Abstract
The MedApp facility at the research reactor FRM II supplies a beam of fast neutrons created by thermal fission of 235U. It can be used for medical applications like the irradiation of human cancer, for radiography and tomography in non-destructive material characterisation as well as for the irradiation of technical and biological objects. For such applications, a detailed knowledge of the neutron spectrum is required. To determine the spectrum, a MCNP simulation was performed and verified by multiple foil activation. An equalisation calculation confirmed the achieved spectral shape. The total flux was measured using a modified gold-water-bath technique. The geometrical shape of the beam was mapped using indium wires.
Original language | English |
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Pages (from-to) | 466-471 |
Number of pages | 6 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 593 |
Issue number | 3 |
DOIs | |
State | Published - 11 Aug 2008 |
Keywords
- Fast neutrons
- Fission neutrons
- MCNP
- Neutron spectra
- Neutron therapy