Rotational effects in the band oscillator strengths and predissociation linewidths for the lowest {sup 1}{pi}{sub u}X {sup 1}{sigma}{sub g}{sup +} transitions of N{sub 2}
Abstract
A coupledchannel Schroedinger equation (CSE) model of N{sub 2} photodissociation, which includes the effects of all interactions between the b, c, and o {sup 1}{pi}{sub u} and the C and C{sup '} {sup 3}{pi}{sub u} states, is employed to study the effects of rotation on the lowest{upsilon} {sup 1}{pi}{sub u}X {sup 1}{sigma}{sub g}{sup +}({upsilon},0) band oscillator strengths and {sup 1}{pi}{sub u} predissociation linewidths. Significant rotational dependences are found which are in excellent agreement with recent experimental results, where comparisons are possible. New extremeultraviolet (EUV) photoabsorption spectra of the key b {sup 1}{pi}{sub u}<X {sup 1}{sigma}{sub g}{sup +}(3,0) transition of N{sub 2} are also presented and analyzed, revealing a b({upsilon}=3) predissociation linewidth peaking near J=11. This behavior can be reproduced only if the triplet structure of the C state is included explicitly in the CSEmodel calculations, with a spinorbit constant A{approx_equal}15 cm{sup 1} for the diffuse C({upsilon}=9) level which accidentally predissociates b({upsilon}=3). The complex rotational behavior of the bX(3,0) and other bands may be an important component in the modeling of EUV transmission through nitrogenrich planetary atmospheres.
 Authors:

 Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200 (Australia)
 Publication Date:
 OSTI Identifier:
 20723265
 Resource Type:
 Journal Article
 Journal Name:
 Journal of Chemical Physics
 Additional Journal Information:
 Journal Volume: 123; Journal Issue: 21; Other Information: DOI: 10.1063/1.2134704; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 00219606
 Country of Publication:
 United States
 Language:
 English
 Subject:
 74 ATOMIC AND MOLECULAR PHYSICS; EXTREME ULTRAVIOLET RADIATION; LS COUPLING; LINE WIDTHS; NITROGEN; OSCILLATOR STRENGTHS; PHOTONMOLECULE COLLISIONS; PREDISSOCIATION; ROTATION; ROTATIONAL STATES; SCHROEDINGER EQUATION; SIMULATION; ULTRAVIOLET SPECTRA
Citation Formats
Haverd, V E, Lewis, B R, Gibson, S T, Stark, G, and Department of Physics, Wellesley College, Wellesley, Massachusetts 02481. Rotational effects in the band oscillator strengths and predissociation linewidths for the lowest {sup 1}{pi}{sub u}X {sup 1}{sigma}{sub g}{sup +} transitions of N{sub 2}. United States: N. p., 2005.
Web. doi:10.1063/1.2134704.
Haverd, V E, Lewis, B R, Gibson, S T, Stark, G, & Department of Physics, Wellesley College, Wellesley, Massachusetts 02481. Rotational effects in the band oscillator strengths and predissociation linewidths for the lowest {sup 1}{pi}{sub u}X {sup 1}{sigma}{sub g}{sup +} transitions of N{sub 2}. United States. https://doi.org/10.1063/1.2134704
Haverd, V E, Lewis, B R, Gibson, S T, Stark, G, and Department of Physics, Wellesley College, Wellesley, Massachusetts 02481. 2005.
"Rotational effects in the band oscillator strengths and predissociation linewidths for the lowest {sup 1}{pi}{sub u}X {sup 1}{sigma}{sub g}{sup +} transitions of N{sub 2}". United States. https://doi.org/10.1063/1.2134704.
@article{osti_20723265,
title = {Rotational effects in the band oscillator strengths and predissociation linewidths for the lowest {sup 1}{pi}{sub u}X {sup 1}{sigma}{sub g}{sup +} transitions of N{sub 2}},
author = {Haverd, V E and Lewis, B R and Gibson, S T and Stark, G and Department of Physics, Wellesley College, Wellesley, Massachusetts 02481},
abstractNote = {A coupledchannel Schroedinger equation (CSE) model of N{sub 2} photodissociation, which includes the effects of all interactions between the b, c, and o {sup 1}{pi}{sub u} and the C and C{sup '} {sup 3}{pi}{sub u} states, is employed to study the effects of rotation on the lowest{upsilon} {sup 1}{pi}{sub u}X {sup 1}{sigma}{sub g}{sup +}({upsilon},0) band oscillator strengths and {sup 1}{pi}{sub u} predissociation linewidths. Significant rotational dependences are found which are in excellent agreement with recent experimental results, where comparisons are possible. New extremeultraviolet (EUV) photoabsorption spectra of the key b {sup 1}{pi}{sub u}<X {sup 1}{sigma}{sub g}{sup +}(3,0) transition of N{sub 2} are also presented and analyzed, revealing a b({upsilon}=3) predissociation linewidth peaking near J=11. This behavior can be reproduced only if the triplet structure of the C state is included explicitly in the CSEmodel calculations, with a spinorbit constant A{approx_equal}15 cm{sup 1} for the diffuse C({upsilon}=9) level which accidentally predissociates b({upsilon}=3). The complex rotational behavior of the bX(3,0) and other bands may be an important component in the modeling of EUV transmission through nitrogenrich planetary atmospheres.},
doi = {10.1063/1.2134704},
url = {https://www.osti.gov/biblio/20723265},
journal = {Journal of Chemical Physics},
issn = {00219606},
number = 21,
volume = 123,
place = {United States},
year = {2005},
month = {12}
}