Accession Number : AD0452958


Title :   EXPERIMENTAL DETERMINATION OF THE GAMMA-RAY ANGULAR DOSE ALBEDOS OF CONCRETE, ALUMINUM AND STEEL


Corporate Author : NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA


Personal Author(s) : Haggmark, L G ; Jones, T H ; Scofield, N E ; Gurney, W J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/452958.pdf


Report Date : 06 Oct 1964


Pagination or Media Count : 70


Abstract : The angular distribution of dose albedo was measured for semi- infinite concrete, aluminum and steel slabs irradiated by plane-parallel beams of Co(60) and Cs(137) gamma photons. The photons were incident on the slabs at angles, measured from a normal to the slab, of arccos 1.00, 0.75 and 0.50. For the necessary sensitivity, the reflected dose rate was measured by a digital dosimetry system using a plastic scintillator as the detector. An empirical formula for angular dose albedo was derived from the experimental data. Comparisons are made with the Monte Carlo calculations of D. J. Raso and the experimental results of C. E. Clifford.


Descriptors :   *RADIATION MEASURING INSTRUMENTS , *GAMMA RAY SCATTERING , CONCRETE , REFLECTION , STEEL , SURFACES , ALUMINUM , DOSAGE , GAMMA RAYS , TABLES(DATA) , DOSE RATE , DETERMINATION , ENERGY , MEASUREMENT , SCATTERING


Subject Categories : Nuclear Instrumentation


Distribution Statement : APPROVED FOR PUBLIC RELEASE