Electron-impact excitation of the vibrational levels of the c/sub 4//sup '/ /sup 1/. sigma. /sub u//sup +/ electronic state of the nitrogen molecule

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.39.383· OSTI ID:6794890

Allen, J S; Lin, C C

Electron-impact excitation of the excited vibrational levels of the c/sub 4//sup '/ /sup 1/..sigma../sub u//sup +/ state of the nitrogen molecule has been studied. We measure the electron-impact optical emission cross sections of the (1,2), (4,0), and (4,1) vibration bands of the c/sub 4//sup '/..-->..a electronic transition of the nitrogen molecule and compare them with the direct electron-impact cross sections of the c/sub 4//sup '/(v') vibrational levels reported in the literature. The Franck-Condon factors between the ground vibrational level of the X /sup 1/..sigma../sub g//sup +/ ground electronic state and the various vibrational levels of c/sub 4//sup '/ have been calculated and compared with the electron-impact cross sections. The excitation cross sections of the v' = 4 level of c/sub 4//sup '/ are several orders of magnitude higher than predicted by the Franck-Condon picture. This discrepancy is due to the perturbations of the c/sub 4//sup '/(v' = 4) level by the b' /sup 1/..sigma../sub u//sup +/ state.

• Research Organization: Department of Physics, University of Wisconsin, Madison, Wisconsin 53706
• OSTI ID: 6794890
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 39:1; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
CONFIGURATION MIXING
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FRANCK-CONDON PRINCIPLE
INTERACTIONS
MOLECULE COLLISIONS
NITROGEN
NONMETALS
VIBRATIONAL STATES