Chemi-ionization in collisions of metastable argon with sodium. [0. 01 to 10 eV]

Journal Article · Fri Jul 15 00:00:00 EDT 1977 · J. Chem. Phys.; (United States)

OSTI ID:7142297

Neynaber, R H; Magnuson, G D

Absolute and relative cross sections were obtained for the Penning-ionization (PI) reaction Ar*+Na..-->..Ar+Na/sup +/+e and the associative-ionization (AI) reaction Ar*+Na..-->..ArNa/sup +/+e. The studies were made by a merging-beams technique for a relative kinetic energy W of the reactants from nominally 0.01 to 10 eV for PI and 0.01 to 0.4 eV for AI. The Ar* represents a composite of Ar(4s /sup 3/P/sub 2/) and Ar(4s /sup 3/P/sub 0/). The PI is directed and occurs predominantly when the difference between the relative kinetic energy of the heavy products and the reactants is approximately 0.1 eV. Cross sections for AI are roughly proportional to W/sup -1/. Cross sections for total ionization (AI plus PI) vary as W/sup -1///sup 3/ for the lower W.

• Research Organization: IRT Corporation, San Diego, California 92138
• OSTI ID: 7142297
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 67:2; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ARGON
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
BEAMS
COLLIDING BEAMS
COLLISIONS
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EV RANGE
EV RANGE 01-10
EXCITED STATES
IONIZATION
METALS
METASTABLE STATES
MILLI EV RANGE
NONMETALS
PENNING EFFECT
RARE GASES
SODIUM