Accession Number : ADA321005

Title :   Construction Features of a Circuit for Coincidence Measurements and Applications of the Circuit to Nuclear Problems,

Corporate Author : TECHNICAL INFORMATION SERVICE (AEC) OAK RIDGE TN

Personal Author(s) : Moak, C. D.

PDF Url : ADA321005

Report Date : 30 APR 1945

Pagination or Media Count : 11

Abstract : The inherent characteristics required of a coincidence circuit for nuclear research, as pointed out by Norling are: (1) high resolving power, (2) ability of the circuit to function properly at high single counting rates, (3) low sensitivity to external electrical disturbances, and (4) the circuit shall register a constant percentage, or preferably all of the coincidences. It has been found here that each of the listed characteristics is more or less dependent upon the others so that optimum operating conditions must be determined. An outline of the uses of a coincidence circuit and an outline of the present basic design principles are in order here. The coincidence circuit has been found valuable in the examination of the decay schemes of natural and artificial radioactivities, i.e. the evaluation of internal conversion coefficients or the determination of gamma/beta ratios. It has been used to measure gamma ray energies by Compton recoil absorption. Some work has been done also in the measurement of very short half-lives. The detection of certain radioactive isotopes in the presence of large radioactive contaminations is made possible through the use of the coincidence circuit.

Descriptors :   *CIRCUIT ANALYSIS, *COINCIDENCE COUNTING, *GEIGER COUNTERS, ELECTRONS, GAMMA RAYS, RADIOACTIVITY, GOLD, XENON, RADIOACTIVE ISOTOPES, TRIODES, BETA PARTICLES, DECAY SCHEMES, COMPTON SCATTERING, BETA COUNTERS, PENTODES, GAMMA RAY ABSORPTION COEFFICIENTS.

Subject Categories : Nuclear Instrumentation
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE