TDCR measurements of 3H, 63Ni and 55Fe using Hidex 300SL LSC device

Liquid scintillation counting for determination of radionuclides in environmental and nuclear application

“…3 H, 241 Pu, 89 Sr and 90 Sr. It can provide relative rapid and precise measurement compared to other methods, 4) LSC has been well used for determination of naturally occurred radionuclides, and still an attractive method for the determination of 222 Rn, 228 Ra and 210 Pb because of its easy operation, short analytical time, and reliable analytical results. LSC has also becoming more popular method for the determination of gross alpha and gross beta activity for screening purpose.…”

“…Thus, the introduction of a new parameter into the algorithm of counting efficiency determination would be required to yield a singlevalued efficiency vs. TDCR curve [46]. Hidex TDCR LSA has been used for the measurement of 55 Fe in radioactive waste, irradiated steel and urine samples [4,[47][48]].…”

“…A series of international conferences dedicated to this technique have been organized for 23 editions since 1957, and the last conference (LSC 2017) was organized in 2017 in Copenhagen (http://lsc2017.nutech.dtu.dk). In the instrumentation and methodology aspects, the major progresses in the past decades are the commercialization of triple-to-double coincidence ratio (TDCR) based instrument, which can implement socalled absolute measurement without the quench curve or standard addition for efficiency calibration [1][2][3][4]. The determination of radionuclides using plastic scintillation resin and conventional LSC instrument has being proposed and shown a promising application, especially for the rapid analysis, which can avoid the utilization of the organic scintillator, therefore reduce the organic radioactive waste [5][6][7][8].…”

“…A stochastic TDCR model based on the Monte Carlo code Geant4, has also constructed to determine the Cerenkov efficiency using the experimental TDCR value [50]. These TDCR Cerenkov models have been successfully tested for the activity standardizations of 90 Y, 89 Sr and 68 Ge in nuclear medicine applications [4,51]. The TDCR Cerenkov method would allow for calculating the counting efficiency without an external or internal standard source.…”

Intercomparison exercise on difficult to measure radionuclides in activated concrete—statistical analysis and comparison with activation calculations

“…volatile and non-volatile) were carried out by mixing aliquots of the purified fractions with liquid scintillation cocktails (mainly Ultima Gold, but also Optiphase HiSafe 3) prior to the LSC measurements using counters such as Quantulus 1220 LSC, HIDEX 300SL, and AccuFLEX LSC-8000. The measurement efficiencies were determined using standard solutions for quenching corrections or TDCR (Triple-to-Double Coincidence Ratio) technique [28].…”