Spectra of the internally scattered radiation from large Co60 sources used in teletherapy

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DOIResolve DOI: http://doi.org/10.1016/0020-708X(64)90020-1
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TypeArticle
Journal titleThe International Journal of Applied Radiation and Isotopes
ISSN0020-708X
Volume15
Issue12
Pages713724; # of pages: 12
AbstractBecause of internal scattering and degradation of the 1.33 and 1.17 MeV quanta, the beam of radiation from a Co60 teletherapy unit includes a continuous spectrum extending well below 1 MeV. The form of this spectrum below 1 MeV and its intensity relative to the radiation above 1 MeV have been investigated for sources of various dimensions. The influence of the material around the source, the relative spectral contributions of different parts of the source, and the spectra from bare sources outside the teletherapy head have also been studied. Methods of designing source and head to minimize the radiation below 1 MeV may be inferred from the graphs.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NRC number8159
NPARC number21275061
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Record identifierc6155e9b-98d4-4b84-bf72-7cc2a2292349
Record created2015-05-06
Record modified2016-05-09
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