NDLI: Broadening of the $Ca^{+}$and $Mg^{+}$resonance lines by collision with atomic hydrogen

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Broadening of the $Ca^{+}$and $Mg^{+}$resonance lines by collision with atomic hydrogen

Content Provider	Scilit
Author	Monteiro, T. S. Danby, G. Cooper, I. L. Dickinson, A. S. Lewis, E. L.
Copyright Year	1988
Description	Journal: Journal of Physics B: Atomic, Molecular and Optical Physics The broadening and shift of the astrophysically important resonance lines of singly ionised calcium and magnesium due to collisions with atomic hydrogen were calculated. Adiabatic molecular potentials for $CaH^{+}$ and $MgH^{+}$ were obtained from ab initio molecular structure programs, assuming frozen cores. Reasonable agreement was obtained with published calculations for these potentials, where available. The collision dynamics were treated semiclassically and broadening rates evaluated over a temperature range 500-5000 K. The results for broadening were larger than other theoretical estimates, based on long-range forces, but agree well with the values derived from analyses of solar profiles. Difficulties of correlating the broadening of a given spectral line by helium with that produced by atomic hydrogen are discussed. Values for the shifts and the fine-structure changing rates are also reported.
Related Links	http://iopscience.iop.org/article/10.1088/0953-4075/21/24/016/pdf
Ending Page	4175
Page Count	11
Starting Page	4165
ISSN	09534075
e-ISSN	13616455
DOI	10.1088/0953-4075/21/24/016
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Issue Number	24
Volume Number	21
Language	English
Publisher	IOP Publishing
Publisher Date	1988-12-28
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics B: Atomic, Molecular and Optical Physics Atomic, Molecular and Chemical Physics Atomic Hydrogen Resonance Lines Collision with Atomic
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics

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