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Title: ROVIBRATIONALLY RESOLVED PHOTODISSOCIATION OF HeH{sup +}

Abstract

Accurate photodissociation cross sections have been obtained for the A{sup 1}{Sigma}{sup +} <- X{sup 1}{Sigma}{sup +} electronic transition of HeH{sup +} using ab initio potential curves and dipole transition moments. Partial cross sections have been evaluated for all rotational transitions from the vibrational levels v'' = 0-11 and over the entire accessible wavelength range {lambda}{lambda}100-1129. Assuming a Boltzmann distribution of the rovibrational levels of the X{sup 1}{Sigma}{sup +} state, photodissociation cross sections are presented for temperatures between 500 and 12,000 K. A similar set of calculations was performed for the pure rovibrational photodissociation in the X{sup 1}{Sigma}{sup +} electronic ground state, but covering photon wavelengths into the far-infrared. Applications of the cross sections to the destruction of HeH{sup +} in the early universe and in UV-irradiated environments such as primordial halos and protoplanetary disks are briefly discussed.

Authors:
;
Publication Date:
OSTI Identifier:
21576561
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 735; Journal Issue: 1; Other Information: DOI: 10.1088/0004-637X/735/1/21; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CATIONS; CROSS SECTIONS; DISSOCIATION; HELIUM HYDRIDES; PROTOPLANETS; UNIVERSE; CHARGED PARTICLES; HELIUM COMPOUNDS; HYDRIDES; HYDROGEN COMPOUNDS; IONS; RARE GAS COMPOUNDS

Citation Formats

Miyake, S, Gay, C D, and Stancil, P. C., E-mail: shinyam@physast.uga.edu, E-mail: stancil@physast.uga.edu, E-mail: cgay1383@gmail.com. ROVIBRATIONALLY RESOLVED PHOTODISSOCIATION OF HeH{sup +}. United States: N. p., 2011. Web. doi:10.1088/0004-637X/735/1/21.
Miyake, S, Gay, C D, & Stancil, P. C., E-mail: shinyam@physast.uga.edu, E-mail: stancil@physast.uga.edu, E-mail: cgay1383@gmail.com. ROVIBRATIONALLY RESOLVED PHOTODISSOCIATION OF HeH{sup +}. United States. https://doi.org/10.1088/0004-637X/735/1/21
Miyake, S, Gay, C D, and Stancil, P. C., E-mail: shinyam@physast.uga.edu, E-mail: stancil@physast.uga.edu, E-mail: cgay1383@gmail.com. 2011. "ROVIBRATIONALLY RESOLVED PHOTODISSOCIATION OF HeH{sup +}". United States. https://doi.org/10.1088/0004-637X/735/1/21.
@article{osti_21576561,
title = {ROVIBRATIONALLY RESOLVED PHOTODISSOCIATION OF HeH{sup +}},
author = {Miyake, S and Gay, C D and Stancil, P. C., E-mail: shinyam@physast.uga.edu, E-mail: stancil@physast.uga.edu, E-mail: cgay1383@gmail.com},
abstractNote = {Accurate photodissociation cross sections have been obtained for the A{sup 1}{Sigma}{sup +} <- X{sup 1}{Sigma}{sup +} electronic transition of HeH{sup +} using ab initio potential curves and dipole transition moments. Partial cross sections have been evaluated for all rotational transitions from the vibrational levels v'' = 0-11 and over the entire accessible wavelength range {lambda}{lambda}100-1129. Assuming a Boltzmann distribution of the rovibrational levels of the X{sup 1}{Sigma}{sup +} state, photodissociation cross sections are presented for temperatures between 500 and 12,000 K. A similar set of calculations was performed for the pure rovibrational photodissociation in the X{sup 1}{Sigma}{sup +} electronic ground state, but covering photon wavelengths into the far-infrared. Applications of the cross sections to the destruction of HeH{sup +} in the early universe and in UV-irradiated environments such as primordial halos and protoplanetary disks are briefly discussed.},
doi = {10.1088/0004-637X/735/1/21},
url = {https://www.osti.gov/biblio/21576561}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 735,
place = {United States},
year = {Fri Jul 01 00:00:00 EDT 2011},
month = {Fri Jul 01 00:00:00 EDT 2011}
}