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high spin states in ^(71)Ga

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Chinese Physics C 2021年第8期45卷 64-70页

作者： Jian Zhong Li-Tao Deng Shi-Peng Hu Xiao-Guang Wu P.C.Srivastava A.Saxena Guang-Sheng Li Yun Zheng Cong-Bo Li Qi-Ming Chen Chuang-Ye He Wen-Kui Zhou Bao-Ji Zhu Qi-Wen Fang Hui Hua Jun-Jie Sun Hui-Bin Sun Lin Gan Hai-Ge Zhao Qi Luo Zheng-Xin Wu College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China China Institute of Atomic Energy Beijing 102413China Department of Physics Indian Institute of TechnologyRoorkee 247667India School of Physics State Key Laboratory of Nuclear Physics and TechnologyPeking UniversityBeijing 100871China

Excited states in the odd-A nucleus 71Ga have been studied via the ^(70)Zn(7Li,a2n)^(71)Ga fusion-evaporation reaction with incident beam energies of 30 and 35 *** level scheme is established up to spin I^(n)=(29/2^(+))and an excitation energy-6.6 MeV.A previously known sequence built on the 9/2^(+) state is extended as a novel rotational band originating from the v(8^(2)_(9/2)***,a negative-parity sequence Is also *** observed energy levels of Ga have been interpreted in the framework of the nuclear shell model(SM).

关键词： high spin states shell model calculations configuration

high-spin states in ^(141)Pm

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Plasma Science and Technology 2012年第6期14卷 496-498页

作者：朱胜江顾龙王建国肖志刚杨韵颐张明刘宇丁怀博竺礼华吴晓光贺创业李广生王烈林郑云张彪 Department of Physics Tsinghua University China Institute of Atomic Energy

The high-spin states of 141pro nucleus have been studied by using in-beam v-ray spectroscopy technology through the126Te（19F, 4n） reaction at a beam energy of 90 MeV. The previous level scheme has been extended with spin up to 49/2 h. Many new levels and transitions are identified. Five collective band structures are observed. Based on systematic comparison with the neighboring nuclei, two bands with strong AI = 1 M1 transitions inside the bands are proposed as the oblate bands with γ--60°, and three bands with large signature splitting have been suggested as the oblate-triaxial deformation with γ--90°. The characteristics for these bands have been discussed.

关键词： nuclear structure high spin states oblate band oblate-triaxial band

Lifetimes of Excited Levels in ^131Ce

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Chinese Physics Letters 2004年第3期21卷 461-463页

作者：李广生孟锐竺礼华张振龙王月王治民温书贤陆景彬赵广义李险峰文立军郑永男郑勇刘运祚袁观俊杨春祥 ChinaInstituteofAtomicEnergy Beijing102413 DepartmentofPhysics JilinUniversityChangchun130023 InstituteofModernPhysics ChineseAcademyofSciencesLanzhou730000

The fusion-evaporation reaction 116Sn (19F, p3n) 131Ce at projectile energy of 95 MeV is used to populate high spin states in 131Ce. The de-exciting γ-rays are detected in γ-γ coincidence measurement with Compton-suppressed BGO-HPGe detectors. Level lifetimes of 131Ce were determined by using the Doppler shift attenuation method. The experimental results indicate that collectivity of 131Ce is reduced relative to that of 130Ce and it follows that deformation decreases with increase of the neutron number on the basis of systematic comparison of transition quadrupole moments for the light cerium isotopes.

关键词： deformation coincidence measurement DSA METHOD Quadrupole moment cerium isotopes Gamma Rays mean life high spin states

New band structures in ^(107)Ag

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Chinese Physics C 2011年第11期35卷 1009-1012页

作者：张彪竺礼华孙慧斌贺创业吴晓光陆景彬马英君郝昕郑云于蓓蓓李广生姚顺和王烈林徐川王建国顾龙 China Institute of Atomic Energy School of Science Shenzhen University School of Physics and Nuclear Energy Engineering Beijing University of Aeronautics and Astronautics Department of Physics Jilin University School of Physics and MOE Key Laboratory of Heavy Ion Physics Peking University Department of Physics Tsinghua University

high spin states in 107Ag are studied via the 100Mo（11B,4n） 107Ag reaction at an incident beam energy of 60 MeV. Prompt γ-γ coincidence and DCO ratios are measured by the detector arrays in CIAE. The level scheme has been updated and a new negative band belonging to 107 Ag is identified. The new negative side band has been constructed and its configuration is tentatively assigned to πg9/2νh11/2（g7/2/d5/2）.

关键词： high spin states level scheme routhian alignment

Level structure of ^(159)Lu

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Chinese Physics C 2009年第S1期33卷 164-166页

作者：盛海清翟健李险峰马英君赵延新王亚坤赵磊竺礼华吴晓光贺创业刘颖郝昕李雪琴 Department of Physics Jilin University China Institute of Atomic Energy

The high-spin states of 159Lu were populated by fusion-evaporation reaction 144Sm (19F, 4n) with beam energy 106 MeV. A new level scheme was established, which consists of the yrast band with negative parity, the octupole vibration band based on the states and quasipartical band with positive parity. The high spin states of 159Lu were discussed by systemic characteristics.

关键词： high spin states level scheme octupole deformation

Search for chiral bands in A～110 neutron-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. Hamilton A. V. Ramayya J. K. Hwang J. O. Rasmussen 王建国车兴来丁怀博 S. Frauendorf V. Dimitrov 徐强顾龙杨韵颐 Department of Physics Tsinghua University Department of Physics Vanderbilt University Lawrence Berkeley National Laboratory Physics Department Notre Dame University

high spin states in A～110 neutron-rich 106Mo, 110Ru and 112Ru nuclei have been reinvestigated by measuring the prompt γ-rays from the spontaneous fission of 252Cf. Two similar sets of bands are observed to high spins in each of three nuclei. Through analyzing of characters of the band structures, the chiral doublet bands are suggested in 106Mo, 110Ru and 112Ru.

关键词： nuclear structure high spin states triaxiality chiral doublet bands

Observation of a new rotational 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. Hamilton A. V. Ramayya J. K. Hwang J. O. Rasmussen I. Y. Lee 丁怀博徐强顾龙杨韵颐 Department of Physics Tsinghua University Department of Physics Vanderbilt University Lawrence Berkeley National Laboratory

The high spin states in neutron-rich 104Nb have been investigated from study of prompt γ-rays in spontaneous fission of 252Cf with the Gammasphere detector array. A new rotational band has been identified for the fir... 详细信息

关键词： high spin states spontaneous fission neutron-rich nucleus semi-decoupled band

Quest for Chirality in ^(107)Ag

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Plasma Science and Technology 2012年第6期14卷 518-520页

作者：贺创业张彪竺礼华吴晓光孙慧斌郑云于蓓蓓王烈林李广生姚顺和徐川王建国顾龙 China Institute of Atomic Energy School of Science Shenzhen University School of Physics and Nuclear Energy Engineering Beijing University of Aeronautics and Astronautics Department of Physics Jilin University School of Physics and MOE key laboratory of Heavy Ion Physics Peking University Department of Physics Tsinghua University

high spin states in 107Ag have been studied via the 100Mo （11B, 4n） 107Ag reaction at a beam energy of 60 MeV on the HI-13 tandem accelerator at the China Institute of Atomic Energy. By analyzing the gamma-gamma coincidence and their DCO ratios, a new level scheme of 107Ag is presented. The structures for the newly constructed bands are briefly discussed and tentatively assigned to be chiral doublet bands.

关键词： high spin states level scheme chirality

FirstIdentificationofLevelSchemesinNeutron─richIsotopes141Xe，152Ceand160Sm

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Tsinghua Science and Technology 1996年第3期1卷 9-13页

作者：朱胜江王牧歌邓景康 HamiltonJH RamayyaAV BabuBRS MaWC RasmussenJ StoyerMA ChuSY LeeIY ColeJD AyaeinejadR JohnsonNR McGowanFK Department of Modern Applied Physics Tsinghua University Beijing 100084 Department of Physics Vanderbilt University Nashville TN 37235 U.S.A Department of Physics Mississippi State University MS 39762 U.S.A Lawrence Berkeley Laboratory Berkeley CA 94720 U.S.A Lawrence Berkeley Laboratory Berkeley CA 94720 U.S.A Oak Ridge National Laboratory Oak Ridge TN 37831 U.S.A Idaho National Engineering Laboratory Idaho Falls ID 83415 U.S.A Oak Ridge National Laboratory Oak Ridge TN 37831 U.S.A

Level schemes of the extremely neutron rich isotopes, 141 Xe, 152 Ce and 160 Sm are identified for the first time using γ γ, γ γ γ, X γ( and X X coincidence ex... 详细信息

Level schemes of the extremely neutron rich isotopes, 141 Xe, 152 Ce and 160 Sm are identified for the first time using γ γ, γ γ γ, X γ( and X X coincidence experiments through measuring prompt γ rays from spontaneous fission of 252 Cf. Two collective band structures are observed in 141 Xe that most probably belong to octupole deformation. The yrast bands up to 16 + in 152 Ce and 14 + in 160 Sm demonstrated well deformed character. Two side bands in 152 Ce are tentatively assigned as octupole vibrational rotational bands with K=1 - and 2 - respectively. The behavior of J 1 with h- ω in Ce and Sm isotope chains is also discussed.

关键词： nuclear structure level schemes high spin states 141 Xe, 152 Ce and 60 Sm