THE USE OF IONIZATION CHAMBERS AS SECONDARY STANDARDS OF X-RAY EXPOSURE
Technical Report
·
OSTI ID:4272671
The use or calibrated ionization chambers to determine the total amount of energy transported by a well collimated bremsstrahlung beam, with a peak energy between 18 and 170 Mev, is discussed. Three chambers are described which have been used for this purpose, and their relative merits are discussed. The first chamber is an r-thinble which was calibrated calorimetrically between 18.2 and 36.7 Mev. The other two chambers are flat chambers, designed to intercept the entire beam. They were calibrated calorimetrically in the same energy range, and in addition, they were calibrated with a total absorption crystal spectrometer at a variety or energies up to 170 Mev. These calibration are all presented, and compared with those obtained in other laboatories, where possible. (auth)
- Research Organization:
- National Bureau of Standards, Washington, D.C.
- NSA Number:
- NSA-13-009939
- OSTI ID:
- 4272671
- Report Number(s):
- NBS-6218
- Country of Publication:
- United States
- Language:
- English
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