Angular distribution of the ambient neutron dose equivalent from incidence of alpha particles on thick Al target

In this study, the measured data of angular distribution of neutron dose equivalent due to neutrons arising from the bombardment of 19.8 and 30 MeV alpha particles on a thick aluminium target has been reported. These measurements have been carried out at the BARC-TIFR Pelletron Linac Accelerator Facility using neutron dose equivalent meters popularly known as REM meters. The neutron dose equivalent values measured at a distance of 1 m from the target at various angles relative to the incident beam direction are presented here. The values are compared with those predicted by the empirical formulation of Clapier & Zaidins.