Calculated thickness of tungsten alloy required for specified attenuation of gamma radiation from sup 137 CS

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Description

The traditional method of evaluating and calibrating health physics instruments is to use a calibrator that consists of a single high-activity gamma radiation source with different attenuators to select the radiation level desired for tesing. To have accurate radiation intensities inside the calibrator cavity, the attenuators must be designed from precise absorption calculations. This paper reports 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. 3 refs., 2 figs., 3 tabs.

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Pages: (5 p)

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Chiles, M.M.; Allin, G.W. & Pace, J.V. III. January 1, 1991.

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Description

The traditional method of evaluating and calibrating health physics instruments is to use a calibrator that consists of a single high-activity gamma radiation source with different attenuators to select the radiation level desired for tesing. To have accurate radiation intensities inside the calibrator cavity, the attenuators must be designed from precise absorption calculations. This paper reports 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. 3 refs., 2 figs., 3 tabs.

Physical Description

Pages: (5 p)

Notes

OSTI; NTIS; INIS; GPO Dep.

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  • Nuclear science symposium, Santa Fe, NM (United States), 5-9 Nov 1991

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  • Other: DE92002706
  • Report No.: CONF-911106-6
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 5005144
  • Archival Resource Key: ark:/67531/metadc1054255

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1991

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  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 22, 2018, 7:03 p.m.

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Chiles, M.M.; Allin, G.W. & Pace, J.V. III. Calculated thickness of tungsten alloy required for specified attenuation of gamma radiation from sup 137 CS, article, January 1, 1991; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1054255/: accessed July 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.