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Energy dependence of the differential photoelectron cross sections of molecular nitrogen

Mintz, Donald M. and Kuppermann, Aron (1978) Energy dependence of the differential photoelectron cross sections of molecular nitrogen. Journal of Chemical Physics, 69 (9). pp. 3953-3966. ISSN 0021-9606. doi:10.1063/1.437133.

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The angular distribution of photoelectron intensity for molecular nitrogen was studied using He I and Ne I resonance line discharge light sources. Studies of photoelectron angular distributions covering a range of photon energies, and thus a range of photoelectron energies, are possible using the weaker high order lines in each discharge as well as the principal lines. Peaks in three photoelectron bands of N_2 were studied at the photon energies 16.85, 19.78, 21.22, 23.09, and 23.74 eV, where possible. We find that the v′=0 peak of the X^ 2Σ^+_g band has abnormally high intensity and, at the higher photon energies, an abnormally low angular distribution asymmetry parameter, β. Several mechanisms for this anomaly are discussed, including autoionization, the variation of electric dipole transition moments with internuclear distance, and possible shape resonance phenomena. None of these explanations is completely in agreement with all theoretical and experimental evidence.

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Additional Information:© 1978 American Institute of Physics. Received 14 March 1978. Online Publication Date: 11 August 2008. Work supported in part by the Department of Energy (Contract No. EY-76-S-03-767). Report Code: CALT-767P4-157. Work performed in partial fulfillment of the requirements for the Ph. D. degree in Chemistry at the California Institute of Technology. Present address: TRW Defense and Space Systems Group, Redondo Beach, CA 90278. Contribution No. 5746. We are grateful to Dr. Thomas N. Rescigno and Dr. C. William McCurdy for supplying a computer program to calculate momentum-normalized nuclear continuum wavefunctions.
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Department of Energy (DOE)EY-76-S-03-767
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Other Numbering System NameOther Numbering System ID
Caltech Arthur Amos Noyes Laboratory of Chemical Physics5746
Caltech Report CodeCALT-767P4-157
Issue or Number:9
Classification Code:PACS: 33.60.+q, 33.80.Eh
Record Number:CaltechAUTHORS:20120802-092617363
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Official Citation:Energy dependence of the differential photoelectron cross sections of molecular nitrogen Donald M. Mintz and Aron Kuppermann J. Chem. Phys. 69, 3953 (1978);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32869
Deposited By: Ruth Sustaita
Deposited On:02 Aug 2012 16:44
Last Modified:09 Nov 2021 21:30

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