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Proceedings Paper

Dosimetry of neutron beams with energy of hundreds of MeV
Author(s): Natalia Golnik; M. Zielczynski
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Paper Abstract

The existing cavity theories do not consider situations where the ranges of secondary heavy particles exceed the thickness of the wall of the ionization chamber. The cavity theory was modified, by introducing the wall correction coefficients, (beta) , to account for the influence of the ionization chamber wall material. The values of the coefficients (beta) were found experimentally in high energy neutron beam generated at 660 MeV phasotron in Dubna. A thin walled ionization chamber with replaceable radiators made of different materials was used for this purpose. The absorbed dose was determined in dependence on depth in a water phantom. Some necessary dosimetric parameters like the energy expended to create an ion pair and the restricted stopping power ratios were determined using correlation between these quantities and the recombination index of radiation quality. The accuracy achieved in measurements using a tissue equivalent chamber is estimated to about 4 percent at depth of 12 cm.

Paper Details

Date Published: 27 February 1997
PDF: 10 pages
Proc. SPIE 2867, International Conference Neutrons in Research and Industry, (27 February 1997); doi: 10.1117/12.267912
Show Author Affiliations
Natalia Golnik, Institute of Atomic Energy (Poland)
M. Zielczynski, Institute of Atomic Energy (Poland)

Published in SPIE Proceedings Vol. 2867:
International Conference Neutrons in Research and Industry
George Vourvopoulos, Editor(s)

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