Neutron Spectrum Measurements at a 40-MeV Proton Cyclotron
- 1 November 1985
- journal article
- research article
- Published by Wolters Kluwer Health in Health Physics
- Vol. 49 (5) , 919-936
- https://doi.org/10.1097/00004032-198511000-00023
Abstract
A set of seven activation reactions has been selected for neutron spectral analysis in the environment of a proton-cyclotron target. This choice of reactions: 59Co(n, p) 59Fe, 59Co(n, 2n) 58Co, 59Co(n, 3n) 57Co, 197Au(n, gamma) 198Au, 197Au(n 2n) 196Au, 197Au(n 4n) 194Au 27Al(n, alpha) 24Na, analyzed by means of a Ge(Li) detector, reduces to a minimum of three the number of activation detectors employed, and makes possible convenient and accurate spectral measurcments to at least 40 MeV. Criteria for selection of the activation materials from a list of candidates are discussed. A detailed comparisan of the unfolding programs LYRA and SAND is made, and reasons are given for our choice of SAND in our application. Spectra of neutrons emitted at 0o, 45o and 90o from thick targets of Al, Fe, Cu, Ta and stainless steel, irradiated by 40-MeV protons at the Milan AVF cyclotron, using the analysis technique described, are given and discussed.Keywords
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