Accession Number : AD0669452

Title :   SPECTRAL MEASUREMENTS OF SCATTERED PHOTONS FROM A POINT SOURCE NEAR THE AIR-GROUND INTERFACE,

Corporate Author : NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF

Personal Author(s) : Frank,Allen L.

Report Date : 10 OCT 1967

Pagination or Media Count : 59

Abstract : A gamma-ray spectroscopy experiment was performed to measure the scattered photons from a point source near the air-ground interface. Source-to-detector radial distances of 9.7 and 20.6 ft. were used for a Cs137 source and 9.7 ft. for a Co60 source. The source height was 8 in. and the detector height was about 3 ft. The measured flux was separated into 10 degree vertical angular bins and the data were reduced to photon spectra by a matrix iteration procedure. Comparisons were made between the measurements and corresponding Monte Carlo calculated spectra. The angular exposures also were compared and the buildup factors were presented along with other buildup data from the literature. (Author)

Descriptors :   (*FALLOUT, SIMULATION), (*GAMMA RAY SPECTROSCOPY, FALLOUT), PHOTONS, SCATTERING, SOURCES, CESIUM, COBALT, INTENSITY

Subject Categories : Radioactiv, Radioactive Wastes & Fission Prod

Distribution Statement : APPROVED FOR PUBLIC RELEASE