Detection and dosimetry of gamma ray emitted from thallium-201 and technetium-99m based on chemiluminescence technique

This report describes the detection and dosimetry of gamma ray emitted from Thallium-201 (201Tl) and Technetium-99m (99mTc) based on chemiluminescence technique. H2O2 produced by two gamma emitter radioisotopes of 201Tl and 99mTc were quantitatively measured by chemiluminescence method. Upon producing H2O2 in a luminol alkaline solution, in the presence of diperiodatocuprate, as catalyst a chemical reaction was accrued and consequently the emitted light was measured. The determined H2O2 concentration was correlated with the gamma ray detection and dosimetry. The sensitivity of chemiluminescence technique for 201Tl and 99mTc dosimetry was determined to be 0.20 and 0.08 MBq/l (Mega Becquerel per liter) respectively (R.S.D. = %5, N = 3). The plotted calibration curves showed detection limits of 3.24 and 1.76 MBq/l for 201Tl and 99mTc, respectively.