Velocity-selected atomic-beam collisions in the energy range from 300 to 5 K

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.42.675· OSTI ID:6506516

Wang, Y; Weiner, J ^[1]

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1. Department of Chemistry and Biochemistry, University of Maryland, College Park, MD (USA)

We report cross-section measurements of the associative-ionization process, Na(3{ital p}{sup 2}{ital P}{sub 3/2})+Na(3{ital p}{sup 2}{ital P}{sub 3/2}){r arrow}Na{sub 2}{sup +}+{ital e} as a function of velocity, alignment, and orientation in the collision energy range from 300 to 5 K. Two independently tunable laser beams select narrow velocity classes of excited sodium in a well-collimated atomic beam. Circular and linear polarization of the excitation lasers permits alignment and orientation of the excited atoms in the two velocity classes. The excitation functions show pronounced differences reflecting different molecular pathways to the final product, and they bridge the energy range between conventional and cold'' collision dynamics.

• OSTI ID: 6506516
• Journal Information: Physical Review, A (General Physics); (USA), Journal Name: Physical Review, A (General Physics); (USA) Vol. 42:1; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
BEAM DYNAMICS
BEAM-BEAM INTERACTIONS
COLLISIONS
ELEMENTS
ENERGY LEVELS
IONIZATION
METALS
P STATES
SODIUM