In situ neutron spectrometry to 60 MeV in a water phantom exposed to a cancer therapy beam.
In-air and in-phantom neutron spectra have been measured between 10 and 60 MeV for two field sizes on the Clatterbridge cyclotron by unfolding the response of a specially built NE213 scintillator. The in-phantom measurements show distinct spectral hardening with depth, which is reflected in changes in the spectrum-averaged mean neutron energy. These findings are confirmed using Monte Carlo calculations.
Crout
N M
NM
Medical Physics Group, School of Physics and Space Research, University of Birmingham, UK.
Fletcher
J G
JG
Green
S
S
Scott
M C
MC
Taylor
G C
GC
D005214:Fast Neutrons; D006801:Humans; D008961:Models, Structural; D009369:Neoplasms / Q000532:radiotherapy; D010315:Particle Accelerators; D011882:Radiotherapy, High-Energy; D013057:Spectrum Analysis; D014867:Water
D014867:Water