Excitation of Meinel and the first negative band system at the collision of electrons and protons with the nitrogen molecule

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.022702· OSTI ID:21448499

Gochitashvili, Malkhaz R; Lomsadze, Ramaz A ^[1]; Kezerashvili, Roman Ya ^[2]

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1. Physics Department, Tbilisi State University, Tbilisi 380028 (Georgia)
2. Physics Department, New York City College of Technology, City University of New York, Brooklyn, New York 11201 (United States)

The absolute cross sections for the e-N{sub 2} and p-N{sub 2} collisions for the first negative B{sup 2{Sigma}}{sub u}{sup +}-X{sup 2{Sigma}}{sub g}{sup +} and Meinel A{sup 2{Pi}}{sub u}-X{sup 2{Sigma}}{sub g}{sup +} bands have been measured in the energy region of 400-1500 eV for electrons and 0.4-10 keV for protons, respectively. Measurements are performed in the visible spectral region of 400-800 nm by an optical spectroscopy method. The ratio of the cross sections of the Meinel band system to the cross section of the first negative band system (0,0) does not depend on the incident electron energy. The populations of vibrational levels corresponding to A{sup 2{Pi}}{sub u} states are consistent with the Franck-Condon principle. The ratios of the cross sections of (4,1) to (3,0) bands and (5,2) to (3,0) bands exhibit slight dependence on the proton energy. A theoretical estimation within the quasimolecular approximation provides a reasonable description of the total cross section for the first negative band.

• OSTI ID: 21448499
• Journal Information: Physical Review. A, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevA.82.022702; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTROSCOPY
APPROXIMATIONS
ELECTRON-MOLECULE COLLISIONS
ELECTRONS
EV RANGE
EXCITATION
FRANCK-CONDON PRINCIPLE
ION-MOLECULE COLLISIONS
KEV RANGE
MOLECULES
NITROGEN
PROTONS
TOTAL CROSS SECTIONS
VIBRATIONAL STATES
BARYONS
CALCULATION METHODS
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FERMIONS
HADRONS
ION COLLISIONS
LEPTONS
MOLECULE COLLISIONS
NONMETALS
NUCLEONS
SPECTROSCOPY