A NEUTRON SENSOR-BASED ON SUPERHEATED DROPLETS

The neutron sensor based on superheated droplets, developed in the U.S .A. and U.K., is one of the most attractive techniques at present for neutron radiation dosimetry. Limited shelf life, i.e. six months (BTI, U.K.), and the dependence of neutron response on climatic conditions are some of the problems associated with these sensors. The developmen t of the above type of sensor suitable for tropical conditions is ther efore required. The authors have begun to develop such sensors. The pr eliminary results show a lower limit of detection of 10 muSv for an Am -241-Be neutron source and a linear response from 10 muSv to 1 mSv has been reported.