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

fYear

1991

fDate

2-9 Nov. 1991

Firstpage

1345

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/NSSMIC.1991.258825

Filename

258825