Comment on Saddle-point shifts in ionizing collisions''

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.51.1709· OSTI ID:6642268

Bernardi, G; Meckbach, W ^[1]

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1. Comision Nacional de Energia Atomica, Centro Atomico Bariloche and Instituto Balseiro, Universidad Nacional de Cuyo, 8400 San Carlos de Bariloche (Argentina)

Irby [ital et] [ital al]. [Phys. Rev. A 47, 2957 (1993)] claim that their experimental results, obtained with C[sup +], C[sup 2+], and C[sup 3+] projectiles on He and Ne targets, strongly support the hypothesis of an independent saddle-point'' ionization mechanism for intermediate ion-atom collision velocities. They state that in previous measurements, in which single-stage electron analyzers were used, this process has been obscured by reflected and secondary electrons. We present experimental evidence that this effect exists, but is insignificant. We suggest that they may have observed a remnant of convoy-cusp electrons, which subsists at an emission angle of 10[degree].

• OSTI ID: 6642268
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 51:2; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CALCULATION METHODS
CARBON IONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DATA ANALYSIS
ELEMENTS
ENERGY SPECTRA
FLUIDS
GASES
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
NONMETALS
RARE GASES
SADDLE-POINT METHOD
SENSITIVITY
SPECTRA