Advanced

High-spin Shell-model States in the Isotope 90Tc

Rudolph, Dirk LU ; Gross, C. J.; Kabadiyski, M. K.; Lieb, K. P.; Weiszflog, M.; Grawe, H.; Heese, J.; Maier, K. H. and Eberth, J. (1993) In Physical Review C (Nuclear Physics) 47(6). p.2574-2585
Abstract
High spin states in the nucleus Tc-90 have been identified for the first time via the fusion evaporation reaction (Ni(Ar,3pn)Tc)-Ni-58-Ar-36-Tc-90, at 149 MeV beam energy. The OSIRIS spectrometer with an additional high purity Ge detector at 162-degrees and several particle detectors were used to measure gammagamma and particle-gammagamma coincidences, directional correlations of oriented states (DCO's), and line shapes due to Doppler-shift attenuation (DSA). Furthermore, an angular distribution experiment was performed with the reaction (Ni(Cl,2pn)Tc)-Ni-58-Cl-35-Tc-90, at 120 MeV beam energy. Some 90 transitions were placed into a level scheme comprising 45 levels reaching up to a possible spin I = 26hBAR at 11.2 MeV excitation energy.... (More)
High spin states in the nucleus Tc-90 have been identified for the first time via the fusion evaporation reaction (Ni(Ar,3pn)Tc)-Ni-58-Ar-36-Tc-90, at 149 MeV beam energy. The OSIRIS spectrometer with an additional high purity Ge detector at 162-degrees and several particle detectors were used to measure gammagamma and particle-gammagamma coincidences, directional correlations of oriented states (DCO's), and line shapes due to Doppler-shift attenuation (DSA). Furthermore, an angular distribution experiment was performed with the reaction (Ni(Cl,2pn)Tc)-Ni-58-Cl-35-Tc-90, at 120 MeV beam energy. Some 90 transitions were placed into a level scheme comprising 45 levels reaching up to a possible spin I = 26hBAR at 11.2 MeV excitation energy. Definite spin assignments for more than half of the levels were made via angular distribution coefficients and DCO ratios. Shell model calculations were performed in a restricted configuration space consisting of only the P1/2 and g9/2 orbitals. The level scheme can be reproduced very well up to spin I = 21hBAR. The predicted structure of the states is discussed and compared to those of neighboring isotopes. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C (Nuclear Physics)
volume
47
issue
6
pages
2574 - 2585
publisher
American Physical Society
external identifiers
  • scopus:4243973406
ISSN
0556-2813
DOI
10.1103/PhysRevC.47.2574
language
English
LU publication?
no
id
ee40e602-9f79-48c0-ab00-080995164673 (old id 3964540)
alternative location
http://link.aps.org/doi/10.1103/PhysRevC.47.2574
date added to LUP
2013-08-13 18:51:48
date last changed
2017-01-01 06:42:42
@article{ee40e602-9f79-48c0-ab00-080995164673,
  abstract     = {High spin states in the nucleus Tc-90 have been identified for the first time via the fusion evaporation reaction (Ni(Ar,3pn)Tc)-Ni-58-Ar-36-Tc-90, at 149 MeV beam energy. The OSIRIS spectrometer with an additional high purity Ge detector at 162-degrees and several particle detectors were used to measure gammagamma and particle-gammagamma coincidences, directional correlations of oriented states (DCO's), and line shapes due to Doppler-shift attenuation (DSA). Furthermore, an angular distribution experiment was performed with the reaction (Ni(Cl,2pn)Tc)-Ni-58-Cl-35-Tc-90, at 120 MeV beam energy. Some 90 transitions were placed into a level scheme comprising 45 levels reaching up to a possible spin I = 26hBAR at 11.2 MeV excitation energy. Definite spin assignments for more than half of the levels were made via angular distribution coefficients and DCO ratios. Shell model calculations were performed in a restricted configuration space consisting of only the P1/2 and g9/2 orbitals. The level scheme can be reproduced very well up to spin I = 21hBAR. The predicted structure of the states is discussed and compared to those of neighboring isotopes.},
  author       = {Rudolph, Dirk and Gross, C. J. and Kabadiyski, M. K. and Lieb, K. P. and Weiszflog, M. and Grawe, H. and Heese, J. and Maier, K. H. and Eberth, J.},
  issn         = {0556-2813},
  language     = {eng},
  number       = {6},
  pages        = {2574--2585},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {High-spin Shell-model States in the Isotope 90Tc},
  url          = {http://dx.doi.org/10.1103/PhysRevC.47.2574},
  volume       = {47},
  year         = {1993},
}