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

Rotational Bands in¹⁶⁹Re

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

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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 h _9/2intruder 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.

References

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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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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Rotational Bands in¹⁶⁹Re

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 of¹⁶⁹Re have been investigated by means of in beam γ-ray spectroscopy techniques with the¹⁴⁴Sm(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 h_9/2intruder 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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Rotational Bands in¹⁶⁹Re

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