Accession Number : AD0680671

Title :   RADIATIVE LIFETIMES IN THE RESONANCE SERIES OF Ar I.

Descriptive Note : Research Communication no. 70,

Corporate Author : DOUGLAS AIRCRAFT CO INC HUNTINGTON BEACH CALIF ADVANCED RESEARCH LABS

Personal Author(s) : Lawrence,George M.

Report Date : AUG 1968

Pagination or Media Count : 25

Abstract : Radiative lifetimes of the six lowest-energy J = 1 levels of Ar I were measured with a pulsed electron technique. The wavelengths and measured lifetimes in nanoseconds are given. Estimates of branching ratios were made where necessary, and f-values for the above transitions are given. Lifetimes of cascading levels estimated with a two-exponential fit are consistent with known lifetimes of Ar I visible lines. Extrapolation to zero pressure to account for photon entrapment was made for lifetimes enlarged less than 30 percent. (Author)

Descriptors :   (*ARGON, ATOMIC ENERGY LEVELS), (*ATOMIC ENERGY LEVELS, RELAXATION TIME), NUCLEAR RESONANCE, SELECTION RULES(PHYSICS), EXCITATION, INTERACTIONS, ELECTRON IRRADIATION, TABLES(DATA)

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE