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Title:PHOTOELECTRON SATELLITES AND ANGULAR DISTRIBUTION ASYMMETRY PARAMETERS OF ARGON ATOM STUDIED USING HHG EUV LIGHT
Author(s):Ma, Xinwen
Contributor(s):Zhao, Dongmei ; Lei, Jianting ; Dong, Dapu ; Najjari, Bennaceur ; Zhang, Min ; Zhang, Shaofeng ; Hai, Bang
Subject(s):Instrument/Technique Demonstration
Abstract:We have investigated the photoelectron properties of argon atom in the photon energy range near photoionization threshold, employing a reaction microscope and a newly-built HHG-based EUV laser system. Photoelectron spectra and angular distribution were obtained through momentum imaging for photoelectrons. Seven satellites were resolved besides the 3s and 3p main lines. The asymmetry parameters $\beta$ were determined for both the main lines and the satellites. It is found that our measured $\beta$ for the 3p and 3s main lines are in an excellent agreement with previous results reported by Houlgate et al. [1], Dehmer et al. [2], Adam et al. [3], which demonstrates the reliability of the new system and the data analysis procedure. Furthermore, by analyzing the angular distribution of quasi-degenerate satellites, the branch ratio was obtained, which accord closely with theoretical value. The $\beta$ parameters measured for the satellites are reported for the first time in this energy range, providing benchmark data for testing different theoretical models. [1] R. Houlgate, J. West, K. Codling, and G. Marr, Journal of Electron Spectroscopy and Related Phenomena 9, 205 (1976). [2] J. L. Dehmer, W. A. Chupka, J. Berkowitz, and W. T. Jivery, Phys. Rev. A 12, 1966 (1975). [3] M. Y. Adam, P. Morin, and G. Wendin, Phys. Rev. A 31, 1426 (1985) [4] B. Hai, et al., submitted to Phys. Rev. A (2020)
Issue Date:23-Jun-20
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/107646
Date Available in IDEALS:2020-06-26


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