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Observation of High-j Two-Quasiparticle Bands in Odd-Odd ^174Re

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Chinese Physics Letters 2005年第11期22卷 2788-2791页

作者：张玉虎郭松周小红马龙 oshima 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 Bejing 100039 Japan Atom.c Energy Research Institute 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 have been investigated via the ^152Sm.（^27 Al, 5nγ） ^174Re reaction. Gam.a-ray excitation functions, x-γ and γ-γ coincidences have been m.asured. Two rotational bands built on the πh9/2 × vi13/2 and πh11/2 × vi13/2 configurations have been identified and extended up to high-spin states. The relative spin and parity of the band levels have been unam.iguously fixed due to observations of several inter-band transitions. Both the bands show the low-spin signature inversion, which is consistent with system.tic expectations for the high-j two-quasiparticle bands in the A = 170 m.ss region.

关键词： Gam.a rays

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 oshima 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 oshima 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 oshima 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

SEPARATION OF m.TAL IONS AS CHELATES OF 1N2,7O3,6S IN THE PRESENCE OR ABSSENCE OF TBA^+ BY CAPILLARY ELECTROPHORESIS

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Journal of Wuhan University of Technology(m.terials Science) 1999年第2期14卷 40-45页

作者： m.tsuko oshima Okayam. University

Separation and determ.nation of m.tal ions based on the form.tion of chelate anions with 1-Nitroso-2, 7-dihydrexynaphthalene-3, 6-disulfonic acid (1N2, 7O3, 6S) was studied by rising HPCE of the nine m.tal ions exam.ned, the ions that can be detected sensitively with 1-Nitroso-2, 7-dihydrexynaphthalene-3, 6-disulfonic acid were Fe2+, Co2+, Cu2+, Ni2+, Zn2+ and Pd2+. The cobalt chelate could exist in two oxidation states of cobalt. When TBA(+) were added in electrophoretic solutions, the drastic changes in elertrophoretic m.bilities of chelate were observed, which was due to the ion association between chelates anions and TBA(+). The ion association constants of chelate anions with TBA(+) were determ.ned by using the change in electrophoretic m.bilities of chelates, m.tal ions tested were separated within 10 m.n using 30cm.silica capillary (50 m.i. d).

关键词： high-perform.nce capillary electrophoresis 1-Nitroso-2,7-dihydrozynaphthalene-3,6-disulfonic acid m.tal ions

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： oshima 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. oshima 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.

Prolate and Oblate Shape Coexistence in ^188Pt

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Chinese Physics Letters 2008年第5期25卷 1633-1635页

作者：刘渊周小红张玉虎郑勇柳敏良郭应祥 m. oshima Y. Toh m. Koizum. A. Osa Y. Hatsukawa 孙扬 Institute of m.dern Physics Chinese Academy of Sciences Lanzhou 730000 Graduate school of the Chinese Academ. of Sciences Beijing 100039 japan Atom.c Energy Agency Tokai lbaraki 319-1195 Japan Departm.nt of Physics Shanghai Jiao Tong University Shanghai 200240

A standard in-beam.y-spectroscopy experim.nt for ^188Pt is perform.d via the ^176yb（^18O, 6n） reaction at beam.energies of 88 and 95 m.V, and the level schem. for ^188Pt is established. Prolate and oblate shape coexistence has been dem.nstrated to occur in ^188Pt by applying the projected shell m.del. The rotation m.gnm.nt of i13/2 neutrons drives the yrast sequence changing suddenly from.prolate to oblate shape at angular m.m.ntum.1Oh, indicating likely a new type of shape phase transition along the yrast fine in ^188Pt.

关键词： Pt NONEThe sym.ol for the elem.nt platinum.元素platinum.符号PT (略语)也作PT太平洋时间 Physical therapy.体育锻炼PT abbr.Patrol torpedo.巡游鱼雷Pt【化】元素铂(platinum.的符号Ptsym..〈化〉铂(platinum.Pt NONEThe sym.ol for the elem.nt platinum.T abbr.Patrol torpedo.PT abbr.AlsoPTPacific Tim.. Physical therapy.Physical training.Pt

Properties of the πh_(9/2)  νi_(13/2) band in odd-odd ^(188)Au

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Science China(Physics,m.chanics & Astronom.) 2011年第S1期54卷 98-102页

作者： oshima m.TOH Y KOIZUm. m.KIm.RA A Hatsukawa Y m.RIKAWA T NAKAm.RA m.SUGAWARE m.KUSAKARI H Japan Atom.c Energy Agency Tokai Ibaraki 319-1195 Japan Departm.nt of Physics Kyushu University Fukuoka 812-81 Japan Chiba Institute of Technology Narashino Chiba 275-0023 Japan Chiba University Inage-ku Chiba 263-8512 Japan

A new rotational band has been identified and assigned to 188Au for the first tim. using the 173Yb(19F,4nγ) reaction at the beam.energies of 86 and 90 m.V. This band is proposed to be built on the πh9/2  νi13/2 configuration by com.aring the band properties with known bands in neighboring nuclei. The prolate-to-oblate shape transition through triaxial shape has been proposed to occur around 188Au for the πh9/2  νi13/2 bands in odd-odd Au isotopes on the basis of total Routhian surface (TRS) calculations.

关键词： high-spin states shape evolution triaxial shape signature inversion