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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：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 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

High-spin states in ^(190)Pt

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Chinese Physics C 2008年第1期32卷 31-33页

作者：马龙周小红 M.Oshima Y.toh 张玉虎郭应祥雷相国 M.Koizumi A.Osa t.hayakawa Y.Hatsukawa t.Shizuma M.Sugawara Institute of Modern Physics Chinese Academy of Sciences Japan Atomic Energy Research Institute.tokai Ibaraki 319-1195 Japan Japan Atomic Energy Research Institute tokai Ibaraki 319-1195Japan Chiba Institute of technology Narashino Chiba 275-0023Japan

the level structure of ^19Opt has been studied experimentally using the ^176yb （^18O, 4n） reaction at beam energies of 88 and 95 MeV. γ-γ-t coincidence measurements were carried out. Based on the analysis of t-t coincidence relationships, the level scheme of ^190Pt is extended to high-spin states. A new structure built on the 3413.6 keV 14＋ state has been observed, and the ＂vi13/2^-2 vh9/2^-1 vj （j = P3/2 or f5/2） configuration is tentatively assigned to it.

关键词： γ-γcoincidence γ-ray spectroscopy DCO ratio

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：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 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

Structure of the πg7／2[404]7／2^＋ Band in Odd Proton Nucleus ^123I

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Chinese Physics Letters 2004年第6期21卷 1024-1026页

作者： WANGShou-Yu MAYing-Jun t.Komatsubara LIUYun-Zuo ZHANGYu-Hu K.Furuno t.hayakawa J.Mukai Y.Iwata t.Morikawa G.B.Hagemann G.Sletten J.Nyberg D.Jerrestam H.J.Jensen J.Espino J.Gascon N.Gjφrup B.Cederwall P.O.tjφm DepartmentofPhysics JilinUniversityChangchun130023 InstituteofPhysicsandtandemAcceleratorCenter UniversityofTsukubaIbaraki305Japan InstituteofModernPhysics ChineseAcademyofSciencesLanzhou730000 DepartmentofPhysics FacultyofScienceHiroshimaUniversityHiroshima724Japan DepartmentofPhysics FacultyofScienceKyushuUniversityFukuoka812Japan NielsBohrInstitute TandemAcceleratorLaboratoryRisφDK-4000RoskildeDenmark ManneSiegbabnInstituteofPhysics S-10405StockholmSweden DepartmentofPhysics UniversityofOsloNorway

High spin states of the odd proton nucleus 123I have been populated in the reaction 116Cd(14N, 5n2p) at a beam energy of 65MeV. two previously known positive-parity ΔI = 2 sequences have been extended up to 31/2+ and 41/2+. In addition, a number of ΔI = 1 transitions linking the two ΔI = 2 sequences have been observed. It is suggested that both the ΔI = 2 sequences are built upon the oblate πg7/2[404]7/2+ Nilsson configuration.

关键词： SHAPE COEXIStENCE SPECtROSCOPY I-119

减小键合应力改进(GaAl)As可见光(740nm)激光器寿命

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半导体光电 1983年第3期 78-80页

作者： t.hayakawa 刘维芳

业已证明将顶层和衬底厚度调整到一适当值,可减小因键合工艺而引起的有源层应力。激射波长为740nm的(GaAI)As V形沟道衬底内部条形激光器在50℃的寿命试验说明:采用厚顶层(～40μm)和减薄了的衬底(～80μm)使其寿命得到很大改进。

关键词：有源层键合工艺外力封装工艺光激射器电子器件激光器 GaAl)As 激射波长 nm

MeV-and Sub-MeV-photon Sources Based on Compton Backscattering at SPring-8 and KPSI-JAEA

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原子核物理评论 2009年第S1期26卷 94-99页

作者： K.Kawase M.Kando t.hayakawa I.Daito S.Kondo t.Homma t.Kameshima H.Kotaki Y.Fukuda A.Faenov t.Shizuma S.V.Bulanov t.Kimura t.tajima M.Shoji S.Suzuki K.tamura H.Ohkuma Y.Arimoto t.Yorita M.Fujiwara S.Okajima Kansai Photon Science Institute Japan Atomic Energy Agency Japan Synchrotron Radiation Research Institute Department of Physics Osaka University Research Center for Nuclear Physics Osaka University

Recently we have constructed two facilities for generating photon beams in the MeV and sub-MeV energy regions by means of the Compton backscattering with a laser and an electron beam at SPring-8 and at Kansai Photon Science Institute of Japan Atomic Energy Agency(KPSI-JAEA). the MeV-photon source at SPring-8 consists of a continuous-wave optically-pumped far infrared laser with a wavelength of 118.8 μm and an 8 GeV stored electron beam. Present MeV-photon flux is estimated to be 1.3×103 photons/s. On the other hand,the sub-MeV-photon source at KPSI-JAEA consists of a pulse Nd∶YAG laser with a wavelength of 1 064 nm and a 150 MeV electron beam accelerated by microtron. In the first trial of the photon production in this source,backscattered photon flux is estimated to be 20 photons/pulse. Both the Compton backscattered photon sources have possibilities to be used for new tools in various fields such as nuclear physics,materials science,and astronomy.

关键词： laser Compton backscattering polarized γ-ray polarized X-ray

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^(136)Ba的10^+同质异能态

高能物理与核物理 2002年第8期26卷 814-817页

作者：甘再国刘忠张玉虎潘强岩 M.Oshima t.hayakawa Y.toh t.Shizima Y.Hatsukawa t.Ishii M.Sugawara 中国科学院近代物理研究所兰州730000 日本原子力研究所东海分部日本茨城县3191195

利用 450MeV的82 Se束流轰击139La靶 ,通过核子转移反应产生了136 Ba ,用在束γ谱学方法测量了其激发态的γ衰变 ,观测到了它的 1 0 +态同质异能态并得到该同质异能态的寿命为 94ns.

关键词： ^136Ba 同质异能态能级寿命延迟符合超前符合钡^136

Rotational Bands in Odd-odd ^(180)Ir

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2000年第1期 131-131页

作者： ZhangYuhu t.hayakawa 等不详 JapanAtomicEnergyResearchInstitute Japan

^(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