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Decay of the High-K Isomeric State to a Rotational Band in 257Rf

Rissanen, J.; Clark, R. M.; Gregorich, K. E.; Gates, J. M.; Campbell, C. M.; Crawford, H. L.; Cromaz, M.; Esker, N. E.; Fallon, P. and Forsberg, Ulrika LU , et al. (2013) In Physical Review C (Nuclear Physics) 88(4).
Abstract
The 257Rf isotope has been populated via the 208Pb(50Ti, n) fusion-evaporation reaction and delayed gamma-ray and electron decay spectroscopy has been performed. The existence of a high-K isomeric state in 257Rf has been confirmed. The isomeric state decays into a rotational band based on the 11/2(-)[725] excitation, which was observed up to spin of (23/2(-)). Three multipolarity-E1 gamma transitions depopulating the isomeric state have been observed, which fixes the spin for that state to (21/2(+)). This assignment agrees with theoretical predictions calculated with the microscopic-macroscopic approach, which suggest the isomeric state to be formed by coupling an unpaired 11/2(-)[725] quasineutron to the (1/2(-)[521] circle times... (More)
The 257Rf isotope has been populated via the 208Pb(50Ti, n) fusion-evaporation reaction and delayed gamma-ray and electron decay spectroscopy has been performed. The existence of a high-K isomeric state in 257Rf has been confirmed. The isomeric state decays into a rotational band based on the 11/2(-)[725] excitation, which was observed up to spin of (23/2(-)). Three multipolarity-E1 gamma transitions depopulating the isomeric state have been observed, which fixes the spin for that state to (21/2(+)). This assignment agrees with theoretical predictions calculated with the microscopic-macroscopic approach, which suggest the isomeric state to be formed by coupling an unpaired 11/2(-)[725] quasineutron to the (1/2(-)[521] circle times 9/2(+)[624])(5)- two-quasiproton state. The same two-quasiproton excitation is possible for the lowest isomer in 256Rf. (Less)
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Physical Review C (Nuclear Physics)
volume
88
issue
4
publisher
American Physical Society
external identifiers
  • wos:000325581000003
  • scopus:84885709338
ISSN
0556-2813
DOI
10.1103/PhysRevC.88.044313
language
English
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yes
id
2b9805dd-a81e-4bc2-8d7b-cb5d8d8482f1 (old id 4160048)
date added to LUP
2013-12-04 11:43:32
date last changed
2019-03-08 02:26:19
@article{2b9805dd-a81e-4bc2-8d7b-cb5d8d8482f1,
  abstract     = {The 257Rf isotope has been populated via the 208Pb(50Ti, n) fusion-evaporation reaction and delayed gamma-ray and electron decay spectroscopy has been performed. The existence of a high-K isomeric state in 257Rf has been confirmed. The isomeric state decays into a rotational band based on the 11/2(-)[725] excitation, which was observed up to spin of (23/2(-)). Three multipolarity-E1 gamma transitions depopulating the isomeric state have been observed, which fixes the spin for that state to (21/2(+)). This assignment agrees with theoretical predictions calculated with the microscopic-macroscopic approach, which suggest the isomeric state to be formed by coupling an unpaired 11/2(-)[725] quasineutron to the (1/2(-)[521] circle times 9/2(+)[624])(5)- two-quasiproton state. The same two-quasiproton excitation is possible for the lowest isomer in 256Rf.},
  articleno    = {044313},
  author       = {Rissanen, J. and Clark, R. M. and Gregorich, K. E. and Gates, J. M. and Campbell, C. M. and Crawford, H. L. and Cromaz, M. and Esker, N. E. and Fallon, P. and Forsberg, Ulrika and Gothe, O. and Lee, I. -Y. and Liu, H. L. and Machiavelli, A. O. and Mudder, P. and Nitsche, H. and Pang, G. and Rice, A. and Rudolph, Dirk and Stoyer, M. A. and Wiens, A. and Xu, F. R.},
  issn         = {0556-2813},
  language     = {eng},
  number       = {4},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {Decay of the High-K Isomeric State to a Rotational Band in 257Rf},
  url          = {http://dx.doi.org/10.1103/PhysRevC.88.044313},
  volume       = {88},
  year         = {2013},
}