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

✍ Scribed by Harald Breitkreutz; Franz M. Wagner; Anton Röhrmoser; Winfried Petry

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 838 KB
• Volume: 593
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2008.05.008

✦ Synopsis

The MEDAPP facility at the research reactor FRM II supplies a beam of fast neutrons created by thermal fission of 235 U. 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.