Wide Energy Range Gamma-Ray Calibration Source

0437325 - ÚIACH 2015 RIV GB eng J - Journal Article
Kroupa, M. - Granja, C. H. - Janout, Z. - Králik, M. - Krejčí, F. - Owens, A. - Pospíšil, S. - Quarati, F. - Šolc, J. - Vobecký, Miloslav
Wide Energy Range Gamma-Ray Calibration Source.
Journal of Instrumentation. Roč. 6, Nov (2011), s. 1-12. ISSN 1748-0221. E-ISSN 1748-0221
Institutional support: RVO:68081715
Keywords : prompt gamma-rays * gamma spectroscopy * detector calibration * thermal neutron capture
Subject RIV: CB - Analytical Chemistry, Separation
Impact factor: 1.869, year: 2011

Calibration source with monoenergetic gamma-ray lines in wide energy range designed for gamma-ray detector energetic calibration and testing has been built. Gamma-rays are obtained from thermal neutron capture, which is a suitable and cost efficient way how to provide discrete gamma-ray lines with energies above 3 MeV with reasonable intensity. With appropriate and interchangeable targets the source can generate different gamma-ray spectra with energy up to 10 MeV. We present the data obtained with neutron capture on chlorine, but other elements with high thermal neutron capture cross-section such as chrome, iron, nickel and titanium can be used as well. As neutron source we employ radionuclide source 241Am-Be with emission rate about 106 neutrons/s. The emitted fast neutrons are moderated by a moderator made of light materials such as graphite, standard water or heavy water. Performance of the source is demonstrated by calibration spectra measured by HPGe and scintillation detectors.
Permanent Link: http://hdl.handle.net/11104/0240939