Absorbed Dose Calibration of an Ion Chamber

Journal Article · Sat Jun 29 04:00:00 EDT 1963 · Nature (London)

DOI:https://doi.org/10.1038/1981318b0· OSTI ID:4702163

BEWLEY, D. K.

A method for calibrating an ion chamber in terms of absorbed dose is given which avoids the need for corrections for attenuation. The absorbed dose is measured using a carbon calorimeter, a carbon chamber, and a BaldwinFarmer chamber. The method was used with x-ray beams at 4 to 20 Mv and Co⁶⁰ gamma rays. The mean energy per ion pair in air at 0 deg C 760 mm Hg was determined to be 34.11 plus or minus 0.21 ev in carbon. A graph is given for the rad calibration factor of the Baldwin- Farmer chamber exposed in Perspex. (D.L.C.)

• Research Organization: Hammersmith Hospital, London
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-029214
• OSTI ID: 4702163
• Journal Information: Nature (London), Journal Name: Nature (London) Journal Issue: 4887 Vol. 198; ISSN 0028-0836
• Publisher: Nature Publishing Group
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
CALORIMETERS
CARBON
COBALT 60
DIAGRAMS
ENERGY
ENERGY LEVELS
GAMMA RADIATION
INSTRUMENTS AND INSTRUMENTATION
IONIZATION CHAMBERS
MEASURED VALUES
PAIR PRODUCTION
PLEXIGLAS
POLYMERS
RADIATION DOSES
STANDARDS
X RADIATION