Performance evaluation of lithium formate dosimeter

Lithium formate dosimeter system is being developed for the dose range 50-1250 Gy. The performance of this dosimeter for use in radiation processing dosimetry was investigated by carrying out dose mapping in product box of Food Package Irradiator and comparing the doses measured by the system with that of Fricke dosimeters placed at identical positions in the product box. It is clear that the maximum difference between the dose values measured by Fricke and lithium formate dosimeters for identical dosimeter position was found to be ± 8 %. As the maximum difference between the dose values measured by lithium formate dosimeters and Fricke dosimeters for identical dosimeter position is within ± 10% (1σ), this dosimetry system qualifies for radiation processing dosimetry as per the limits specified by International Dose Assurance Services of IAEA