert and Kumar, R. and Lalkovski, S. and Liu, Z. and Mason, P. J. and Mihai, C. and Molina, F. and Muecher, D. and Rubio, B. and Tamii, A. and Tashenov, S. and Valiente-Dobon, J. J. and Woods, P. J.},
  issn         = {0556-2813},
  language     = {eng},
  number       = {3},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {Multiple beta(-) decaying states in Re-194: Shape evolution in neutron-rich osmium isotopes},
  url          = {http://dx.doi.org/10.1103/PhysRevC.85.034301},
  volume       = {85},
  year         = {2012},
}