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Shape Evolution in Rotating ^(178)Os

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Chinese Physics Letters 2011年第11期28卷 79-82页

作者： HAO Xin ZHU Li-Hua WU Xiao-Guang he chuang-ye ZheNG Yun LI Li-Hua SUN Hui-Bin LI Guang-Sheng College of Physics and Technology Shenzhen UniversityShenzhen 518060 School of Physics and Nuclear Energy Engineering Beihang UniversityBeijing 100191 China Institute of Atomic Energy Beijing 102413

In order to investigate the evolution of X(5)in rotating ^(178)Os,an experiment populating ^(178)Os via the fusion evaporation reaction 154Sm(^(29)Si,5n)^(178)Os was performed at the HI-13 tandem accelerator at the China Institute of Atomic Energy(CIAE).Lifetimes of excited states above 8^(+)in the yrast band in 178Os have been measured using the Doppler shift attenuation *** above 12^(+)states were measured for the first *** deduced transitional quadruple moments(Qt),together with the previous data using the recoil distance Doppler shift(RDDS)method are compared with theoretical calculations based on the X(5)model and the interaction Boson model(IBM).Above the 10^(+)states,the Qt values fit well with the X(5)*** present result suggests that the shape of a nucleus ^(178)Os keeps X(5)critical point symmetry as spin increases to at least 14^(+).The shape change of 178Os with spin increasing is similar to that of ^(176)Os.

关键词： method states

Near-Yrast Structures in Odd-Odd 122I Nucleus

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Chinese Physics Letters 2012年第9期29卷 40-44页

作者： LIU Gong-ye LI Li LI Xian-Feng YU De-Yang SUN Ji LI Cong-Bo MA Ying-Jun WU Xiao-Guang he chuang-ye ZheNG Yun ZHU Li-Hua ZHAO Yan-Xin College of Physics Jilin UniversityChangchun 130012 China Institute of Atomic Energy Beijing 102413 School of Physics and Nuclear Energy Engineering Beihang UniversityBeijing 100191 Department of Physics Heilongjiang UniversityHaerbin 150080

Excited states of the odd-odd nucleus 122I are investigated via the fusion-evaporation reaction 116Cd(11B,5n)at a beam energy of 68 *** two most strongly populated bands in 122I are observed up to excitation energies around 10.5 *** possible configurations at lower spins are assigned toπh_(11/2)■νh_(11/2) andπh_(11/2)■νd_(5/2) based on the observed population,B(M1)/B(E2)values,alignments and signature splitting.E1 transitions are observed connecting theπh_(11/2)■νd_(5/2) band to theπh_(11/2)■νh_(11/2) band,which may be evidence of octupole *** terminations caused by the full alignment of the valence nucleons outside the 114Sn core are observed in both bands.

关键词： bands alignment connecting

High Spin States of ^(113)In

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Chinese Physics Letters 2012年第6期29卷 94-97页

作者： MA Ke-Yan LU Jing-Bin YANG Dong LI Jian WANG Hui-Dong LIU Yun-Zuo WU Xiao-Guang ZHU Li-Hua ZheNG Yun he chuang-ye College of Physics Jilin UniversityChangchun 130023 China Institute of Atomic Energy Beijing 102413

Level structures of 113 In are studied through the fusion-evaporation reaction 110 Pd(7 Li,4n)113In at a beam energy of 50 Me *** new bands are established for the first *** the ΔI =2 band based on proton excitation is assigned to the πg-29/2 (0)υh211/2d5/2 *** addition,the backbending associated with the additional aligned h11/2 neutron pair is found in the negative parity yrast *** experimental results are compared with self-consistent tilted axis cranking relativistic mean field *** decay paths of theπ h11/2intruder band are established,by which the level energies and spins of the πh11/2 intruder band are *** bandcrossing delay of the πh11/2 intruder bands around the Z =50 shell and the dynamic moment of inertia of the πg-19/2 (0) υh^(2)_(11/2) bands in 113,115,117,119 In are studied systematically.

关键词： bands bending excitation

High-Spin States in the Odd-Odd Nucleus 92Nb

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Chinese Physics Letters 2014年第4期31卷 30-32页

作者： WU Yi-heng LU Jing-Bin LUO Peng-Wei LI Guang-Sheng LI Hong-Wei WU Xiao-Guang he chuang-ye ZheNG Yun MA Ke-Yan YANG Dong LI Cong-Bo HU Shi-Peng LIU Jia-Jian WANG Jin-Long YAO Shun-he CheN Qi-Ming ZHONG Jian College of Physics Jilin University Changchun 130012 China Institute of Atomic Energy Beijing 102413 College of Physics and Technology Shenzhen University Shenzhen 518060

High spin states of the odd-odd nucleus 92Nb are investigated using the S2Se （14N, 4n）92Nb reaction at a beam energy of 54MeV. The level scheme of the 92Nb was extended up to Jπ=（16＋） at about 7.3 MeV and Jπ=（21-） at about 9.7MeV. According to systematic analyses and a comparison with the neighboring nucleus, the higher spin states could be interpreted by the multi-particle excitations in the π（fs/2,P3/2,p1/2,gg/2）@v（p1/x,gg/2,d5/2, g7/2） configuration space.

关键词： HIGH spin physics CELL nuclei NIOBIUM -- Spectra MOLECULAR shapes SPIN excitations

Lifetime Measurement of the Low Lying Yrast States in^(189)Pt

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Chinese Physics Letters 2013年第11期30卷 65-67页

作者： he chuang-ye WU Xiao-Guang WANG Jin-Long WU Yi-heng ZheNG Yun LI Guang-Sheng LI Cong-Bo HU Shi-Peng LI Hong-Wei LIU Jia-Jian LUO Peng-Wei YAO Shun-he China Institute of Atomic Energy Beijing 102413

High-spin states in^(189)Pt are populated through the heavy-ion fusion-evaporation reaction^(176)Yb(18O,5n)^(189)Pt at 87 MeV beam *** array consisting of 13 HPGe detectors is used in conjunction with the plunger device in *** lifetimes of two levels in the yrast band are determined by using the recoil distance Doppler shift *** transition quadrupole moments Qt are *** results show that the 17+/2 state has a much larger Qt value than that of the ground state,whereas the value deceases quickly with spin *** may contribute to the shape driving effect of the quasi-neutron from the i_(13/2)orbital.

关键词： method energy

High-Spin Level Scheme of^(120)I

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Chinese Physics Letters 2013年第6期30卷 67-70页

作者： LI Li SUN Ji LI Jian YU De-Yang LIU Gong-ye ZHANG Wei-Tian MA Ke-Yan YANG Dong MA Ying-Jun WU Xiao-Guang ZHU Li-Hua he chuang-ye ZheNG Yun YAO Shun-he LI Cong-Bo HU Shi-Peng CAO Xue-Peng WANG Jin-Long YU Bei-Bei College of Physics Jilin UniversityChangchun 130012 China Institute of Atomic Energy Beijing 102413 School of Physics and Nuclear Energy Engineering Beihang UniversityBeijing 100191

Excited states in^(120)I are investigated utilizing in-beam gamma-ray spectroscopy following the^(114)Cd(^(11)B,5n)reaction at 70 MeV bombarding energy.A level scheme is constructed with states up to 9 *** levels are classified into several bands and their possible configurations at low spins are discussed *** on the linking transitions between different bands at higher spins,the excitation energy of the previously reported T1/2=53 min isomer is ascertained to be 72 *** showing the existence of an isomer at an excitation energy of 6.4 MeV is presented.

关键词： energy bands

Measured and Simulated Performance of a Four-Segmented Clover Detector

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Chinese Physics Letters 2012年第4期29卷 51-53页

作者： ZHANG Ning-Tao LEI Xiang-Guo ZHANG Yu-Hu ZHOU Xiao-Hong LIU Min-Liang GUO Ying-Xiang FANG Yong-De LI Shi-Cheng ZHOU Hou-Bing DING Bing WANG Hai-Xia WU Xiao-Guang he chuang-ye ZheNG Yun Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 Graduate School of Chinese Academy of Sciences Beijing 100049 China Institute of Atomic Energy Beijing 102413

Gamma rays with energies between 80keV and 1500keV produced by 133Ba and 152Eu standard sources are measured with the clover *** efficiencies and add-back factors are determined in both crystals and full clover *** add-back characteristics have been calculated using Monte-Carlo simulation code *** simulation and measurements agree very well.

关键词： detector keV Geant4

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^(112)In低位能级准粒子壳模型计算

原子能科学技术 2013年第3期47卷 321-325页

作者：李雪琴竺礼华吴晓光贺创业环境保护部核与辐射安全中心北京100082 中国原子能科学研究院核物理研究所北京102413 北京航空航天大学核科学与技术系北京100191

在近球形核112In的高自旋态研究中,发现112In在高位能级存在磁转动的运动模式,然而,在低位能级中出现了一些类似单粒子激发的特性,表现出很强的单粒子特性,磁转动带建立在这些单粒子组态的能级上。本文运用准粒子壳模型对低位能级进行... 详细信息

在近球形核112In的高自旋态研究中,发现112In在高位能级存在磁转动的运动模式,然而,在低位能级中出现了一些类似单粒子激发的特性,表现出很强的单粒子特性,磁转动带建立在这些单粒子组态的能级上。本文运用准粒子壳模型对低位能级进行了计算,并与实验值进行比较,指定了112In部分低位单粒子能级的组态。

关键词：高自旋态磁转动带准粒子壳模型组态

Experimental Study of Chiral Bands at A～110 Mass Region

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Experimental Study of Chiral Bands at A～110 Mass Region