Korean J Med Phys.  2005 Jun;16(2):97-103.

Neutron Generation from a 24 MV Medical Linac

• Lee JO
• Jeong DH
• Kang JK

Abstract

The energy spectra and dose calculations were performed for secondary neutrons from a 24 MV LINAC using MCNPX code (V2, 4, 0). The energy spectra for neutrons and photons emitted from the LINAC head, and absorbed dose to water were calculated in water phantom. The absorbed doses calculated with Monte Carlo were 0.66~0.35 mGy/photon Gy at the surface to d=5 cm, and calculated with interaction data was 0.52 mGy/photon Gy at the depth of electron equilibrium in water. We have shown that this work can be applied to dose estimation of neutrons from high energy LINAC through the comparison of our results with other results.

Keyword

Neutron; MCNPX; LINAC

MeSH Terms

Head
Neutrons*
Photons
Water
Water