CHARACTERISTICS OF PULSED NEUTRON SOURCES OBTAINED WITH A LOW-ENERGY ELECTRON ACCELERATOR
ENEA, C.R.E. "E. Clementel"
Viale G.B. Ercolani 8, I-40138 Bologna, Italy
An account is presented of a work which was undertaken to provide for an accurate computational tool for planning neutron sources based on Deuteron photo-disintegration, making use of low-energy (10-20 MeV) electron accelerator. A programme reproduces, by Monte Carlo simulation, electron Bremsstrahlung, neutron generation and slowing-down processes. Results calculated for different shapes and sizes of heavy water targets are given. In particular, characteristics are presented of targets suited to neutron time-of-flight spectrometry. Measurements carried out at the 12 MeV Linac of CNR show good agreement with calculations. The capabilities of these sources for time-of-flight spectrometry are demonstrated by a total cross-section measurement on Al.
KEYWORDS: neutron sources, Deuterium, photoneutrons, time-of-flight