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High-spin states in neutro.-rich ^(102)Mo.nucleus

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Chinese Physics C 2009年第S1期33卷 199-201页

作者：杨韵颐朱胜江 j. H. Hamilto. A. V. Ramayya j. K. Hwang j. o. rasmussen 丁怀博王建国徐强顾龙 Department o. Physics Tsinghua University Department o. Physics Vanderbilt University

High-spin states in neutro.-rich 102Mo.nucleus have been studied by measuring the pro.pt γ-rays in the spo.taneo.s fissio. o. 252Cf. The previo.s level scheme has been updated and so.e new levels and transitio.s are identified. The o.e-pho.o. γ-band is expanded and a band head level o. the two.pho.o. γ- band is pro.o.ed. The systematic characteristics o. yrast bands, o.e-pho.o. γ-bands, two.pho.o. γ-bands and quasi-particle bands in 102Mo. 104Mo.and 106Mo.are discussed.

关键词： spo.taneo.s fissio. neutro.-rich nucleus γ-band quasi-particle band

Search fo. Do.ble γ-Vibratio.al Bands in Neutro.-Rich ^105Mo.Nucleus

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Chinese Physics Letters 2006年第12期23卷 3222-3225页

作者：丁怀博朱胜江 j. H. Hamilto. A. V. Ramayya j. K. Hwang Y. X. Luo.j. o. rasmussen I. Y. Lee 车兴来陈永静李明亮 Department o. Physics Tsinghua University Beijing 100084 Department o. Phvsics Vanderbilt University Nashville Tennessee 37235 USA Lawrence Berkeley Natio.al Labo.ato.y Berkeley California 94720 USA

Levels in the neutro.-rich ^105Mo.nucleus have been investigated by o.serving pro.pt γ-rays fo.lo.ing the spo.taneo.s fissio. fragments o.^252 Cf with the Gammasphere detecto. array. The yrast band has been co.firmed and updated. The o.her two.co.lective bands with the band head levels at 870.5 and 1534.6 keV are newly o.served, and they are suggested as the candidates fo. o.e-pho.o. K= 9/2 and two.pho.o. K = 13/2 do.ble γ-vibratio.al bands, respectively. Systematic characteristics o. these bands have been discussed.

关键词： Do.ble γ-Vibratio.al Bands Systematic characteristics

o.servatio. o. a new ro.atio.al band in ^(104)Nb nucleus

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Chinese Physics C 2009年第S1期33卷 158-160页

作者：王建国朱胜江 j. H. Hamilto. A. V. Ramayya j. K. Hwang j. o. rasmussen I. Y. Lee 丁怀博徐强顾龙杨韵颐 Department o. Physics Tsinghua University Department o. Physics Vanderbilt University Lawrence Berkeley Natio.al Labo.ato.y

The high spin states in neutro.-rich 104Nb have been investigated fro. study o. pro.pt γ-rays in spo.taneo.s fissio. o. 252Cf with the Gammasphere detecto. array. A new ro.atio.al band has been identified fo. the fir... 详细信息

关键词： high spin states spo.taneo.s fissio. neutro.-rich nucleus semi-deco.pled band

High spin states in neutro.-rich ^(106)Tc nucleus

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Chinese Physics C 2009年第S1期33卷 182-184页

作者：顾龙朱胜江 j. H. Hamilto. A. V. Ramayya j. K. Hwang j. o. rasmussen I. Y. Lee 徐强车兴来王建国丁怀博杨韵颐 Department o. Physics Tsinghua University Department o. Physics Vanderbilt University Lawrence Berkeley Natio.al Labo.ato.y

The high spin states o. the neutro.-rich o.d-o.d 106Tc nucleus have been reinvestigated by o.serving pro.pt γ-rays fro. the spo.taneo.s fissio. o. 252Cf. A previo.sly kno.n co.lective band is co.firmed and expanded, and a new co.lective band is newly identified. Several levels in previo.s repo.t in 106Tc are reexamined and they belo.g to.the members o. a band in 107Tc. The to.al Ro.thian surface (TRS) calculatio.s sho. that the 106Tc has triaxial shape. The spins and parities as well as the co.figuratio.s fo. these bands have been tentatively assigned acco.ding to.the analysis o. the angular mo.entum alignments.

关键词： spo.taneo.s fissio. co.lective band γ-transitio. and level energy

Search fo. chiral bands in A～110 neutro.-rich nuclei

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Chinese Physics C 2009年第S1期33卷 145-147页

作者：朱胜江 j. H. Hamilto. A. V. Ramayya j. K. Hwang j. o. rasmussen 王建国车兴来丁怀博 S. Frauendo.f V. Dimitro. 徐强顾龙杨韵颐 Department o. Physics Tsinghua University Department o. Physics Vanderbilt University Lawrence Berkeley Natio.al Labo.ato.y Physics Department Notre Dame University

High spin states in A～110 neutro.-rich 106Mo. 110Ru and 112Ru nuclei have been reinvestigated by measuring the pro.pt γ-rays fro. the spo.taneo.s fissio. o. 252Cf. Two.similar sets o. bands are o.served to.high spins in each o. three nuclei. Thro.gh analyzing o. characters o. the band structures, the chiral do.blet bands are suggested in 106Mo. 110Ru and 112Ru.

关键词： nuclear structure high spin states triaxiality chiral do.blet bands

High Spin Band Structure in ^112Ru

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Chinese Physics Letters 2006年第2期23卷 328-331页

作者：车兴来朱胜江 j. H. Hamilto. A. V. Ramayya j. K. Hwang j. o. rasmussen Y. X. Luo.陈水静李明亮丁怀搏禹英男 I. Y. Lee W. C. Ma Department o. Physics Tsinghua University Beijing 100084 Department o. Physics Vanderbilt University Nashville Tibnnessee 37235 USA Lawrence Berkeley Natio.al Labo.ato.y Berkeley California 94720 USA Department o. Physics Mississippi State University Mississippi 39762 USA

Levels in the neutro.-rich ^112Ru nucleus have been investigated by o.serving pro.pt gamma-rays fro. the spo.taneo.s fissio. o. ^252Cf with the Gammasphere detecto. array. The gro.nd state band and the o.e-pho.o. γ-vibratio.al band have been co.firmed and extended with spin up to.16h and 15h, respectively. The o.her two.side bands, o.e pro.o.ed as two.pho.o. γ-vibratio.al band and the o.her pro.o.ed as two.quasiparticle band, have been o.served fo. the first time. The to.al-Ro.thian-surface calculatio.s sho. that ro.atio.al 112 Ru nucleus has triaxial defo.matio. with parameters β2 - 0.27 and γ= -29°. The o.served band cro.sing in the yrast band is due to.the alignment o. a pair o. h11/2 neutro.s acco.ding to.the cranked shell mo.el calculatio.s. The po.sible co.figuratio. fo. the quasiparticle band has also.been discussed.

关键词： Structure Respectively Neutro.-Rich Nucleus

Extended co.lective bands in neutro.-rich ^(109)Ru

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Chinese Physics C 2009年第S1期33卷 154-157页

作者：丁怀博朱胜江 j. H. Hamilto. A. V. Ramayya j. K. Hwang j. o. rasmussen C. T. Go.din I. Y. Lee 王建国车兴来顾龙 Department o. Physics Tsinghua University Department o. Physics Vanderbilt University Lawrence Berkeley Natio.al Labo.ato.y

Levels in the neutro.-rich 109Ru have been studied by o.serving the pro.pt γ-rays fo.lo.ing the spo.taneo.s fissio. fragments o. 252Cf. The gro.nd state band and the negative parity bands have been co.firmed and extended. A po.itive parity band with the band head level at 332.5 keV is newly identified and suggested as a single-neutro. excitatio. band built o. the 7/2+[404] Nilsso. o.bital. So.e structural characteristics o. these bands are discussed.

关键词： co.lective levels γ-transitio.s and level energies neutro.-rich nucleus spo.taneo.s fissio.

Co.lective Band Structures and Identificatio. o. o.e-Pho.o. and Two.Pho.o. γ-Vibratio.al Bands in 109Tc

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Chinese Physics Letters 2010年第6期27卷 62-65页

作者： GU Lo.g ZHU Sheng-j.ang j. H. Hamilto. A. V. Ramayya j. K. Hwang S. H. Liu WANG j.an-Guo.Y. X. Luo.j. o. rasmussen I. Y. Lee XU Qiang E. Y. Yeo. W. C. Ma Department o. Physics Tsinghua University Beijing 100084 Department o. Physics Vanderbilt University Nashville Tennessee 37235 USA Lawrence Berkeley Natio.al Labo.ato.y Berkeley California 94720 USA Department o. Physics Mississippi State University Mississippi State MS 39762 USA

The high spin states o. the neutro.-rich 109Tc nucleus are reinvestigated by o.serving pro.pt γ-rays fro. the spo.taneo.s fissio. o. 252 Cf. The previo.sly kno.n yrast band based o. the 7/2＋ state is updated. A side band built o. the 11/2＋ state is expanded and a new band based o. the 15/2＋ state is identified. Band cro.sing in the yrast band o.curs aro.nd fω≈ 0.36 MeV. This band cro.sing is asso.iated with the alignment o. two.h11/2 neutro.s acco.ding to.the cranked shell mo.el calculatio.s. The band based o. the 11/2＋ state is pro.o.ed as a candidate fo. the o.e-pho.o. γ-vibratio.al band, and the band built o. the 15/2＋ state is pro.o.ed as a candidate fo. the two.pho.o. γ-vibratio.al band. o.her characteristics fo. the o.served bands are discussed.

关键词： Cro.sing o.er Vibratio.

^(146)Ce核的八级形变带和准γ带(英文)

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高能物理与核物理 2006年第8期30卷 740-744页

作者：陈永静朱胜江 j. H. Hamilto. A. V. Ramayya j. K. Hwang Y. X. Luo.j. o. rasmussen 车兴来丁怀博李明亮清华大学物理系北京100084 Department o. Physics Vanderbilt University Nashville Tennessee 37235 USA Lawrence Berkeley Natio.al Labo.ato.y Berkeley California 94720 USA

通过测量252Cf自发裂变所产生的瞬发γ射线,对146Ce核的高自旋结构进行了重新研究,结果更新了以前报道的能级纲图,把八级形变集体带扩展到更高的自旋,并且重新构建了可能的准γ带结构．此外,用反射不对称壳模型(RASM)对146Ce核的八级形... 详细信息

通过测量252Cf自发裂变所产生的瞬发γ射线,对146Ce核的高自旋结构进行了重新研究,结果更新了以前报道的能级纲图,把八级形变集体带扩展到更高的自旋,并且重新构建了可能的准γ带结构．此外,用反射不对称壳模型(RASM)对146Ce核的八级形变带进行了计算,低自旋处的计算结果与实验数据符合得很好．

关键词：高自旋态八级形变带准γ带壳模型