Liquid xenon (LXe) is a well-studied detector medium to search for rare events in dark matter and neutrino physics. Two-phase time projection chambers (TPCs) can detect electronic nuclear recoils with energy down kilo-electron volts (keV). In this paper, we characterize the response of single-phase liquid proportional scintillation counter (LXePSC), which produces electroluminescence directly l...

Iodine-131 has become an essential radionuclide used in nuclear medicine for clinical and research purposes. The increase use of this diagnostic treatment thyroid diseases creates a demand to obtain feasible methodology occupational or accidental monitoring internal contamination. In study, two techniques were employed find appropriate one vivo bioassay evaluating body content. A scanning Whole...

The results of research on the application method measurement gross alpha-, beta-activity in water using liquid scintillation counter (LSC) Quantulus 1220 are presented. Basic procedures preparation and spectrometric aqueous samples were studied performed. detection efficiency beta-particles depending quenching optimum beta-radiation separation parameter for used determined. Testing validation ...

The Organic Bound Tritium (OBT) amount in the body may induce changes in the evaluation of the internal exposure to tritium, due to its different retention time relative to HTO. OBT measurements for urine are not performed routinely, mainly because of the lengthy work needed in preparation of the samples, when using the standard oxygen combustion method. A simpler and more rapid method based on...

The urinary excretion test for vitamin B12 absorption devised by Schilling, Clatanoff, and Korst (1955) and Callender and Evans, in the same year, is probably the most commonly used method in the assessment of this function of the gut, and particularly in the diagnosis of pernicious anaemia. The reproducibility of the results obtained in this manner and the convenience of the procedure compared...

The use of low-background liquid scintillation counting (ISC) techniques permits the simultaneous measurement of both alpha and beta emitters with efficiencies close to 100%. In this study, the counting parameters of a Wallac 1220TM Quantulus IS counter have been optimized for the best possible separation of the a and 3 spectra when measuring a sample containing 8 ml of water and 12 ml of Optip...

Scintillation noise due to the Earth’s turbulent atmosphere can be a dominant noise source in high-precision astronomical photometry when observing bright targets from the ground. Here we describe the phenomenon of scintillation from its physical origins to its effect on photometry. We show that Young’s scintillation-noise approximation used by many astronomers tends to underestimate the median...

The uncertainty in measurements of gross alpha and beta activities in water samples by liquid scintillation counting with alpha/beta discrimination has been evaluated considering the problems typical of low-level measurements of environmental samples. The use of a pulse shape analysis device to discriminate alpha and beta events introduces a correlation between some of the input quantities, and...