Energy-dependent cross sections for quenching of Na(3p /sup 2/P) by several gases

Journal Article · Sun Aug 15 00:00:00 EDT 1976 · J. Chem. Phys.; (United States)

OSTI ID:7356327

Barker, J R; Weston, Jr, R E

The lifetime of Na(3p /sup 2/P) atoms, in the presence of various quenching gases (H/sub 2/, D/sub 2/, N/sub 2/, CO, CO/sub 2/, and C/sub 2/H/sub 4/), has been directly determined by the single-photon time-correlation method. Na(/sup 2/P) atoms were produced with varying amounts of translational energy by photodissociation of NaI with light of wavelengths 215--240 nm. The large cross sections obtained, and their inverse dependence on relative collisional energy, are best explained on the basis of a ''harpooning'' mechanism, in which a strongly attractive ionic state provides the coupling between upper and lower covalent states. (AIP)

• Research Organization: Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 7356327
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 65:4; 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
ALKENES
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DE-EXCITATION
DEUTERIUM
ELEMENTS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
ETHYLENE
FLUIDS
FLUORESCENCE
HYDROCARBONS
HYDROGEN
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
LUMINESCENCE
METALS
MOLECULE COLLISIONS
NITROGEN
NONMETALS
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONLESS DECAY
SODIUM
STABLE ISOTOPES