Excitation processes in collisions of He/sup +/ ions with N/sub 2/ molecules

Journal Article · Thu Nov 01 04:00:00 EST 1979 · Sov. Phys. - Tech. Phys. (Engl. Transl.); (United States)

OSTI ID:5173938

Gochitashvili, M R; Ankudinov, V A; Lavrov, V M; Kikiani, B I

The cross sections for visible emission at the intense lines of helium, the nitrogen atom and ion, and the cross sections for emission in the first negative band system (the transition B/sub u//sup +/..sigma../sup +//sub u/--X/sup 2/..sigma../sup +//sub g/) of the N/sup +//sub 2/ ion are measured for He/sup +/ energies from 0.2 to 10 keV. The results show that at helium ion energies in the range 5--10 keV the N/sup +//sub 2/ ions are formed primarily in the B/sup 2/..sigma../sup +//sub u/ state. The predominant mechanism is charge exchange involving the capture of an electron to the ground state of the helium atom. Excited helium atoms are formed with a high probability in the course of dissociative charge exchange. The excitation of atomic nitrogen ions results from cascade transitions from high-lying levels, which are populated because of Rydberg states of the molecular ion N/sup +//sub 2/.

• Research Organization: A. F. Ioffe Physicotechnical Institute, Academy of Sciences of the USSR, Leningrad
• OSTI ID: 5173938
• Journal Information: Sov. Phys. - Tech. Phys. (Engl. Transl.); (United States), Journal Name: Sov. Phys. - Tech. Phys. (Engl. Transl.); (United States) Vol. 24:11; ISSN SPTPA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CAPTURE
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELECTRON CAPTURE
ELEMENTS
EMISSION SPECTRA
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 100-1000
EXCITATION
FLUIDS
HELIUM IONS
ION COLLISIONS
ION-MOLECULE COLLISIONS
KEV RANGE
KEV RANGE 01-10
MOLECULE COLLISIONS
NITROGEN
NONMETALS
SPECTRA