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USE OF 4[pi] HIGH-PRESSURE IONIZATION CHAMBERS AS SECONDARY STANDARDS FOR CALIBRATION OF GAMMA-RAY SOURCES

Author
Peelle, R. W.
Published
United States : [publisher not identified], 1961.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1961.
Physical Description
microopaque : positive ; 8 x 13 cm

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Summary
Procedures used to standardize the strengths of a number of encapsulated gamma sources used to calibrate the sensitivity of Compton and pair scintillation gamma spectrometers designed to determine the spectrum of prompt gamma rays from fission of U/sup 2//sup 3//sup 5/ are described. Calibration of the ion-chamber response vs. source intensity was accomplished using calibration data obtained by W. S. Lyon. Instrumental drifts as a function of time were compensated using the observed response to long-lived sources. Calibration of the absolute efficiency of the chamber for various radioactive isotopes was performed in a method, based on an approximate calculation of this efficiency from crosssection data, on a number of absolute source calibrations using coincidence techniques, and on the existing ionchamber efficiency ratios determined by W. S. Lyon. Attention was given to detailed estimates of the accuracy of the procedures used. (auth)
Report Numbers
CF-61-4-32
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
NSA number: NSA-15-018212
OSTI Identifier 4011421
Research organization: Oak Ridge National Lab., Tenn..
View MARC record | catkey: 39681854