A range modulator to produce uniform 38K yield

A range modulator has been designed for use with a monoenergetic proton beam to achieve uniform yield of a nuclear reaction with depth in a tissue equivalent medium. Uniform yield to ±1.5% over a 10 cm depth for the reaction 40Ca( p, 2 pn) 38K has been demonstrated using protons of 160 MeV initial e...

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Bibliographic Details
Published in:The International journal of applied radiation and isotopes 1976-12, Vol.27 (12), p.707-708
Main Authors: Eilbert, R.F., Koehler, A.M., Sisterson, J.M.
Format: Article
Language:English
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Summary:A range modulator has been designed for use with a monoenergetic proton beam to achieve uniform yield of a nuclear reaction with depth in a tissue equivalent medium. Uniform yield to ±1.5% over a 10 cm depth for the reaction 40Ca( p, 2 pn) 38K has been demonstrated using protons of 160 MeV initial energy. The modulator is a rotating stepped absorber made of stacked acrylic plastic sheets. The angular extent of eachsheet is determined by a computer program which also calculates the resultant depth dose curve. Peaks in the dose curve may be reduced with slight effect on the yield curve.
ISSN:0020-708X
DOI:10.1016/0020-708X(76)90016-8