Application of fluorine-based threshold activation detector for neutron flux calculation from D-T neutron generator
National Centre for Nuclear Research (NCBJ), Electronics and Detection Systems Division (TJ2),
A. Soltana 7,
† CAEN S.p.A., Via Vetraia 11, 55049, Viareggio (LU), Italy
Published online: 20 January 2020
In this paper we propose a method of fast neutron flux estimation from a pulsed D-T neutron generator with application of single CaF2 scintillation crystal. The analysis method relies on 19F(n, α)16N threshold activation reaction having neutron energy threshold at 1.6 MeV. As a result, the 16N undergo β− decay with half-life of 7.1 s, emitting β particles with endpoint up to 10.4 MeV in the scintillator medium. Integration of the β distribution curve, preceded by calculation of (n, α) rate on F with Monte Carlo N-Particle Transport Code v6 (MCNP6) for fixed geometry, allows to estimate the neutron flux in 4π per second within few minutes.
Key words: neutron detection / Threshold Activation Detection / scintillator / neutron generator
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.