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Title: Photoelectron angular distributions from rotationally resolved autoionizing states of N 2

Abstract

The single-photon, photoelectron-photoion coincidence spectrum of N 2 has been recorded at high (~1.5 cm -1) resolution in the region between the N 2 + X 2Σ g +, v + = 0 and 1 ionization thresholds by using a double imaging spectrometer and intense vacuum-ultraviolet light from the Synchrotron SOLEIL. This approach provides the relative photoionization cross section, the photoelectron energy distribution, and the photoelectron angular distribution as a function of photon energy. The region of interest contains autoionizing valence states, vibrationally autoionizing Rydberg states converging to vibrationally excited levels of the N 2 + X 2Σ g + ground state, and electronically autoionizing states converging to the N 2 + A 2Π and B 2Σ u + states. The wavelength resolution is sufficient to resolve rotational structure in the autoionizing states, but the electron energy resolution is insufficient to resolve rotational structure in the photoion spectrum. Here, a simplified approach based on multichannel quantum defect theory is used to predict the photoelectron angular distribution parameters, β, and the results are in reasonably good agreement with experiment.

Authors:
 [1]; ORCiD logo [2];  [3];  [4]; ORCiD logo [5];  [6]; ORCiD logo [7];  [7];  [8]
  1. Bryn Mawr College, Bryn Mawr, PA (United States)
  2. Bryn Mawr College, Bryn Mawr, PA (United States); Bowdoin College , Brunswick, ME (United States)
  3. ETH Zurich, Zurich (Switzerland)
  4. Daresbury Lab., Cheshire (United Kingdom)
  5. Univ. Paris-Sud, Univ. Paris-Saclay, Orsay (France)
  6. Synchrotron Soleil, Gif-sur-Yvette (France); Chinese Academy of Sciences, Anhui (China)
  7. Synchrotron Soleil, Gif-sur-Yvette (France)
  8. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; USDOE
OSTI Identifier:
1422406
Alternate Identifier(s):
OSTI ID: 1411991
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 147; Journal Issue: 22; Journal ID: ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; Photoionization; Photoelectron Spectroscopy; Photoelectron Angular Distributions

Citation Formats

Chartrand, A. M., McCormack, E. F., Jacovella, U., Holland, D. M. P., Gans, Berenger, Tang, Xiaofeng, Garcia, G. A., Nahon, L., and Pratt, S. T. Photoelectron angular distributions from rotationally resolved autoionizing states of N2. United States: N. p., 2017. Web. doi:10.1063/1.5004538.
Chartrand, A. M., McCormack, E. F., Jacovella, U., Holland, D. M. P., Gans, Berenger, Tang, Xiaofeng, Garcia, G. A., Nahon, L., & Pratt, S. T. Photoelectron angular distributions from rotationally resolved autoionizing states of N2. United States. doi:10.1063/1.5004538.
Chartrand, A. M., McCormack, E. F., Jacovella, U., Holland, D. M. P., Gans, Berenger, Tang, Xiaofeng, Garcia, G. A., Nahon, L., and Pratt, S. T. Fri . "Photoelectron angular distributions from rotationally resolved autoionizing states of N2". United States. doi:10.1063/1.5004538. https://www.osti.gov/servlets/purl/1422406.
@article{osti_1422406,
title = {Photoelectron angular distributions from rotationally resolved autoionizing states of N2},
author = {Chartrand, A. M. and McCormack, E. F. and Jacovella, U. and Holland, D. M. P. and Gans, Berenger and Tang, Xiaofeng and Garcia, G. A. and Nahon, L. and Pratt, S. T.},
abstractNote = {The single-photon, photoelectron-photoion coincidence spectrum of N2 has been recorded at high (~1.5 cm-1) resolution in the region between the N2+ X 2Σg+, v+ = 0 and 1 ionization thresholds by using a double imaging spectrometer and intense vacuum-ultraviolet light from the Synchrotron SOLEIL. This approach provides the relative photoionization cross section, the photoelectron energy distribution, and the photoelectron angular distribution as a function of photon energy. The region of interest contains autoionizing valence states, vibrationally autoionizing Rydberg states converging to vibrationally excited levels of the N2+ X 2Σg+ ground state, and electronically autoionizing states converging to the N2+ A 2Π and B 2Σu+ states. The wavelength resolution is sufficient to resolve rotational structure in the autoionizing states, but the electron energy resolution is insufficient to resolve rotational structure in the photoion spectrum. Here, a simplified approach based on multichannel quantum defect theory is used to predict the photoelectron angular distribution parameters, β, and the results are in reasonably good agreement with experiment.},
doi = {10.1063/1.5004538},
journal = {Journal of Chemical Physics},
number = 22,
volume = 147,
place = {United States},
year = {2017},
month = {12}
}

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    Works referencing / citing this record:

    Double-resonance studies of electronically autoionizing states of molecular nitrogen
    journal, January 2019


    Double-resonance studies of electronically autoionizing states of molecular nitrogen
    journal, January 2019