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Rotational and vibrational excitation in the large-angle scattering of Na/sup +/ ions from N/sub 2/ molecules

Journal Article · · Phys. Rev. A; (United States)
; ; ;
Differential scattering of Na/sup +/ ions from N/sub 2/ molecules was studied at laboratory energies of 100less than or equal toE/sub lab/less than or equal to350 eV and scattering angles of 15/sup 0/less than or equal tothetaless than or equal to45/sup 0/. The energy-loss spectra were measured with the time-of-flight technique. The experimental results were analyzed by the classical trajectory calculation. The spectra measured at small angles show a typical double-peak structure, while at large angles the spectra are composed of the three peaks. The triple-peak structure can be explained in terms of the rainbow effect on the angular momentum transfer mechanism, by taking into account the direction of the final rotational angular momentum vector. A drastic structural change of the energy-loss spectra was observed around the reduced scattering angle of tau = 8 keV deg, independent of the collision energy. This can also be attributed to the rainbow effect arising from vibrational excitation.
Research Organization:
Research Institute for Scientific Measurements, Tohoku University, 1-1 Katahira-Nichome, Sendai 980, Japan
OSTI ID:
7087504
Journal Information:
Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:10; ISSN PLRAA
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
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELEMENTS
ENERGY DEPENDENCE
ENERGY LEVELS
ENERGY LOSSES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 100-1000
EXCITATION
EXCITED STATES
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONS
LOSSES
MOLECULE COLLISIONS
NITROGEN
NONMETALS
ROTATIONAL STATES
SODIUM IONS
VIBRATIONAL STATES