Chinese Physics C > 2003, Vol. 27 > Issue(7): 574-580

Experimental Study of High-Spin Band Structures in Odd-Odd¹⁷²Re

ZHANG Yu-Hu^,,
ZHOU Xiao-Hong

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000,China2 Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195,Japan3 Department of Physics, Kyushu University, Fukuoka, 812-81,Japan4 Chiba Institute of Technology, Narashino, Chiba 275-0023,Japan5 Chiba University, Inage-ku, Chiba 263-8512, Japan6 Institute of Physics and Tandem Accelerator Center, University of Tsukuba, Ibaraki 305-0006,Japan

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Abstract：
High-spin states in odd-odd ¹⁷²Re have been investigated via the ¹⁴⁹Sm( ²⁷Al,4nγ) ¹⁷²Re reaction through excitation functions, X-γ and γ-γ coincidence measurements. A level scheme consisting of three rotational bands has been identified for the first time,extending the high-spin studies of A≈170 odd-odd nuclei to the currently lightest rhenium isotope. The three bands have been assigned to be built on the πh _11/2⊙νi _13/2,πh _9/2⊙νi _13/2and π1/2 ^－[541]⊙ν1/2 ^－[521] configurations according to their rotational properties in quasiparticle alignments, signature splitting, in-band B(M1)/B(E2) ratios, level spacing systematics, band crossing frequencies, as well as the existing knowledge in neighboring nuclei. Low-spin signature inversion has been confirmed in the first two bands due to observation of signature crossing at high-spin states.

References

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ZHANG Yu-Hu and ZHOU Xiao-Hong. Experimental Study of High-Spin Band Structures in Odd-Odd ¹⁷²Re[J]. Chinese Physics C, 2003, 27(7): 574-580.

ZHANG Yu-Hu and ZHOU Xiao-Hong. Experimental Study of High-Spin Band Structures in Odd-Odd ¹⁷²Re[J]. Chinese Physics C, 2003, 27(7): 574-580. shu

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Received: 2002-09-29
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

Experimental Study of High-Spin Band Structures in Odd-Odd¹⁷²Re

Corresponding author:ZHANG Yu-Hu,

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000,China2 Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195,Japan3 Department of Physics, Kyushu University, Fukuoka, 812-81,Japan4 Chiba Institute of Technology, Narashino, Chiba 275-0023,Japan5 Chiba University, Inage-ku, Chiba 263-8512, Japan6 Institute of Physics and Tandem Accelerator Center, University of Tsukuba, Ibaraki 305-0006,Japan

Received Date:2002-09-29

Accepted Date:1900-01-01

Available Online:2003-07-05

Abstract:High-spin states in odd-odd¹⁷²Re have been investigated via the¹⁴⁹Sm(²⁷Al,4nγ)¹⁷²Re reaction through excitation functions, X-γ and γ-γ coincidence measurements. A level scheme consisting of three rotational bands has been identified for the first time,extending the high-spin studies of A≈170 odd-odd nuclei to the currently lightest rhenium isotope. The three bands have been assigned to be built on the πh_11/2⊙νi_13/2,πh_9/2⊙νi_13/2and π1/2^－[541]⊙ν1/2^－[521] configurations according to their rotational properties in quasiparticle alignments, signature splitting, in-band B(M1)/B(E2) ratios, level spacing systematics, band crossing frequencies, as well as the existing knowledge in neighboring nuclei. Low-spin signature inversion has been confirmed in the first two bands due to observation of signature crossing at high-spin states.

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Experimental Study of High-Spin Band Structures in Odd-Odd¹⁷²Re

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