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2006年04月10日

【期刊论文】Search for Signature Inversion in the πil3/2⊗νil3/2 Band in Odd-Odd 178Ir*

张玉虎, ZHANG Yu-Hu, T. Hayakawa, M Oshima, Y. TOh, J. Katakura, Y. Hatsukawa, M Matsuda, N. Shinohara, T. Ishii, H Kusakari, M. Sugawara, T. Komatsubara, K. Furune

CHIN. PHYSLETT. Vol 18.No.10 (2001),-0001,():

-1年11月30日

摘要

The soarch for the πi13/2⊗νi13/2 band in 178Ir has been conducted through the 152Sm (31P, 5nγ)178Ir reaction and thc excitation functions,x-γ and γ-γ-t coincidence mcasurements. Five rotational bands have been nowly identified The low-spin signaturc inversion in the πi13/2⊗νi13/2 band has been confirmed by the observations of linking transitions and signaturc crossing at I=25.5h. The inversion phenonJenon in πh11/2⊗νi13/2, rcho/2⊗νi13/2 and πi13/2⊗νi13/2 structulcs in 178Ir provides a unique testing ground for diffbrent theorctical interpretations.

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2006年04月10日

【期刊论文】Signature inversion phenomena in odd-odd 182Au

张玉虎, Y.H. Zhang, a, F.R. Xu, J.J. He, Z. Liu, X.H. Zhou, Z.G. Gan, T. Hayakawa, M. Oshima, T. Toh, T. Shizuma, J. Katakura, Y. Hatsukawa, M. Matsuda, H. Kusakari, M. Sugawara, K. Furuno, T. Komatsubara, T. Une, S.X. Wen, and Z.M. Wang

Eur. Phys. J. A 14, 271-274 (2002),-0001,():

-1年11月30日

摘要

High-spin states in the odd-odd 182Au nucleus have been investigated using the 152Sm (35Cl, 5nγ)182Au reaction through X-γ and γ-γ-t coincidence measurements. Rotational bands based on the πh9/2⊗νi13/2 and πi13/2⊗νi13/2 configurations have been identified. It is found that the two bands show characteristics of low-spin signature inversion. The observed signature inversion can be well reproduced by pairing-deformation self-consistent cranking Woods-Saxon calculations.

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2006年04月10日

【期刊论文】High-spin states in odd-odd 170Ta

张玉虎, Y. H. Zhang, S. Q. Zhang, Q. Z. Zhao, S. F. Zhu, H. S. Xu, X. H. Zhou, Y. X. Guo, X. G. Lei, J. Lu, W. X. Huang, Q. B. Gou, H. J. Jin, Z. Liu, Y. X. Luo, X. F. Sun, and Y. T. Zhu X. G. Wu, S. X. Wen, and C. X. Yang

PHYSICAL REVIEW C, VOLUME 60, 044311,-0001,():

-1年11月30日

摘要

High-spin states in 170Ta have been studied via 159Tb(16O, 5nγ)170Ta reaction through excitation functions, K x-γ, and γ-γ-t coincidence measurements. Three rotational bands have been identified which consist of two strongly coupled bands and a semidecoupled one. The quasiparticle configurations of these bands and the interpretation of experimental results are discussed based on the existing knowledge of neighboring odd-mass and odd-odd nuclei and in the framework of the cranked-shell model. Low-spin signature inversion in the π9/2-[514]⊗ν5/2+[642] and π1/2-[541]⊗ν5/2+[642] bands are discussed. A delay reduction of the band-crossing frequency is observed in the π1/2-[541]⊗ν5/2+[642] (π5/2+[402]⊗ν5/2-[642]) band. This configuration-dependent crossing frequency is discussed in comparison with the AB crossing frequencies in the related bands of neighboring odd-Z isotopes.

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2006年04月10日

【期刊论文】Low-spin signature inversion in the πh9/2⊗νi13/2 oblate band of 190Tl

张玉虎, C. Y. Xie, , X. H. Zhou, ∗, Y. H. Zhang, Y. X. Guo, X. G. Lei, Y. Zheng, M. L. Liu, L. T. Song, H. L. Wang, W. T. Guo, H. P. Yu, L. H. Zhu, X. G. Wu, and F. R. Xu

PHYSICAL REVIEW C 72, 044302 (2005),-0001,():

-1年11月30日

摘要

High-spin states in 190Tl have been studied experimentally by using the 160Gd(35Cl,5n) fusion-evaporation reaction at beam energies of 167 and 175 MeV. A rotational band built on the πh9/2⊗νi13/2 configuration with oblate deformation has been established for 190Tl. Spin values are assigned by adopting the results from α-γ decay work for 194Bi found in the literature.With the configuration and spin-parity assignments, the low-spin signature inversion has been revealed for the πh9/2⊗νi13/2 oblate band in 190Tl. It is the first experimental observation of low-spin signature inversion for a band associated with the oblate πh9/2⊗νi13/2 configuration. The low-spin signature inversion for the oblate πh9/2⊗νi13/2 band can be interpreted by the two-quasiparticle-plus-rotor model including a J-dependent p-n residual interaction.

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2006年04月10日

【期刊论文】New yrast excited states of the N=84 nucleus 142Ce observed in deep inelastic reactions

张玉虎, Z. Liu, a, Y.H. Zhang, X.H. Zhou, M.L. Liu, W.J. Luo, Q.Y. Pan, Z.G. Gan, T. Hayakawa, M. Oshima, Y. Toh, T. Shizima, Y. Hatsukawa, A. Osa, T. Ishii, and M. Sugawara

Eur. Phys. J. A 13, 277-280 (2002),-0001,():

-1年11月30日

摘要

Excited states of 142Ce, populated in deep inelastic reactions of 82Se projectiles bombarding 139La target, have been studied up to medium spins using in-beam γ spectroscopy techniques. Three new levels have been identified at 2625, 2995, 3834 keV, and assigned as 8+, 9(−) and 11(−), respectively. These new yrast states follow closely the level systematics of the even mass N=84 isotones. Their strctures have been discussed with the help of empirical shell model calculations.

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    中国科学院近代物理研究所,甘肃

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