Ionospheric scintillation has a great impact on radio propagation and electronic system performance, thus is extensively studied currently. The influence of scintillation on Global Navigation Satellite System (GNSS) is particularly evident, making GNSS an effective medium to study characteristics of scintillation. Ionospheric scintillation varies greatly in relation with temporal and spatial di...

The present study involves an analysis of the performance of liquid chromatography (LC)-accurate radioisotope counting (ARC) and microplate scintillation counter (TopCount) technologies in drug metabolism studies. For the purpose of evaluating these systems, biological samples resulting from the metabolism of a radiolabeled [14C] compound, known as compound B, are analyzed using LC-ARC and TopC...

The availability of radioactive isotopes of iron led to the development of reliable methods of studying iron kinetics (1), but the absorption of iron by the gastrointestinal tract was still determined indirectly by the amount of unabsorbed iron excreted in the stools or by quantification of isotopic iron incorporated into hemoglobin (2-7). The availability of a whole-body counter in a clinical ...

In this study, the scintillation and optical properties of pure and silver doped potassium chloride (KCl:Ag) single crystals were reported. Pure and doped KCl bulk single crystals with a good optical quality and free from cracks were grown from the melt using Czochralski technique. Different analysis methods were used to study the optical and scintillation properties of the grown crystals. The ...

ESTIMATION of cardiac output by the indicator-dilution method has been described by Kinsman, Moore, and Hamilton1 utilizing dye; however, radioactive methods for determination of cardiac output owe their inception to Prinzmetal and co-workers,2 who recorded radioactivity as a function of time by means of a counter over the heart after an intravenous injection of radioactive Na24. Nylin and Cela...

Tritium levels in the groundwater of arid regions are very low; most cases, these low tritium cannot be detected using a conventional liquid scintillation counter (LSC). To measure activity concentration, low-level needs to enriched by known factor so that can detect it. An electrolysis process with electrolytic cells was designed and fabricated our laboratory following International Atomic Ene...

Over the last few decades many techniques have been developed for determination of Sr/Y in the environment. Čerenkov counting technique (developed in the 1960s) is widely used, but can be further developed by the application of emerging technologies. For example, it is believed that the application of the triple-to-double coincidence ratio (TDCR) liquid scintillation counting method can be used...

Measurements have been performed with a 2.85 MeV mono-energetic neutron beam of relative scintillation efficiency and pulse-shape for nuclear and electron recoils in NaI(Tl) and CaF2(Eu). Scintillation efficiencies in NaI(Tl) relative to 60 keV gamma events were found to be 27.5 ± 1.8 % for Na recoils (recoil energy Erec > 4 keV) and 8.6 ± 0.7 % for I recoils (Erec > 10 keV). Relative scintilla...

Liquid scintillation counting (LSC) is an adequate nuclear technique to determine radioactivity levels, as verified by this study for the determination of the gross alpha and beta activities of aqueous samples because of its simplicity and low associated cost comparison with other techniques. This paper discusses a new approach to the monitoring of gross alpha and gross beta activities in water...

The effect of a random phase diffuser on fluctuations of laser light (scintillations) is studied. Not only spatial but also temporal phase variations introduced by the phase diffuser are analyzed. The explicit dependence of the scintillation index on finite-time phase variations is obtained for long propagation paths. It is shown that for large amplitudes of phase fluctuations, a finite-time ef...