Radiation Measurements Over Simulated Plane Sources

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Health Physics

DOI:https://doi.org/10.1097/00004032-196206000-00005· OSTI ID:4830333

Davis, F. J.; Reinhardt, P. W.

To better interpret aircraft measurements of fallout, a simulated plane source array was laid out with positions at 100-ft intervals in the form of a square each side of which measured 2000 ft. For ground measurements a smaller square array of 100 positions at 10-ft intervals was placed in the center of the large array. Two sets of sources were used in the array. Co⁶⁰ and Cs¹³⁷ sources of 4.5 and 15 mc, respectively, were available to be placed in the large array and sources one-hundredth of these values in the smaller array. Measurements 3 ft above ground indicated 200 mu r/hr for Co⁶⁰ and 225 mu r/hr for Cs¹³⁷. Measurements were made in aircraft at 100-ft intervals above the array using scintillation counters and a 256-channel scintillation spectrometer. Flights for comparison of point sources were made over Co⁶⁰ , Cs¹³⁷, and I¹³¹. Relationships of the radiation intensity. above point and plane sources as well as spectral data are given. For these sources the tests demonstrate that above ain heights the effect of build-up cannot be neglected but is adequately represented by a linear formula.

• Research Organization: Oak Ridge National Lab., Tenn.
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-019196
• OSTI ID: 4830333
• Journal Information: Health Physics, Journal Name: Health Physics Journal Issue: 3 Vol. 8; ISSN 0017-9078
• Publisher: Health Physics Society
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIRCRAFT
CESIUM 137
COBALT 60
CONFIGURATION
COUNTERS
FALLOUT
HEALTH AND SAFETY
IODINE 131
LEVELS
MATHEMATICS
MEASURED VALUES
MOCKUP
RADIATION SOURCES
RADIOACTIVITY
SCINTILLATION COUNTERS
SPECTRA
SPECTROMETERS
SURFACES