USTC

          Research

© Molecular frame (e, 2e) of H2

               --Young-type interference for oriented molecule

     Particle - wave duality of matter particles plays key role in quantum mechanics

          Molecular double-slit interference

       Coherent superposition of electrons emitted from two atoms in diatomic molecules

        can be regarded as a  molecular double-slit

         Fully differential cross sections were measured in which the molecular axis direction is obtained.

        A multicenter distorted-wave calculation well agrees with experiment while a standard two-wave

        interference model fails.

RESEARCH INTERESTS

1) Electron impact spectroscopy: electron impact excitation and ionization,  time-resolved (e, 2e) electron momentum spectroscopy, molecular orbital imaging, molecular fragmentation dynamics.

    2) Scanning probe spectroscopy on surface.

CURRENT RESEARCH PROJECTS

1) National Natural Science Foundation (key project, Grant No. 11534011)

2) National Natural Science Foundation (Grant No. 11327404)

3) National Basic Research Program of China (Grant No. 2010CB923301)

PEER REVIEWED PAPERS

2021

[1] Xi Zhao, Xu Shan*, Xiaolong Zhu, Lei Chen, Zhenjie Shen, Wentian Feng, Dalong Guo, Dongmei Zhao, Ruitian Zhang, Yong Gao, Zhongkui Huang, Shaofeng Zhang, Xinwen Ma*, Xiangjun Chen, Prompt and delayed dissociations of N2O2+ induced by highly charged ion collisions, Phys. Rev. A 103 (2021)012802.

[2] Maomao Gong, Xingyu Li, Song Bin Zhang, and Xiangjun Chen, Theoretical study of electron impact single ionization of Neon by multicenter three distorted-wave method at low projectile energy: An overall agreement with experiment, J. Phys. B: At. Mol. Opt. Phys. 54 (2021) 015206.

2020

[1] Enliang Wang, Xueguang Ren*, Maomao Gong, Esam Ali, Zhenpeng Wang, Chao Ma, Don Madison, Xiangjun Chen, and Alexander Dorn, Triple-differential cross sections for (e,2e) electron-impact ionization dynamics of tetrahydrofuran at low projectile energy, Phys. Rev. A 102 (2020) 062813.

[2] Zhaohui Liu, ShanShan Niu, Xu Shan, Yaguo Tang, Chunkai Xu and Xiangjun Chen*, Electron Momentum Spectroscopy Study on the Valence Electronic Structure of Dimethyl Sulfide Considering Vibrational Effect, J. Phys. Chem. A 124 (2020) 8551-8561

[3] Enliang Wang, Esam Ali, Xingyu Li, Xueguang Ren, Xiangjun Chen, Don Madison, and Alexander Dorn, Molecular-frame (e, 2e) ionization dynamics of H2 at high impact-energy, Eur. Phys. J. D 74 (2020) 105.

[4] Enliang Wang, Xu Shan, Lei Chen, Thomas Pfeifer, Xueguang Ren, Xiangjun Chen, Alexander Dorn, Ultrafast Proton Transfer Dynamics on the Repulsive Potential of the  Ethanol  Dication:  Roaming-Mediated  Isomerization  Versus Coulomb Explosion, J. Phys. Chem. A 124 (2020) 2785-2791.

[5] Yu Zhang, Shanshan Niu, Yaguo Tang, Xu Shan, and Xiangjun Chen, Vibrational Effects on Electron Momentum Distributions of Outer-Valence Orbitals of Benzene, Chin. Phys. B. 29 (2020) 023402.

2019

[1] Lei Chen, Xu Shan, Enliang Wang, Xi Zhao, Weizhe Huang, and Xiangjun Chen*, Two-body fragmentation dynamics of C2H22+ by electron impact: disentangling vinylidene decarbonation from symmetric breakup, Phys. Rev A 100 (2019) 062707.

[2] Enliang Wang, Xu Shan*, Zhenjie Shen, Maomao Gong, Yaguo Tang, and Xiangjun Chen, Fragmentation dynamics of nitrogen trifluoride induced by electron collision, J. Chem. Phys., 151 (2019) 134308.

[3] Hongyan Zhou*, Xiheng Shi, Weimin Yuan, Lei Hao, Xiangjun Chen, Jian Ge, Tuo Ji, Peng Jiang, Ge Li, Bifang Liu, Guilin Liu, Wenjuan Liu, Honglin Lu, Xiang Pan, Juntai Shen, Xinwen Shu, Luming Sun, Qiguo Tian, Huiyuan Wang, Tinggui Wang, Shengmiao Wu, Chenwei Yang, Shaohua Zhang & Zhihao Zhong, Fast Adjacent Inflows as the Fuel of Supermassive Black Hole Accretion Disks in Quasars, Nature 573 (2019) 83-86.

[4] Yichun Wang, Shanshan Niu, Yaguo Tang, Yu Zhang, Xu Shan, Chunkai Xu*, and Xiangjun Chen, Electron momentum spectroscopy investigation on the electronic structure of iso-dichloroethylene valence shell, Chin. J. Chem. Phys., 32 (2019) 423 - 430.

[5] HU RenXiang, SHAN Xu*, YUAN GuangYuan, WANG ShuWen, ZHANG WeiHang, QI Wei, CAO Zhe, LI YiRen, CHEN ManMing, YANG XiaoPing, WANG Bo, HAO XinJun, FENG ChangQing, SU ZhenPeng, SHEN ChengLong, LI Xin, PAN ZongHao, LIU Kai, XU ChunKai, LIU ShuBin, AN Qi, ZHANG TieLong, WANG YuMing* and CHEN XiangJun, A low-energy ion spectrometer with half-space entrance for three-axis stabilized spacecraft, Sci China Tech Sci 62 (2019) 1015-1027.

[6] J. W. Xu, X. L. Zhu*,W. T. Feng, D. M. Zhao, Weizhe Huang, D. L. Guo, Y. Gao, S. F. Zhang, Xu Shan, Xiangjun Chen, X. Ma*, State-selective single-electron capture in 30 keV N3+-He collisions, X-RAY Spectrometry (2019) 1-5.

[7] Yichun Wang, Yaguo Tang, Shanshan Niu, Zhaohui Liu, Xu Shan, Chunkai Xu*, and Xiangjun Chen, Experimental and theoretical investigations on the valence orbitals of fluorobenzene by electron momentum spectroscopy, J. Phys. B 52 (2019) 095102.

[8] Shanshan Niu, Yaguo Tang*, Zhaohui Liu, Yufeng Shi, Enliang Wang, Xu Shan*, and Xiangjun Chen, An electron momentum spectroscopy study on valence electronic structure of methyl iodide: relativistic effect and electron correlation, Phys. Rev A 99 (2019) 022512.

[9] Lei Chen, Xu Shan*, Xi Zhao, Xiaolong Zhu, Xiaoqing Hu, Yong Wu*, Wentian Feng, Dalong Guo, Ruitian Zhang, Yong Gao, Zhongkui Huang, Jiangguo Wang, Xinwen Ma*, Xiangjun Chen, Two-body fragmentation dynamics of N2Oq+ (q = 2, 3) induced by electron capture collision of 5.7 keV/u Xe15+, Phys. Rev. A 99 (2019) 012710.

[10] ZheAn Li, Yaguo Tang,* Zhaohui Liu, Shanshan Niu, Xu Shan and Xiangjun Chen*, Electron Momentum Spectroscopy Study on Outer-Valence Orbitals of Pyrrole, Chem. Phys. 517 (2019) 54-59.

2018

[1] Enliang Wang*, Maomao Gong, Zhenjie Shen, Xu Shan, Xueguang Ren, Alexander Dorn, and Xiangjun Chen*, Fragmentation dynamics of CS2 in collisions with 1 keV electrons, J. Chem. Phys. 149 (2018) 204301.

https://doi.org/10.1063/1.5059347

[2] Hongjiang Yang*, Maomao Gong, Wenxiu Dong, Zhenjie Shen, Enliang Wang, and Xiangjun Chen, Two-body Fragmentation of OCS3+: an Ab Initio Molecular Dynamics Simulation Study, J. Phys. B: At. Mol. Opt. Phys. 51 (2018) 245201.

https://doi.org/10.1088/1361-6455/aaecfe

[3] Maomao Gong, Xingyu Li, Song Bin Zhang, Shanshan Niu, Xueguang Ren, Enliang Wang, Alexander Dorn, and Xiangjun Chen*, A Multicenter Three Distorted-wave Approach to Three-Dimensional Images for Electron-Impact Ionization Dynamics of Molecules: An Overall Agreement with Experiment, Phys. Rev. A 98 (2018) 042710.

[4] Khokon Hossen, Xueguang Ren, Enliang Wang, Maomao Gong, Xingyu Li, Song Bin Zhang, Xiangjun Chen*, and Alexander Dorn*, Triple-differential cross sections for single ionization of CO2 by 100 eV electron impact, J. Phys. B: At. Mol. Opt. Phys. 51 (2018) 215201.

[5] Shanshan Niu, Yaguo Tang, Zhaohui Liu, Xu Shan*, and Xiangjun Chen, Experimental and Theoretical Study of the Valence Electronic Structure of Propane by Electron Momentum Spectroscopy, J. Electron Spectrosc. Relat. Phenom., 229 (2018) 52-60.

[6] Xiaojie Xu, Maomao Gong*, Xingyu Li, Song Bin Zhang, and Xiangjun Chen*, Theoretical study of (e, 2e) triple differential cross sections of tetrahydrofuran using multicenter distorted-wave method, J. Chem. Phys. 148 (2018) 244104.

[7] HongJiang Yang, Enliang Wang*, WenXiu Dong, MaoMao Gong, Zhenjie Shen, Yaguo Tang, Xu Shan, Xiangjun Chen*, Ultrafast fragmentation dynamics of triply charged carbon dioxide: Vibrational-mode-dependent molecular bond breakage, Phys. Rev. A 97 (2018) 052703.

[8] ZheAn Li, ChunKai Xu*, Meng Li, WenJie Liu, and XiangJun Chen*, Nonlinear electron inelastic scattering from Au nano-structures induced by surface plasmon resonance, Sci. Rep. 8 (2018) 5626.

[9] Zhenjie Shen, Enliang Wang, Maomao Gong, Xu Shan, and Xiangjun Chen*, Electron-impact ionization cross sections for nitrogen molecule from 250 to 8000 eV, J. Electron Spectrosc. Relat. Phenom., 225 (2018) 42–48.

[10] Maomao Gong*, Xingyu Li, Song Bin Zhang, and Xiangjun Chen*, Theoretical study of electron impact triple differential cross sections of N2O by a multicenter distorted-wave method, J. Phys. B: At. Mol. Opt. Phys. 51 (2018) 094003.

[11] Wei Huang, Zhean Li, Chunkai Xu*, Jian Liu, ChunYe Xu, Xiangjun Chen, Microelectrode-shielding tip for scanning probe electron energy spectroscopy, Rev. Sci. Instrum. 89 (2018) 046102.

[12] YaGuo Tang, Xu Shan, ZhaoHui Liu, ShanShan Niu, and XiangJun Chen*, Development of an Electron Momentum Spectrometer for Time-resolved Experiments using Nanosecond Pulsed Electron Beam, Rev. Sci. Instrum.89 (2018) 033101.

[13] Xingyu Li, Xueguang Ren*, Khokon Hossen, Enliang Wang, Xiangjun Chen*, Alexander Dorn, Two-center interference in electron impact ionization of molecular hydrogen, Phys. Rev. A 97 (2018) 022706.

2017

[1] Maomao Gong*, Xingyu Li, Songbin Zhang, Lin Liu, Yong Wu, Jianguo Wang, Yizhi Qu, and Xiangjun Chen*, Theoretical study of (e,2e) processes for valence orbitals of CH₄ using a multicenter distorted-wave method, Phys. Rev. A 96 (2017) 042703. https://doi.org/10.1103/PhysRevA.96.042703

[2] Xingyu Li*, Maomao Gong, Lin Liu, Yong Wu, Jianguo Wang, Yizhi Qu, and Xiangjun Chen*, Calculation for (e, 2e) triple differential cross section of formic acid: an application of multicenter distorted wave method, Phys. Rev. A 95 (2017) 012703.  https://doi.org/10.1103/PhysRevA.95.012703

[3] Yaguo Tang, Xu Shan, Shanshan Niu, Zhaohui Liu, Enliang Wang, Noboru Watanabe, Masakazu Yamazaki, Masahiko Takahashi, and Xiangjun Chen*, Electron Momentum Spectroscopy Investigation on Molecular Conformations of Ethanol Considering Vibrational Effects, J. Phys. Chem. A 121 (2017) 277-287. http://dx.doi.org/10.1021/acs.jpca.6b10009

2016

[1] Meng Li, Xu Shan*, Shanshan Niu, Yaguo Tang, Fang Wu, Chunkai Xu, Xiangjun Chen, High resolution electron momentum spectroscopy study on ethanol: investigating orbital electron momentum distributions for individual conformer, Chin. J. Chem. Phys, 29 (2016) 645. http://dx.doi.org/10.1063/1674-0068/29/cjcp1604080

[2] Enliang Wang, Xu Shan, Qiguo Tian, Jing Yang, Maomao Gong, Yaguo Tang, Shanshan Niu, Xiangjun Chen*, Imaging molecular geometry with electron momentum spectroscopy, Sci. Rep. 6 (2016) 39351. http://rdcu.be/n30K

[3] Zhenjie Shen, Enliang Wang, Xu Shan, Xingyu Li, Maomao Gong, Yaguo Tang, and Xiangjun Chen*, Fragmentation dynamics of carbonyl sulfide in collision with 500 eV electron, J. Chem. Phys. 145 (2016) 234303. http://doi.org/10.1063/1.4972064

[4] Yaguo Tang, Xu Shan, Jing Yang, Shanshan Niu, Zhe Zhang, Noboru Watanabe, Masakazu Yamazaki, Masahiko Takahashi, and Xiangjun Chen*, Vibrational Effects on Electron Momentum Distributions of Outer-Valence Orbitals of Oxetane, J. Phys. Chem. A 120 (2016) 6855. http://dx.doi.org/10.1021/acs.jpca.6b06706

[5] Meng Li, Chunkai Xu*, Panke Zhang, Zhean Li and Xiangjun Chen*, Note: Electron energy spectroscopic mapping of surface with scanning tunneling microscope, Rev. Sci. Instrum. 87 (2016) 086108. http://dx.doi.org/10.1063/1.4960716 

2015

 [1] Enliang Wang, Xu Shan, Zhenjie Shen, Xingyu Li, Maomao Gong, Yaguo Tang, and Xiangjun Chen*, Three-body fragmentation dynamics of CO24+ investigated by electron collision at impact energy of 500eV, Phys. Rev. A 92 (2015) 062713.

 [2] Minfu Zhao, Xu Shan*, Jing Yang, Enliang Wang, Shanshan Niu and Xiangjun Chen, Observation of interference effects in (e, 2e) electron momentum spectroscopy of SF6, Chin. J. Chem. Phys. 28 (2015) 539-544.

 [3] EnLiang Wang, YaGuo Tang, ZhenJie Shen, HongJiang Yang, Xu Shan, and XiangJun Chen*, A high-efficiency multi-coincidence method for molecular fragmentation studies, Rev. Sci. Instrum. 86, 066108 (2015).

 [4]  EnLiang Wang, ZhenJie Shen, Xu Shan, MaoMao Gong, YaGuo Tang, Kai-Chung Lau, and XiangJun Chen*, Pathways for non-sequential and sequential fragmentation of CO₂³⁺ investigated by electron collision, Phys. Rev. A 91 (2015) 052711. http://dx.doi.org/10.1103/PhysRevA.91.052711

 [5] Xiangjun Chen*, Jing Yang, Xu Shan, Zhe Zhang, Qiguo Tian, and Enliang Wang, Observing interference effect in binary (e, 2e) of molecules, J. Phys.: Conf. Ser. 601 (2015) 012002.

 [6] Yufeng Shi, Xu Shan*, Enliang Wang, Hongjiang Yang, Wei Zhang, and Xiangjun Chen, Electron Momentum Spectroscopy Investigation into the outer valence orbitals of 2-fluoroethanol, Chin. J. Chem. Phys. 28 (2015) 35-42.

2014

 [1] Jing Yang, Xu Shan, Zhe Zhang, Yaguo Tang, Minfu Zhao and Xiangjun Chen*, Ring-puckering effects on the electron momentum distributions of valence orbitals of oxetane, J. Phys. Chem. A 118(2014) 11780-11786. 

 [2] ChunKai Xu, WenJie Liu, PanKe Zhang, Meng Li, Hanjun Zhang, KeZun Xu, Yi Luo* and XiangJun Chen*, Nonlinear Inelastic Electron Scattering Revealed by Plasmon-Enhanced Electron Energy Loss Spectroscopy, Nature Physics 10 (2014) 753-757.  http://dx.doi.org/10.1038/nphys3051 .

  [3] Zhe Zhang, Xu Shan*, Tian Wang, Enliang Wang and Xiangjun Chen*, Observation of Interference Effect in Vibrationally Resolved Electron Momentum Spectroscopy of H₂, Phys. Rev. Lett. 112, 023204 (2014). http://link.aps.org/doi/10.1103/PhysRevLett.112.023204

  [4]  Enliang Wang*, Yufeng Shi, Xu Shan*, Hongjiang Yang, Wei Zhang, Xiangjun Chen, Electron momentum spectroscopy of valence orbitals of n-propyl iodide: spin-orbit coupling effect and intramolecular orbital interactions, Chin. J. Chem. Phys. 27 (2014) 14073. (cover paper)

  [5] EnLiang Wang*, ZhenJie Shen, HongJiang Yang, YaGuo Tang, Xu Shan and XiangJun Chen, Dissociative ionization cross sections of CO₂ by impact of 5 keV electrons, Chin. Phys. B. 23 (2014) 113404 (Suggested by editors). http://cpb.iphy.ac.cn/EN/10.1088/1674-1056/23/11/113404

  [6] Yufeng Shi, Xu Shan*, Enliang Wang, Hongjiang Yang, Wei Zhang, and Xiangjun Chen, Experimental and theoretical investigation on the outer valence electronic structure of cyclopropylamine by (e, 2e) electron momentum spectroscopy, J. Phys. Chem.  A 118 (2014) 4484-93. http://dx.doi.org/10.1021/jp503198r

  [7] Song bin Zhang*, Xing Yu Li, Jian Guo Wang, Yi Zhi Qu and XiangJun Chen*, Multicenter distorted wave method for fast electron impact single ionization of molecule, Phys. Rev. A 89 (2014) 052711. http://dx.doi.org/10.1103/PhysRevA.89.052711  

  [8] Yufeng Shi, Enliang Wang, Hongjiang Yang, Wei Zhang, Xu Shan, Xiangjun Chen, Electron momentum spectroscopy study on valence electronic structure of Cyclopropylamine, J. Phys.: Conf. Ser. 488 (2014) 052019.

  [9] XU Chun-Kai*, ZHANG Pan-Ke, LI Meng, CHEN Xiang-Jun, Double Toroidal Analyzer for Scanning Probe Electron Energy Spectrometer, Chin. Phys. B, 23 (2014) 073402 (Suggested by editors).  http://cpb.iphy.ac.cn/EN/10.1088/1674-1056/23/7/073402

  [10] Panke Zhang, Chunkai Xu, Yaguo Tang, and Xiangjun Chen*,Point-to-point focusing equation for double toroidal analyzer,  J. Electron Spectrosc. Relat. Phenom. 193 (2014) 39-42. http://dx.doi.org/10.1016/j.elspec.2014.02.010

2013

  [1] EnLiang Wang , Xu Shan , YuFeng Shi , YaGuo Tang, and XiangJun Chen *, Momentum imaging spectrometer for molecular fragmentation dynamics induced by pulsed electron beam, Rev. Sci. Instrum. 84, 123110 (2013). http://dx.doi.org/10.1063/1.4847156

  [2] Zhang Han-Jun, Shan Xu*, Xu Chun-Kai, Chen Xiang-Jun, Triple differential cross section for the ionization of Ar(3p) by low-energy electron impact in the coplanar asymmetric geometry, Acta Phys. Sin. 62, 183401 (2013).

2012

   [1] Xu Shan, Ya-Guo Tang, and Xiang-Jun Chen, Probing the orbital electron momentum distribution for pure gauche conformer in ethanethiol by electron momentum spectroscopy, J. Phys.: Conf. Ser. 388, 052065 (2012).

   [2] Qiguo Tian, Jing Yang, Yufeng Shi, Xu Shan, and Xiang-Jun Chen, Pre-retardation effects on the high-sensitivity angle and energy dispersive multichannel electron momentum spectrometer with 2π angle range J. Phys.: Conf. Ser. 388, 142030 (2012).

   [3] Zhe Zhang, Xu Shan, Enliang Wang, and Xiangjun Chen*, Ejected electron spectroscopy of autoionizing resonances of helium excited by fast electron impact, Phys. Rev. A 85, 062702 (2012).  http://link.aps.org/doi/10.1103/PhysRevA.85.062702

  [4] Noboru Watanabe, Xiangjun Chen, Masahiko Takahashi, Interference Effects on (e, 2e) Electron Momentum Profiles of CF₄, Phys. Rev. Lett. 108, 173201 (2012).

  [5] QiGuo Tian, Jin Yang, YuFeng Shi, Xu Shan, XiangJun Chen*, Outer- and inner-valence satellite states of carbon dioxide: Electron momentum spectroscopy compared with SAC-CI general-R calculations, J. Chem. Phys. 136, 094306 (2012).

2011

   [1] Song Bin Zhang, Jian Guo Wang, R.K. Janev, and XiangJun Chen, Electron–hydrogen atom impact 1s→2s and 1s→2p excitation with screened Coulomb interaction between the n=2 and n=3 excitation thresholds, Phys. Rev. A 83 (2011) 032724.

   [2] QiGuo Tian, KeDong Wang, Xu Shan, XiangJun Chen*, A high-sensitivity angle and energy dipersive multichannel electron momentum spectrometer with 2p angle range, Rev. Sci. Instrum. 82 (2011) 033110.

2010

    [1] Song Bin Zhang, Jian Guo Wang, R.K. Janev, and XiangJun Chen, Electron collision with the BH₂ radical using the R-matrix method,  Phys. Rev. A  82 (2010) 062711.

    [2] ChengWu Huang, Xu Shan, Zhe Zhang, Engliang Wang, Zhongjun Li, XiangJun Chen*, High resolution electron momentum spectroscopy of valence satellites of carbon disulphide, J. Chem. Phys. 133 (2010) 124303.

    [3] S. B. Zhang, J. G. Wang, R.K. Janev, Y. Z. Qu and X. J. Chen, Photodetachment of Hydrogen Negative Ions in Debye Plasmas, Phys. Rev. A 81 (2010) 065402.

    [4] Zhang Zhe, Kyle Obergfell, Xianming L. Han, Chen XiangJun*, Monte Carlo fitting algorithm and its application in electron momentum spectroscopy, Acta Phys.Sin. (in Chinese), in press.

    [5] S. B. Zhang*, Y. Y. Qi, Y. Z. Qu, X. J. Chen and J. G. Wang, Positron-impact excitation of hydrogen atoms in Debye plasmas, Chin. Phys. Lett. 27 (2010) 013401.

 2009 

   [1] Xu Shan, Chunkai Xu, Xiaofeng Yin, Lixia Zhou, Kezun Xu, XiangJun Chen , Electron Momentum Distributions for 4a₁ Orbitals of CF_xCl_4-x in Low Momentum Region: a Possible Evidence of Molecular Geometry Distortion, Chin. J. Chem. Phys. 22 (2009).

    [2] ChunKai Xu, XiangJun Chen*, Xia Zhou, Zheng Wei, WenJie Liu, JiWei Li, J. F. Williams, and KeZun Xu, Spatial Resolved Scanning Probe Electron Energy Spectroscopy for Ag Islands on Graphite Surface, Rev. Sci. Instrum. 80 (2009) 103705. http://dx.doi.org/10.1063/1.3242277

    [3] Kedong Wang, Liqing Chen, Xu Shan, Xingju Wu, Kezun Xu, Xiangjun Chen*, Experimental and theoretical investigations into the electronic structure of CF₂Br₂ by electron momentum spectroscopy, J. Electron Spectrosc. Relat. Phenom. 173 (2009) 96-102.http://dx.doi.org/10.1016/j.elspec.2009.05.013

    [4] KeDong Wang, Xu Shan, XiangJun Chen*, Electron propagator theory study of 2-Aminoethanol conformers, J. Mol. Struc. (TheoChem) 909 (2009) 91-95. http://dx.doi.org/10.1016/j.theochem.2009.05.030

    [5] Xiangjun Chen*, Fang Wu, Mi Yan, Shanxi Tian*, Xu Shan, Kedong Wang, Zhongjun Li, KeZun Xu, Hyperconjugative effect on electron wavefunction of Ethanol, Chem. Phys. Lett. 472, 1-3 (2009) 19-22.  http://dx.doi.org/10.1016/j.cplett.2009.02.064

    [6] Li Zhongjun, Xiangjun Chen*, Xu Shan, Kezun Xu, Electron Momentum Spectroscopy Study of Jahn-Teller Effect in Cyclopropane, J. Chem. Phys., 130 (2009) 054302. http://dx.doi.org/10.1063/1.3068619

    [7] Mi Yan, Xu Shan, Fang Wu, Kedong Wang, Zhongjun Li, KeZun Xu, Xiangjun Chen*, Electron momentum spectroscopy study on valence electronic structures of ethylamine, J. Phys. Chem. A 113 (2009) 507-512.

    [8] WenJie Liu, ChunKai Xu*, YongGang Li, ZeJun Ding, KeZun Xu, XiangJun Chen,  The simulation study of the emission features of the Auger electrons in the tip-sample region of the scanning probe electron energy spectrometer, Jpn. J. Appl. Phys., 48 (2009) 122301.

    [9] XiangJun Chen*, Xu Shan, ZhongJun Li, Fang Wu and K Z Xu, Recent progress on electron momentum spectroscopy in application to the investigations on intramolecular interactions, J. Phys. CS, 194 (2009) 012032.

  [10] Noboru Watanabe, XiangJun Chen and Masahiko Takahashi, Bond oscillations observed in (e, 2e) electron momentum profiles of CF₄, J. Phys. CS 194 (2009) 052024.

 2008

    [1] XX Xue, Mi Yan, Fang Wu, Xu Shan, Kezun Xu, XJ Chen*, An electron momentum spectroscopy study on the complete valence orbitals of ethanethiol, Chin. J. Chem. Phys. 21 (2008) 515.

    [2] X. Zhou, C.K. Xu, Z. Wei, W.J. Liu, J.W. Li, X.J. Chen*, J.F. Williams and K.Z. Xu, Angle and Energy Dispersive Multichannel Electron Energy Spectrometer for Surface Analysis, J. Electron Spectrosc. Relat. Phenom. 165 (2008) 15-19.

    [3] Wu Fang, Xiangjun Chen*, Xu Shan, Shanxi Tian, Zhongjun Li and KeZun Xu, Conformational Stability of 1-butene: An Electron momentum spectroscopy Investigation, J. Phys. Chem. A, 112, Iss.18 (2008) 4360－4366.

    [4] Zhongjun Li, Xiangjun Chen*, Xu Shan, Xinxia Xue, Tao Liu, Kezun Xu, Experimental Observation of Relativistic Effects on Electronic Wavefunction for Iodine Lone-pair Orbital of CF₃I, Chem. Phys. Lett. 457 (2008)45.

    [5] JF Williams, X Chen and P Wilkie, Miniature electrostatic electron energy analyzers and S-shaped deflector, Rev. Sci. Instrum. 79 (2008) 023104

 2007   

    [1] Xiangjun Chen, Wu Fang, Shan Xu, Xu Kezun, Determining Conformational Preference for Molecules by Electron Momentum Spectroscopy, J. Phys. CS 80 (2007) 012003

   [2] Xu Chun-Kai, Wei Zheng, Chen Xiang-Jun and Xu Ke-Zun, The non-destructive threshold of the graphite surface by Pt/Ir tip in the ultra-fast pulse mode, Chin.Phys. 16 (2007) 2315

 2006  

    [1] YANG Xue-feng, WU Fang, SHAN Xu, YAN Mi, WANG Ke-dong, XUE Xin-xia, CHEN Xiang-jun*, XU Ke-zun, Electron Momentum Spectroscopy of the highest occupied Molecular Orbitals of Chlorobromomethane, Front. Phys. China 1 (2006) 424.

    [2] Xu Shan, XiangJun Chen*, LiXia Zhou, ZhongJun Li, Tao Liu, XinXia Xue and KeZun Xu, High resolution electron momentum spectroscopy of dichlorodifluoromethane: unambiguous assignments of outer valence molecular orbitals, J. Chem. Phys.125 (2006) 154307.

    [3] Lixia Zhou, Xiangjun Chen^*, Xiaofeng Yin, Xuhuai Zhang, Chunkai Xu, Xu Shan and Kezun Xu, Electron momentum distributions for outer valence orbitals of trichlorofluoromethane, J. Electron.Spectro.153 (2006) 58-64.

    [4] Xu Shan, Xiangjun Chen*, Chunkai Xu, Lixia Zhou, Kezun Xu, Electron momentum spectroscopy of the inner valence 2a1 and 1b2 orbitals of dichlorodifluoromethane, Chem. Phys. Lett. 422 (2006) 246-250.

 2005

    [1] Xingju Wu, Xiangjun Chen^*, Liqing Chen, Fang Wu, Xuefeng Yang, Zhongjun Li, Shan Xu, Yanyou Zheng and Xu Ke-zun, An electron momentum spectroscopy study of the highest occupied molecular orbital of trifluorobromomethane, Chin. Phys. Lett. 22 (2005) 1649.

    [2] L Q Chen, X J Chen^*, X J Wu, X Shan and K Z Xu, Triple differential cross sections of Li⁺ (1s²) and K⁺ (3p⁶) for Electron-impact ionization, J. Phys. B 38 (2005) 1371-1379.

    [3] Chi X.X., Xu X.Q., Chen X.J., Yuan Z.S., Magnetic characteristics for aromaticity and multiple-fold aromaticity in all-metal dianionic clusters Ga-4(2-) and In-4(2-), CHINESE JOURNAL OF CHEMICAL PHYSICS 18 (2005) 941-946.

    [4] X.X. Chi, X.J. Chen, Z.S. Yuan, Theoretical study on the aromaticity of the bimetallic clusters X₂M₂ (X = Si, Ge, M = Al, Ga), J. Mol. Struct.(Theochem) 732 (2005) 149-153.

    [5] Shan Xu, Chen Liqing, Chen Xiangjun*, Yang Xuefeng, Li Zhongjun, Liu Tao, Zheng Yenyou, Xu Kezun, Electron momentum distributions for two outermost molecular orbitals of Bromochlorodifluoromethane, Chin. J. Chem. Phys.(Letter) 18 (2005) 295.

 2004

    [1] Wu Xing-ju, Chen Xiang-jun^*, Shan Xu, Chen Li-qing and Xu Ke-zun, Theoretical calculation of triple different cross sections of 3s orbital of argon in coplanar symmetric (e, 2e) reaction, Chin. Phys. 13 (11)1857-61, Nov. 2004

    [2] Chi XX, Li XH, Chen XJ, Yuang ZS, Ab initio studies on the aromaticity of bimetallic anionic clusters XGa3- (X = Si, Ge), J. Mol. Struc.(THEOCHEM) 677 (1-3) 21-27, MAY 31 2004

    [3] XU Chun-Kai^*, WEI Zheng, CHEN Xiang-Jun, XU Ke-Zun and HUANG Wen-Hao, Threshold of Non-Destructive Pulse for Pt tip of STM on Graphite Surface, Chin. Phys. Lett. 21(2004) 524, March 2004

    [4] Zheng Wei, Chun-Kai Xu, Xiang-Jun Chen, Ke-Zun Xu^*, Single Short Voltage Pulse induced Superstructure on the Graphite Surface, Appl. Surf. Sci. 228(2004) 158-163, April 2004

    [5] XuHuai Zhang, XiangJun Chen*, Chunkai Xu, ChangChun Jia, XiaoFeng Yin, Xu Shan, Zheng Wei, KeZun Xu, An electron momentum spectroscopy study of the outer valence orbitals of chlorodifluoromethane, Chem. Phys. 299(1), 2004, 17-24, 29 March, 2004

 2003

    [1] D. H. Yu^*, J. F. Williams, X. J. Chen, P. A. Hayes, K. Bartschat, and V. Zeman, Cascade effects in the excitation of np⁵ (n+1)p states of krypton and xenon atoms by polarized electrons, Phys. Rev. A 67 (2003) 032707

 2002

  [1] Xu ChunKai, Chen XiangJun^*, Jia ChangChun, Zhang XuHuai, Yin XiaoFeng, Shan Xu, Wei Zheng, Xu KeZun, An electron momentum spectroscopy study of the frontier orbitals of chlorodifluoromethane, Chinese Physics Letters 19 (2002) 1795

    [2] Y Khajuria^*, LQ Chen, XJ Chen and KZ Xu, (e, 2e) triple differential cross sections of helium and argon at 64.6 eV, Physical Review A64 (2002) 042706

 2001

    [1] Xiangjun Chen^*, Chunkai Xu, Changchun Jia, Y. Khajuria and kezun Xu, Experimental and calculated momentum densities for outer valence orbitals of chlorotrifluoromethane, J. Physics B34 (2001) 4845-4855

 2000

    [1] XJ Chen^*, CC Jia, CK Xu, G Ouyang, LL Peng, SX Tian, KZ Xu, An electron momentum spectroscopy study of the highest occupied molecular orbital of chlorotrifluoromethane, Chemical Physics Letters 319 (2000) 76-80

    [2] XJ Chen^*, G Ouyang, CC Jia, LL Peng, CK Xu, SX Tian, KZ Xu, Study of outer valence orbitals of carbon dioxide by (e,2e) spectroscopy, J. Electron Spectroscopy and Related Phenome.107 (2000) 273-282

 Before 2000

  [1] SX Tian^*, XJ Chen, CK Xu, KZ Xu, LF Yuan and JL Yang, A computational study of (e, 2e) electron momentum spectroscopy and Penning ionization electron spectroscopy for molecular nitrogen, J. of Electron Spectroscopy and Related Phenomena 105 (1999) 99-112

    [2] SX Tian, KZ Xu^*, MB Huang, XJ Chen, JL Yang, CC Jia, Theoretical study on infrared vibrational spectra of boric-acid in gas-phase using density functional methods, J. Molecular Structure (Theochem) 459 (1999) 223-227

    [3] SX Tian, CF Zhang, ZJ Zhang, XJ Chen, KZ Xu^*, How many uracil tautomers there are? Density functional studies of stability ordering of tautomers, Chemical Physics 242 (1999) 217-223

    [4] CC Jia, XJ Chen, SX Tian, G Oy, LL Peng, BX Yang, KZ Xu^*, LF Yuan, JL Yang, An investigation of propane using electron momentum spectroscopy, J.Physics.B32 (1999) 1515-1522

    [6] SX Tian, XJ Chen, CC Jia, CK Xu, BX Yang and KZ Xu, F Shuang and JL Yang, An investigation of electron momentum spectroscopy for ethane, J. Physics B31 (1998) 2055-2064

    [7] Xing Shilin, Shi Qicun, Chen Xiangjun, Xu Kezun, Yang Bingxin, Wu Shulan, Feng Renfei, Absolute   total-cross-section measurements for intermediate-energy electron scattering on C₂H₂ and CO, Physical Review A51 (1995) 414-417