Accession Number : AD0690072

Title :   A SYSTEM FOR MEASURING NANOSECOND ATOMIC LIFETIMES.

Descriptive Note : Research communication no. 93,

Corporate Author : DOUGLAS ADVANCED RESEARCH LABS HUNTINGTON BEACH CALIF

Personal Author(s) : Lawrence,George M.

Report Date : MAR 1969

Pagination or Media Count : 26

Abstract : A multi-channel time interval recording system used for radiative lifetime measurements in the vacuum ultraviolet is described. This recording system exhibits an overall 'prompt' decay lifetime of 400 psec. The effect of differential nonlinearities is eliminated by the simultaneous, absolute calibration of each channel width, accomplished with the aid of a crystal time standard, a scaler, fast inhibit logic, and a random pulse source. Coincidence selection before time-to-height concersion allows repetition rates to 10 MHz. Pulsed electron excitation allows studies of atomic and molecular optical radiation and dissociative excitation. (Author)

Descriptors :   (*ATOMIC SPECTROSCOPY, *TIME INTERVAL COUNTERS), EXCITATION, ULTRAVIOLET RADIATION, PULSE HEIGHT ANALYZERS, TIME TO PULSE HEIGHT CONVERTERS, PHOTOMULTIPLIER TUBES, CALIBRATION, RESOLUTION

Subject Categories : Nuclear Instrumentation
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE