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Medium-resolution studies of extreme ultraviolet emission from N sub 2 by electron impact: Vibrational perturbations and cross sections of the c sub 4 sup prime sup 1. Sigma. sub u sup + and b prime sup 1. Sigma. sub u sup + states

Journal Article · · Physical Review (Section) A: General Physics; (USA)
; ;  [1];  [2]
  1. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 (US)
  2. Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona 85712
+ Show Author Affiliations

We have studied in a crossed-beam experiment the electron-impact-induced fluorescence spectrum of N{sub 2} in the extreme ultraviolet (euv) at a spectral resolution of up to 0.03 nm. The optically thin experiment allowed us to obtain the highest-resolution electron-impact emission spectrum of the Rydberg and valence states of N{sub 2}. The spectral measurements provide the emission cross sections of each of the vibrational transitions of the {ital c}{sub 4}{sup {prime}} {sup 1}{Sigma}{sub u}{sup +}{r arrow}X {sup 1}{Sigma}{sub g}{sup +} Carroll-Yoshino band system and the {ital b}{prime} {sup 1}{Sigma}{sub u}{sup +}{r arrow}X {sup 1}{Sigma}{sub g}{sup +} Birge-Hopfield-II band system. The {ital c}{sub 4}{sup {prime}} {sup 1}{Sigma}{sub u}{sup +} and {ital b}{prime} {sup 1}{Sigma}{sub u}{sup +} states strongly perturb one another by homogeneous configuration interactions. This perturbation leads to vibrational-excitation cross sections whose dependence on {ital v}{prime} is quite different from the variation of the unperturbed Franck-Condon factors.

OSTI ID:
5336979
Journal Information:
Physical Review (Section) A: General Physics; (USA), Journal Name: Physical Review (Section) A: General Physics; (USA) Vol. 40:7; ISSN PLRAA; ISSN 0556-2791
Country of Publication:
United States
Language:
English

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Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
BEAMS
COLLIDING BEAMS
COLLISIONS
ELECTROMAGNETIC RADIATION
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
EXTREME ULTRAVIOLET RADIATION
MOLECULE COLLISIONS
NITROGEN
NONMETALS
RADIATIONS
RYDBERG STATES
ULTRAVIOLET RADIATION
VALENCE
VIBRATIONAL STATES