Dosimetry of neutron beams with energy of hundreds of MeV

Natalia Golnik; M. Zielczynski

doi:10.1117/12.267912

27 February 1997 Dosimetry of neutron beams with energy of hundreds of MeV

Natalia Golnik, M. Zielczynski

Proceedings Volume 2867, International Conference Neutrons in Research and Industry; (1997) https://doi.org/10.1117/12.267912
Event: Fifth International Conference on Applications of Nuclear Techniques: Neutrons in Research and Industry, 1996, Crete, Greece

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.

Citation Download Citation

Natalia Golnik and M. Zielczynski "Dosimetry of neutron beams with energy of hundreds of MeV", Proc. SPIE 2867, International Conference Neutrons in Research and Industry, (27 February 1997); https://doi.org/10.1117/12.267912

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