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Ionization energy and thermochemistry of CF2Cl2 determined from threshold photoelectron spectroscopy. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138631] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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2
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Tang Y, Shan X, Liu Z, Niu S, Wang E, Chen X. Development of an electron momentum spectrometer for time-resolved experiments employing nanosecond pulsed electron beam. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:033101. [PMID: 29604728 DOI: 10.1063/1.5018665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The low count rate of (e, 2e) electron momentum spectroscopy (EMS) has long been a major limitation of its application to the investigation of molecular dynamics. Here we report a new EMS apparatus developed for time-resolved experiments in the nanosecond time scale, in which a double toroidal energy analyzer is utilized to improve the sensitivity of the spectrometer and a nanosecond pulsed electron gun with a repetition rate of 10 kHz is used to obtain an average beam current up to nA. Meanwhile, a picosecond ultraviolet laser with a repetition rate of 5 kHz is introduced to pump the sample target. The time zero is determined by photoionizing the target using a pump laser and monitoring the change of the electron beam current with time delay between the laser pulse and electron pulse, which is influenced by the plasma induced by the photoionization. The performance of the spectrometer is demonstrated by the EMS measurement on argon using a pulsed electron beam, illustrating the potential abilities of the apparatus for investigating the molecular dynamics in excited states when employing the pump-probe scheme.
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Affiliation(s)
- Yaguo Tang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xu Shan
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Zhaohui Liu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shanshan Niu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Enliang Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiangjun Chen
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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3
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Li M, Shan X, Niu SS, Tang YG, Wu F, Xu CK, Chen XJ. High Resolution Electron Momentum Spectroscopy Study on Ethanol: Orbital Electron Momentum Distributions for Individual Conformers. CHINESE J CHEM PHYS 2016. [DOI: 10.1063/1674-0068/29/cjcp1604080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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4
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Shi YF, Shan X, Wang EL, Yang HJ, Zhang W, Chen XJ. Electron Momentum Spectroscopy of Outer Valence Orbitals of 2-Fluoroethanol. CHINESE J CHEM PHYS 2015. [DOI: 10.1063/1674-0068/28/cjcp1410175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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5
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Yang J, Shan X, Zhang Z, Tang Y, Zhao M, Chen X. Ring-puckering effects on electron momentum distributions of valence orbitals of oxetane. J Phys Chem A 2014; 118:11780-6. [PMID: 25423196 DOI: 10.1021/jp509526a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The binding energy spectra and electron momentum distributions for the outer-valence molecular orbitals of oxetane have been measured utilizing (e, 2e) electron momentum spectrometer with non-coplanar asymmetric geometry at the impact energy of 2500 eV. The experimental momentum distributions were compared with the density functional theory calculations employing B3LYP hybrid functional with aug-cc-pVTZ basis set. It was found that the calculation at planar geometry (C2v) completely fails to interpret the large "turn-up" at low momentum region in electron momentum distribution of the highest occupied molecular orbital (HOMO) 3b1, while the calculations considering the thermal abundances of planar (C2v) and bent (Cs) conformers or the thermally populated vibrational states of ring-puckering motion have significantly improved the agreement. The results indicate that the ring-puckering motion of oxetane has a strong effect on the electron density distribution of HOMO.
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Affiliation(s)
- Jing Yang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China , 96 Jinzhai Road, Hefei, Anhui 230026, China
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Wang EL, Shi YF, Shan X, Yang HJ, Zhang W, Chen XJ. Electron Momentum Spectroscopy of Valence Orbitals of n-Propyl Iodide: Spin-Orbit Coupling Effect and Intramolecular Orbital Interaction. CHINESE J CHEM PHYS 2014. [DOI: 10.1063/1674-0068/27/05/503-511] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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7
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Shi Y, Shan X, Wang E, Yang H, Zhang W, Chen X. Experimental and Theoretical Investigation on the Outer Valence Electronic Structure of Cyclopropylamine by (e, 2e) Electron Momentum Spectroscopy. J Phys Chem A 2014; 118:4484-93. [DOI: 10.1021/jp503198r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yufeng Shi
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Modern Physics and Synergetic Innovation Center of Quantum Information
and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xu Shan
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Modern Physics and Synergetic Innovation Center of Quantum Information
and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Enliang Wang
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Modern Physics and Synergetic Innovation Center of Quantum Information
and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hongjiang Yang
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Modern Physics and Synergetic Innovation Center of Quantum Information
and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Wei Zhang
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Modern Physics and Synergetic Innovation Center of Quantum Information
and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiangjun Chen
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Modern Physics and Synergetic Innovation Center of Quantum Information
and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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8
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Zhang Z, Shan X, Wang T, Wang E, Chen X. Observation of the interference effect in vibrationally resolved electron momentum spectroscopy of H2. PHYSICAL REVIEW LETTERS 2014; 112:023204. [PMID: 24484009 DOI: 10.1103/physrevlett.112.023204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2012] [Indexed: 06/03/2023]
Abstract
We report the first measurement on vibrationally resolved electron momentum spectroscopy of H2 by using a high-resolution (e, 2e) spectrometer. The vibrational-specific experimental momentum profiles have been obtained and shown to be in agreement with calculations of (e, 2e) ionization cross sections taking into account the vibrational wave functions. Distinct deviations from Franck-Condon predictions have been observed in vibrational ratios of cross sections, which can readily be ascribed to the Young-type two-center interference. Unlike previous (e, 2e) work, the present observation of an interference effect does not rely on the comparison with the one-center atomic cross section.
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Affiliation(s)
- Zhe Zhang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
| | - Xu Shan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
| | - Tian Wang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
| | - Enliang Wang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
| | - Xiangjun Chen
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
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Tian Q, Yang J, Shi Y, Shan X, Chen X. Outer- and inner-valence satellites of carbon dioxide: Electron momentum spectroscopy compared with symmetry-adapted-cluster configuration interaction general-Rcalculations. J Chem Phys 2012; 136:094306. [DOI: 10.1063/1.3691103] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Tian Q, Wang K, Shan X, Chen X. A high-sensitivity angle and energy dipersive multichannel electron momentum spectrometer with 2π angle range. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2011; 82:033110. [PMID: 21456721 DOI: 10.1063/1.3568744] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A high-sensitivity angle and energy dispersive multichannel electron momentum spectrometer with simultaneous detection in 2π angle range is presented. A newly designed double half wedge and strip anode position-sensitive detector is employed to collect the ionized and scattered electrons passing through a 90° sector, 2π spherical electrostatic analyzer over azimuthal angle range of about 150° for each. Experimental results on argon are presented to exhibit the performance of the spectrometer.
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Affiliation(s)
- QiGuo Tian
- Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei 230026, China
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11
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Huang C, Shan X, Zhang Z, Wang E, Li Z, Chen X. High-resolution electron momentum spectroscopy of valence satellites of carbon disulfide. J Chem Phys 2010; 133:124303. [DOI: 10.1063/1.3481778] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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12
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Shan X, Xu CK, Yin XF, Zhou LX, Xu KZ, Chen XJ. Electron Momentum Distributions for 4a1 Orbitals of CFxCl4x in Low Momentum Region: a Possible Evidence of Molecular Geometry Distortion. CHINESE J CHEM PHYS 2009. [DOI: 10.1088/1674-0068/22/06/642-648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Ning C, Liu K, Luo Z, Zhang S, Deng J. Electron momentum spectroscopy study on valence electronic structures of pyrimidine. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.06.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Yan M, Shan X, Wu F, Xia X, Wang K, Xu K, Chen X. Electron Momentum Spectroscopy Study on Valence Electronic Structures of Ethylamine. J Phys Chem A 2008; 113:507-12. [DOI: 10.1021/jp808281w] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mi Yan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China
| | - Xu Shan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China
| | - Fang Wu
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China
| | - Xuexin Xia
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China
| | - Kedong Wang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China
| | - Kezun Xu
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China
| | - Xiangjun Chen
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China
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Wu F, Chen X, Shan X, Tian SX, Li Z, Xu K. Conformational Stability of 1-Butene: An Electron Momentum Spectroscopy Investigation. J Phys Chem A 2008; 112:4360-6. [DOI: 10.1021/jp710757y] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fang Wu
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, and Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Xiangjun Chen
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, and Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Xu Shan
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, and Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Shan Xi Tian
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, and Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Zhongjun Li
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, and Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Kezun Xu
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, and Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
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16
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Li Z, Chen X, Shan X, Xue X, Liu T, Xu K. Experimental observation of relativistic effects on electronic wavefunction for iodine lone-pair orbital of CF3I. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.04.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Li ZJ, Shan X, Yang XF, Li-Qing Chen,, Xu KZ, Chen XJ. Valence Electronic Structures of CH2BrCl and CF2BrCl: Binding Energy Spectra and Electron Momentum Distributions. J Phys Chem A 2008; 112:942-9. [DOI: 10.1021/jp709645d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhong-Jun Li
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
| | - Xu Shan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
| | - Xue-Feng Yang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
| | - Li-Qing Chen,
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
| | - Ke-Zun Xu
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
| | - Xiang-Jun Chen
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
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