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Title: Photoelectron angular distributions from rotationally resolved autoionizing states of N2

Journal Article · · Journal of Chemical Physics
DOI: https://doi.org/10.1063/1.5004538 · OSTI ID:1422406
 [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)

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.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1422406
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 22 Vol. 147; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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