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Doubly Decoupled Structure in Odd-Odd ^(178-186)Ir Nuclei

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Chinese Physics Letters 2001年第1期18卷 27-29页

作者： 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 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 Japan Atomic Energy Research Institute TokaiIbaraki 319-1195Japan Chiba University Inage-kuChiba 263-8512Japan Japan Chiba Institute of Technology NarashinoChiba 275-0023Japan Institute of Physics and Tandem Accelerator Center University of TsukubaIbaraki 305-0006Japan

High-spin states in 178'180Ir have been studied via the 152'154Sm(31P,5nγ)reactions through excitation functions,x-γandγ-γ-t coincidence measurements.A doubly decoupled band has been identified in each of the *** level spacings for such structures in odd-odd ^(178-186)Ir have been inspected and thus a regular level staggering as a function of the neutron number is *** particular phenomenon may be associated with bandmixing at lower excitation energies.

关键词： excitation coincidence

Systematic Properties of the 1／2[660]^i13／2 Bands in Odd-A Au Nuclei

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Chinese Physics Letters 2004年第7期21卷 1243-1246页

作者： SONGLi-Tao ZHOUXiao-Hong ZHANGyu-Hu GUOying-Xiang SUNZhi-yu M.Oshima T.Toh A.Osa M.Koizumi J.Katakura y.hatsukawa M.Matsuda M.Sugawara 1nstituteofModernPhysics ChineseAcademyofSciencesLanzhou730000 JapanAtomicEnergyResearchInstitute TokaiIbaraki319-1195Japan ChibaInstituteofTechnology NarashinoChiba275-0023Japan

A standard in-beam γ-spectroscopy experiment for 179Au has been performed via the 149Sm (35Cl, 5n) reaction at beam energies of 164–180MeV. Based on the analysis of the experimental results, a rotational band built on the 1/2[660](πi13/2) proton intruder orbital is established for 179Au for the first time. Systematic properties of the 1/2[660](i13/2) band in odd-A Au nuclei are discussed, and the evolution of bandhead energy and deformation with changing neutron number are revealed.

关键词： Ultraviolet spectroscopy

Search for Signature Inversion in the πi_(13/2) vi_(13/2) Band in Odd-Odd ^(178I)r

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Chinese Physics Letters 2001年第10期18卷 1323-1326页

作者： 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.Furuno Institute of Modern Physics:Chinese Academy of Sciences Lanzhou 7300002 Japan Atomic Energy Research Institute TokaiIbaraki 319-1195Japan Chiba University Inage-kuChiba 263-8512Japan Chiba Institute of Technology NarashinoChiba 275-0023Japan Institute of Physics and Tandem Accelerator Center University of TsukubaIbaraki 305-0006Japan

The search for the ri_(13/2) vi_(13/2 ) band in ^(178)Ir has been conducted through the ^(152)Sm(^(31) P, 5nγ)^( 178)Ir reaction and the excitation functions, x-γ and γ-γ-t coincidence measurements. Five rotational bands have been newly identified. The low-spin signature inversion in the πi13/2 vi13/2 band has been confirmed by the observations of linking transitions and signature crossing at I = 25.5 h. The inversion phenomenon in rh11/2 vi_(13/2), rh9/2 vi_(13/2) and ri_(13/2) vi13/2 structures in ^(178)Ir provides a unique testing ground for different theoretical interpretations.

关键词： signature Inversion

Negative Parity Bands and Signature Splitting Inversion in ^80Rb

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Chinese Physics Letters 2003年第11期20卷 1932-1935页

作者：袁观俊杨春祥王月张振龙孟锐 M.Oshima y.Toh A.Osa M.Koizumi y.hatsukawa M.Matsuda T.Hagakawa M.M.Ndontcheng 温书贤贺创业竺礼华王治民李广生马瑞刚吴晓光 DepartmentofPhysics JinlinUniversityChangchun130023 JapanAtomicEnergyResearchInstitute TokaiJapan DepartmentofPhysics UniversityofDoualaDoualaCameroun ChinaInstituteofAtomicEnergy Beijing102413

High spin states in 80Rb were studied via the 65Cu+19F, 66Zn+18O and 68Zn+16O reactions. The 75-MeV 19F, 76-MeV 18O and 80-MeV 16O beams were provided by the CIAE HI-13 Tandem accelerator and the JAERI Tandem accelerator. The prompt γ-γ coincidence and the directional correlation from oriented nuclei (DCO) were measured by the detector arrays in CIAE and JAERI. Twenty-three new states with 28 new transitions have been assigned to 80Rb. The states were observed up to spins of 20+ and 22− in the α = 0 branch for the positive and negative parity yrast bands respectively. The negative parity non-yrast bands were significantly extended up to spins of 22− and 15−. The band crossings with frequencies 0.51MeV and 0.61MeV in the α = 0 cascade were observed for the first time. The signature splitting was observed in both negative parity bands. The signature inversions at spins of about 7 and 15 were observed.

关键词： HIGH-SPIN STATES

形变双奇核^(178)Ir转动带能级的旋称反转

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高能物理与核物理 2000年第12期24卷 1123-1130页

作者：张玉虎 T.Hayakawa M.Oshima y.Toh J.Katakura y.hatsukawa M.Matsuda N.Shinohara T.Ishii H.Kusakari M.Sugawara T.Komatsubara 中国科学院近代物理研究所兰州730000 Japan Atomic Energy Research Institute Chiba University Chiba Institute of Technology Institute of Physics and Tandem Accelerator Center

利用１５２Ｓｍ（３１Ｐ，５ｎγ）１７８Ｉｒ反应产生并研究了双奇核１７８Ｉｒ的高自旋态．实验中进行了１７８Ｉｒ核的在束 γ测量，包括γ射线的激发函数测量、Ｘ－γ和γ－γ符合测量．首次建立了双奇核１７８Ｉｒ基于πｈ９／２... 详细信息

利用１５２Ｓｍ（３１Ｐ，５ｎγ）１７８Ｉｒ反应产生并研究了双奇核１７８Ｉｒ的高自旋态．实验中进行了１７８Ｉｒ核的在束 γ测量，包括γ射线的激发函数测量、Ｘ－γ和γ－γ符合测量．首次建立了双奇核１７８Ｉｒ基于πｈ９／２νｉ１３／２和πｈ１１／２νｉ１３／２准粒子组态上的转动带能级纲图．发现在低自旋区，两个转动带能级均出现旋称反转．对此核区半退耦带的旋称反转作了简要的分析和讨论．

关键词：在束γ谱学形变双奇核转动带旋称反转

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A≈110质量区奇A核形状演化研究

原子核物理评论 2011年第1期28卷 41-43页

作者：周厚兵周小红张玉虎郑勇李广顺 M.Oshi ma y.Toh M.Koizumi A.Osa y.hatsukawa 中国科学院近代物理研究所甘肃兰州730000 中国科学院研究生院北京100049 Japan Atomic Energy Agency Tokai

应用E-GOS(E-Gamma Over Spin)曲线方法研究了A≈110质量区奇A核结构随角动量增加的演化,发现随着角动量的增加原子核的激发特性从振动逐渐演化为转动。

关键词： E-GOS曲线相变形状演化

Identification of a New Four-Quasiparticle State in Odd-Odd 186Au

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Chinese Physics Letters 2012年第2期29卷 63-66页

作者： LI Shi-Cheng SHI yue ZHANG yu-Hu ZHOU Xiao-Hong XU Fu-Rong FANG yong-De LIU Min-Liang DING Bing GUO Song LI Guang-Shun ZHOU Hou-Bing M.Oshima y.Toh M.Koizumi A.Osa A.Kimura y.hatsukawa H.Hayakawa T.Shizuma J.Katakura M.Matsuda T.Morikawa M.Sugawara H.Kusakari Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 Graduate University of Chinese Academy of Sciences Beijing 100049 School of Physics and State Key Laboratory of Nuclear Physics and TechnologyPeking UniversityBeijing 100871 Japan Atomic Energy Agency TokaiIbaraki 319-1195Japan Department of Physics Kyushu UniversityFukuoka812-81Japan Chiba Institute of Technology NarashinoChiba 275-0023Japan Chiba University Inage-kuChiba 263-8512Japan

The high-spin level structure of 186 Au is re-investigated by means of in-beam γ-ray spectroscopy via the 172 yb(19 F,5nγ )186 Au *** oblate bands previously reported are revised and extended to higher-spin states.A new Iπ =(20+) excited state has been identified and assigned to the πh-111/2 (×) vi-213/2h-19/2 *** total Routhian surface and cranked shell model calculations suggest that the πh-111/2 (×) vi-213/2h-19/2 band in 186Au has a non-axial deformation.

关键词： configuration deformation reaction

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双奇核^(188)Au的准粒子带结构研究

高能物理与核物理 2006年第2期30卷 99-104页

作者：方永得张玉虎 M.Oshima y.Toh 周小红 M.Koizumi A.Osa A.Kimura y.hatsukawa T.Morikawa M.Nakamura M.Sugawara H.Kusakari 中国科学院近代物理研究所 Japan Atomic Energy Research Institute TokaiIbaraki 319-1195Japan Department of Physics Kyushu UniversityFukuoka 812-81Japan Chiba Institute of Technology NarashinoChiba 275-0023Japan Chiba University Inage-kuChiba 263-8512Japan

利用在束γ谱学实验技术,通过173yb(19F,4nγ)反应布居了188Au的高自旋态,并对其准粒子带结构进行了研究．基于实验测量结果,对原有的双奇核188Au能级纲图做了较大的修改．通过系统性比较,对15+以上的能级结构进行了讨论．

关键词：在束γ谱学双奇核^188Au 高自旋态 γ形变

^(142)Ce的新激发态及其经验壳模型研究

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高能物理与核物理 2002年第10期26卷 1015-1020页

作者：刘忠张玉虎郭应祥周小红雷相国柳敏良罗万居何建军郑勇潘强岩甘再国罗亦孝 T.Hayakawa M.Oshima y.TohT.Shizima y.hatsukawa A.OsaT.Ishii M.Sugawara 中国科学院近代物理研究所兰州730000 JapanAtomicEnergyResearchInstitute ChibaInstituteofTechnology Narashino

利用 42 0MeV　82 Se轰击1 39La引起的深部非弹反应和在束γ谱学方法研究了1 4 2 Ce的中高自旋激发态 .识别出了激发能为 2 62 5,2 995和 3 83 4keV的 3个新能级 ,自旋、宇称分别被指定为 8+,9(- ) 和 1 1 (- ) .发现这些能级非常好地符... 详细信息

利用 42 0MeV　82 Se轰击1 39La引起的深部非弹反应和在束γ谱学方法研究了1 4 2 Ce的中高自旋激发态 .识别出了激发能为 2 62 5,2 995和 3 83 4keV的 3个新能级 ,自旋、宇称分别被指定为 8+,9(- ) 和 1 1 (- ) .发现这些能级非常好地符合N=84偶偶核转晕能级的系统性 .利用经验壳模型计算了1 4 2 Ce的中高自旋激发态的激发能 ,计算结果比较好地重现了实验值 .对它们的结构进行了讨论 ,表明在1 4 2

关键词： ^142Ce 深部非弹反应转晕激发态经验壳模型在束γ谱学方法铈中子素重离子原子核