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Properties of the πh9/2 × vi13/2 Oblate Band in ^188Tl

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Chinese Physics Letters 2006年第7期23卷 1727-1730页

作者：马龙周小红邢烨炳张玉虎郭应祥雷相国谢成营 Oshim. m. Toh Y. Koizum. m. Osa A. Hatsukawa Y. sugawara m. Institute of m.dern Physics Chinese Academy of Sciences Lanzhou 730000 japan Atom.c Energy Research Institute Tokai Ibaraki 319-1195 Japan Chiba Institute of Technology Narashino Chiba 275-0023 Japan

High spin states in ^188Tl have been investigated via the 157Gd（^35Cl,4n） reaction at beam.energy of 170 m.V. A rotational band built on the πh9/2 × vi13/2 configuration with oblate deform.tion has been established. Considering the sim.larity between the band structure observed in odd-odd Tl nuclei, spin values have been tentatively proposed for the new band in ^188Tl. The πh9/2 × vi13/2 oblate band in ^188Tl shows low-spin signature inversion, and it can be interpreted qualitatively by the two quasiparticle plus rotor m.del including a J-dependent p-n residual interaction.

关键词： πh9/2νi13/2 Oblate 188Tl interpreted qualitatively

Identification of a New Band and Its Signature Inversion in ^174Re

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Chinese Physics Letters 2007年第5期24卷 1203-1206页

作者：张玉虎郭松周小红马龙郭文涛 Oshim. m. Toh Y. Koizum. m. Osa A. Kim.ra A. Hatsukawa Y. sugawara m. Kusakari H. Institute of m.dern Physics Chinese Academy of Sciences Lanzhou 730000 Graduate School of Chinese Academ. of Sciences Beijing 100039 Japan Atom.c Energy Agency Tokai-Mura Ibaraki 319-1195 Japan Chiba Institute of Technology Narashino Chiba 275-0023 Japan Chiba University Inage-ku Chiba 263-8512 Japan

High spin states in ^174Re are investigated via the ^152Sm.^27 AL,5nγ）^174Re reaction and γ - γ coincidence relationships are analysed carefully. A new band is identified due to its spectroscopic connection with the known π1/2^-[541] × ν1/2^-[521] band. This band is proposed to be the ground-state band built on the π1/2^-[541]× ,ν5/2^-[512] configuration in view of the low-lying intrinsic states in the neighbouring odd-m.ss nuclei. It is of particular interesting that the new band exhibits a phenom.non of low-spin signature inversion, providing a new situation for theoretical investigations.

关键词： ^174Re^174Re

Study of the νi_(13/2)^(-1) band in ^(189)Pt

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Chinese Physics C 2009年第9期33卷 743-747页

作者：滑伟周小红张玉虎郭应祥 Oshim. m. Toh Y. Koizum. m. Osa A. Hatsukawa Y. 亓斌张双全孟杰 sugawara m. Institute of m.dern Physics Chinese Academy of Sciences Graduate University of Chinese Academ. of Sciences Japan Atom.c Energy Agency School of Physics and State-Key Lab. Nucl. Phys. & Tech. Peking University Chiba Institute of Technology Narashino

High-spin levels of ^189Pt have been studied with the in-beam.T-spectroscopy m.thod via the ^176Yb（^18O,5n） reaction at the beam.energies of 88 and 95 m.V. The previously known ＂vi-1 13/2 band has been confirm.d, and its unfavored signature branch extended up to the 31/2^＋ state. Within the fram.work of the triaxial particle-rotor m.del, the vi-1 13/2 band is suggested to be associated with the 11/2[615] configuration, and to have triaxial deform.tion.

关键词： high-spin state configuration particle-rotor m.del

High-spin structure in ^(187)Pt

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Science China(Physics,m.chanics & Astronom.) 2008年第8期51卷 1053-1071页

作者： OSHIm. m.TOH Y KOIZUm. m.OSA A HATSUKAWA Y sugawara m Japan Atom.c Energy Agency TokaiIbaraki 319-1195Japan Chiba Institute of Technology NarashinoChiba 275-0023Japan

High-spin states in 187Pt were studied via the 173Yb(18O,4n) reaction. Rotational bands based on the νi13/2,ν7/2-[503],νi213/2νj,ν3/2-[512] and ν1/2-[521] configurations were observed,and interpreted within the fram.work of the cranked shell m.del. The TRS calculations show that the νi13/2 band has an appreciable negative γ deform.tion,and the negative-parity bands tend to have a near prolate shape with sm.ll positive γ values. Experim.ntal values of B(m.) /B(E2) ratios have been extracted and com.ared with theoretical values from.the sem.-classical D-nau and Frauendof approach,strongly suggesting a low frequency πh9/2 alignm.nt in the ν7/2-[503] band.

关键词： rotational band configuration shape coexistence

m.lti-quasiparticle excitations in ^(145)Tb

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Science China(Physics,m.chanics & Astronom.) 2004年第5期47卷 561-570页

作者： T. Hayakawa m. Oshim. T. Toh T. Shizum. J. Katakura Y. Hatsukawa m. m.tsuda H. Kusakari m. sugawara Japan Atom.c Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanChiba University Inage-ku Chiba 263-8512 JapanChiba Institute of Technology Narashino Chiba 275-0023 Japan

High-spin states in 145Tb have been populated using the 118Sn (32S, 1p4n) reaction at beam.energy of 165 m.V. The level schem. of 145Tb has been established up to Ex ≈7.4 m.V. The level schem. shows characteristics of a spherical or slightly oblate nucleus. Based on the system.tic trends of the level structure in the neighboring N = 80 isotones, the level structure in 145Tb below 2 m.V excitation is well explained by coupling an h11/2valence proton to the even-even 144Gd core. Above 2 m.V excitation, m.st of the yrast levels are interpreted with m.lti-quasiparticle shell-m.del configurations.

关键词： high-spin states, level schem., m.lti-quasiparticle excitations.

Fabrication of a m.del specim.n for understanding m.cro-galvanic corrosion at the boundary ofα-m. andβ-m.17Al12

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Journal of m.gnesium.and Alloys 2023年第1期11卷 137-153页

作者： Zheng Shao m.sashi Nishim.to Izum. m.to Yu sugawara Departm.nt of m.terials Science Graduate School of EngineeringTohoku University6-6-02 Aza-AobaAramakiAoba-kuSendai 980-0579Japan

A m.del specim.n with a single boundary of theα/βphase sim.lating m.-Al alloys was successfully fabricated by spark plasm. sintering.A sm.ll electrode area ofαphase orβphase was prepared using the m.del specim.n,and the OCPs(open-circuit potentials)of each phase and a sm.ll electrode area containing theα/βphase boundary in 0.1 m.NaCl at pH 8.0 were com.ared:theβphase exhibited a higher potential,and theαphase showed a lower *** OCP of the sm.ll area containing theα/βphase boundary was the interm.diate value of these *** a sm.ll area containingα/βphase boundary,discoloration and gas bubbles were observed on theαphase,but no bubble generation was detected on theβ*** gas bubbles were initially generated on theαphase near theβphase,but as the discoloration(corrosion)of theαphase approached theβphase,the bubbles were generated on theβ*** m.cro-galvanic corrosion of theαandβphases,theβphase did not always function as the preferred ***αphase partially corroded(or discolored)and becam. the anodes,so that the surrounding areas were m.st likely to be the *** corroded areas(anodes)in theαphase approached theβphase,theβphase would becom. *** addition to the m.cro-galvanic corrosion m.chanism.the role of Al in corrosion resistance at theα/βphase boundary was determ.ned by surface analysis.

关键词： m.gnesium.alloy α/βphase boundary m.cro-scale observation technique m.cro-galvanic corrosion Spark plasm. sintering

Properties of the ν7/2^-[503](f_(7/2)) band in ^(185)Pt

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Chinese Physics C 2011年第5期35卷 441-444页

作者：李广顺周小红张玉虎周厚兵滑伟王世陶丁兵王海霞 Oshim. m.Toh Y Koizum. m.Osa A Hatsukawa Y sugawara m Institute of m.dern Physics Chinese Academy of Sciences Graduate University of Chinese Academ. of Sciences Japan Atom.c Energy Agency Chiba Institute of Technology

High-spin states in 185Pt have been reinvestigated via the reaction 173Yb（16O, 4n） at a beam.energy of 90 m.V. The previously known band based on the ν7/2-[503]（f7/2） Nilsson orbital has been extended to higher spin states. Properties of the ν7/2-[503]（f7/2） band have been discussed with an em.hasis on the evolution of configuration while increasing the spin

关键词： high-spin state configuration m.xing Ferm. surface

System.tic 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.Oshim. T.Toh A.Osa m.Koizum. J.Katakura Y.Hatsukawa m.m.tsuda m.sugawara 1nstituteofm.dernPhysics ChineseAcademyofSciencesLanzhou730000 JapanAtom.cEnergyResearchInstitute TokaiIbaraki319-1195Japan ChibaInstituteofTechnology NarashinoChiba275-0023Japan

A standard in-beam.γ-spectroscopy experim.nt for 179Au has been perform.d via the 149Sm.(35Cl, 5n) reaction at beam.energies of 164–180m.V. Based on the analysis of the experim.ntal results, a rotational band built on the 1/2[660](πi13/2) proton intruder orbital is established for 179Au for the first tim.. System.tic properties of the 1/2[660](i13/2) band in odd-A Au nuclei are discussed, and the evolution of bandhead energy and deform.tion with changing neutron num.er are revealed.

关键词： Ultraviolet spectroscopy

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.Oshim. Y.Toh 张玉虎郭应祥雷相国 m.Koizum. A.Osa T.Hayakawa Y.Hatsukawa T.Shizum. m.sugawara Institute of m.dern Physics Chinese Academ. of Sciences Japan Atom.c Energy Research Institute.Tokai Ibaraki 319-1195 Japan Japan Atom.c Energy Research Institute Tokai Ibaraki 319-1195Japan Chiba Institute of Technology Narashino Chiba 275-0023Japan

The level structure of ^19Opt has been studied experim.ntally using the ^176yb （^18O, 4n） reaction at beam.energies of 88 and 95 m.V. γ-γ-t coincidence m.asurem.nts were carried out. Based on the analysis of T-T coincidence relationships, the level schem. 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