University of Illinois Urbana-Champaign

Photoelectron satellites and angular distribution asymmetry parameters of argon atom studied using hhg euv light

Ma, Xinwen

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https://hdl.handle.net/2142/107646

Description

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
Issue Date
2020-06-23
Keyword(s)
Instrument/Technique Demonstration
Date of Ingest
2020-06-26T03:04:47Z
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)
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
Text
Genre of Resource
Conference Paper / Presentation
Language
eng
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http://hdl.handle.net/2142/107646
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Copyright 2020 is held by the Author(s)

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Abstracts & Presentations - 2020 International Symposium on Molecular Spectroscopy PRIMARY