Title :
Calculated thickness of tungsten alloy required for specified attenuation of gamma radiation from /sup 137/Cs
Author :
Chiles, M.M. ; Allin, G.W. ; Pace, J.V., III
Author_Institution :
Oak Ridge Nat. Lab., TN, USA
Abstract :
The traditional method of evaluating and calibrating health physics instruments is to use a calibrator that consists of a single high-activity gamma radiation level desired for testing. To have accurate radiation intensities inside the calibrator cavity, the attenuator must be designed from precise absorption calculations. The authors report calculations made to determine the thickness of tungsten alloy metal required for specific attenuation. These calculations include the buildup contribution by secondary scattering radiation, and they are compared to values calculated with the buildup factor omitted.<>
Keywords :
calibration; gamma-ray detection and measurement; radiation monitoring; shielding; tungsten alloys; /sup 137/Cs; absorption calculations; calibrator; gamma radiation; health physics instruments; secondary scattering radiation; specified attenuation; Attenuation; Attenuators; Electromagnetic radiation; Electromagnetic scattering; Electromagnetic wave absorption; Gamma rays; Instruments; Laboratories; Radiation monitoring; Tungsten;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.258825
