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2006年04月10日

【期刊论文】Observation of the πh11/2⊗νi13/2 band in odd-odd 170Re

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

PHYSICAL REVIEW C 70, 064306 (2004)，-0001，（）：

-1年11月30日

摘要

High-spin states in doubly odd 170Re have been populated via the 142Nd(32S, p3nγ) reaction at beam energies of 155 and 166 MeV. K X-γ and γ-γ coincidences have been measured using a detector array consisting of 12 high-purity germanium detectors with BGO suppressors. A rotational band is identified and assigned to 170Re for the first time. This band is proposed to be built on the πh11/2⊗νi13/2 two-quasiparticle configuration by comparing the band properties with known bands in neighboring nuclei and the cranked-shell model calculations.

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2006年04月10日

【期刊论文】Observation of signature inversion in odd-odd 178Ir

张玉虎， Y.H. Zhang， a， T. Hayakawa， M. Oshima， Y. Toh， J. Katakura， Y. Hatsukawa， M. Matsuda， N. Shinohara， T. Ishii， H. Kusakari， M. Sugawara， and T. Komatsubara

Eur. Phys. J. A 8, 439-442 (2000)，-0001，（）：

-1年11月30日

摘要

High spin states in 178Ir have been studied via the 152Sm (31P,5nγ) 178Ir reaction through excitation functions, X-γ and γ-γ-t coincidence measurements. According to the band structure characteristics and the measured intraband B(M1)/B(E2) ratios, two rotational bands are identiﬁed and assigned to be associated with the πh9/2⊗νi13/2 and πh11/2⊗νi13/2 conﬁgurations, respectively. Both bands show the signature inversion feature.

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2006年04月10日

【期刊论文】Observation of High-j Two-Quasiparticle Bands in Odd-Odd 174Re

张玉虎， ZHANG Yu-Hu**， GUO Song，， ZHOU Xiao-Hong， MA Long， Oshima M.， Toh Y.， koizumi M.， Osa A.， Kimura A.， Hatsukawa Y.， Sugawara M.， Kusakari H.

，-0001，（）：

-1年11月30日

摘要

High spin states in 174Re have been investigated via the 152Sm (27Al, 5nγ) 174Re reaction. Gamma-ray excitation functions, x-γ and γ-γ coincidences have been measured. Two rotational bands built on the πh9=2⊗νi13=2 and πh11=2⊗νi13=2 con gurations have been identi ed and extended up to high-spin states. The relative spin and parity of the band levels have been unambiguously xed due to observations of several inter-band transitions. Both the bands show the low-spin signature inversion, which is consistent with systematic expectations for the high-j two-quasiparticle bands in the A=170 mass region.

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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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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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