Spectral fluence rates of the fast reactor neutron beam MedApp at FRM II

Harald Breitkreutz, Franz M. Wagner, Anton Röhrmoser, Winfried Petry

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

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 languageEnglish
Pages (from-to)466-471
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume593
Issue number3
DOIs
StatePublished - 11 Aug 2008

Keywords

  • Fast neutrons
  • Fission neutrons
  • MCNP
  • Neutron spectra
  • Neutron therapy

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