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Chinese Physics C> 2002, Vol. 26> Issue(10) : 991-997 

Rotational Bands in 169Re

  •  Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Japan Atomic Energy Research Institute, Tokai, Ibaraki 319 1195, Japan3 Chiba Institute of Technology, Narashino, Chiba 275 0023, Japan

  • The excited states of 169Re have been investigated by means of in beam γ-ray spectroscopy techniques with the 144Sm(28Si, 1p2nγ)169Re reaction. X-γ and γ-γ-t coincidences, DCO ratios and intra-band B(M1)/B(E2) ratios were measured. A strongly coupled band based on the 9/2－ Nilsson state and a decoupled band built on the h9/2 intruder proton orbital (nominally 1/2－) have been established. Their configurations are proposed on the basis of B(M1)/B(E2) ratios and by comparing the band properties with known bands in neighboring odd proton nuclei. The neutron AB crossings are observed at ω=0.23 and 0.27 MeV for the π9/2－ and π1/2－ bands, respectively. Band properties of the neutron AB crossing frequencies, alignment gains and signature splittings are discussed, and compared with those in the heavier odd-A Re isotopes.
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    [1] Bark R A, Dracoulis G D, Stuch6ery A E et al. Nucl. Phys.，1989, A501:1572 Carlsson H, Bergstr#246;m M, Brockstedt A et al.Nucl. Phys.，1993, A551:2953 Hildingsson L, Klamra W, Lindblad Th et al. Nucl. Phys，1990, A513:3944 Bengtswm R, Gatrett J D. International Review of Nuclear Physics, Vol.2, ad. EttBelend T. Rekatad J. Veaqen J S Singapore: World Scientific. 19895 Dracoulis G D. Fahricius B. Kibedi T et al .Contrih. Int. Conf. Nuclear Structure at High Angular Momentum, Ottawa, 1992.366 Shirlev V S. Nucl. Data Sheets, 1991.64:5057 Schmidt-Ott W D. Salewski H, Meissner F et al. Nucl. Phys.，1992. A545:6468 Furuno K, Oshima M, Komatsuhara T et al. Nucl. Instr. and Meth.，1999, A421:2119 Juutinen S. Ahonen P. Hattula J et al. Nucl. Phys.，1991，A526:34610 Mueller Vf F, Jin H Q, Lewis J M et al. Phys. Rev.，1999, 059:200911 Bark R A, Tnrmanen S. Back T et al. Nucl. Phys，1999, A657:11312 Bengtsson R. Frauendod S. Nucl. Phys..1979. A324:2713 Bengtsson R .Frauendod S. Nucl. Phys.，1979, A327:13914 Wells J C. Johnson N R. Baktash C et al Phys. Rev.，1989, 040:72515 Bark R A.Dracoulis G D. Stuchhery A E et al. Nucl. Phys.，1990. A514:50316 Theine K, Byme :A P, Hubel H et al .Nucl. Phys.，1992,A548:7117 D#246;nau F. Frauendurf S. Pros，Conf. nn High Angular Momentum Properties of Nuclei, Oak Ridge. 1982, ed Johnson N R.Yew York: Harwood Academic, 1983. 14318 Larabee A J, Courtney L H, Frauendnrf S et al. Phys. Rev.. 1984. C29: 19.1419 Dracoulis G D, Sprouse G D. Kianer O C et al.Phys. Rev.，1984. C29:1576

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ZHOU Xiao-Hong, ZHANG Yu-Hu and ZHENG Yong. Rotational Bands in 169Re[J]. Chinese Physics C, 2002, 26(10): 991-997.
ZHOU Xiao-Hong, ZHANG Yu-Hu and ZHENG Yong. Rotational Bands in 169Re[J]. Chinese Physics C, 2002, 26(10): 991-997. shu
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Received: 2002-04-16
Revised: 1900-01-01
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Rotational Bands in 169Re

    Corresponding author: ZHOU Xiao-Hong,
  • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Japan Atomic Energy Research Institute, Tokai, Ibaraki 319 1195, Japan3 Chiba Institute of Technology, Narashino, Chiba 275 0023, Japan
  • Received Date: 2002-04-16
  • Accepted Date: 1900-01-01
  • Available Online: 2002-10-05

Abstract: The excited states of 169Re have been investigated by means of in beam γ-ray spectroscopy techniques with the 144Sm(28Si, 1p2nγ)169Re reaction. X-γ and γ-γ-t coincidences, DCO ratios and intra-band B(M1)/B(E2) ratios were measured. A strongly coupled band based on the 9/2－ Nilsson state and a decoupled band built on the h9/2 intruder proton orbital (nominally 1/2－) have been established. Their configurations are proposed on the basis of B(M1)/B(E2) ratios and by comparing the band properties with known bands in neighboring odd proton nuclei. The neutron AB crossings are observed at ω=0.23 and 0.27 MeV for the π9/2－ and π1/2－ bands, respectively. Band properties of the neutron AB crossing frequencies, alignment gains and signature splittings are discussed, and compared with those in the heavier odd-A Re isotopes.

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