NEUTRON RESPONSE OF A LASER-HEATED THERMOLUMINESCENCE DOSIMETRY SYSTEM

A laser-heated thermoluminescence dosimetry (LHTLD) system was-tested for albedo response to mono-energetic neutrons ranging in energy from 200 keV to 2.8 MeV. For neutron response measurements, pairs of magnes ium borate ((MgB4O7)-B-10/11:Tm) and lithium fluoride ((LiF)-Li-6/7:Mg ,Ti) phosphor chips were used. In general, the LHTLD system based on ( MgB4O7)-B-10/11:Tm shows response similar to the LiF system, that is a decreasing response ratio (R = dose read/dose applied) with increasin g neutron energy approaching a response of 0.07 for higher energies. I n addition, the neutron responses consistently indicates a higher resp onse for the LiF system than the LHTLD system by about 22%, possibly d ue in part to the internal shielding of non-albedo thermal neutrons in the LHTLD badge. Published by Elsevier Science Ltd.