Results 41 to 50 of about 1,458,589 (326)

Universal calibration of a scintillation spectrometer with a NaI(Tl) detector when measuring 137Cs activity in counting samples of arbitrary density and volume

Радиационная гигиена, 2021
The article proposes an empirical method for constructing a universal calibration for a scintillation gamma spectrometer, which allows determining the activity and specific activity of 137Cs with an accuracy of no more than 15% in counting samples of ...
K. A. Sednev, V. A. Nekrasov, V. S. Repin   +2 more
doaj   +1 more source

222Rn Determination in Water and Brine Samples Us-ing Liquid Scintillation Spectrometry

Brazilian Journal of Radiation Sciences, 2019
Liquid scintillation spectrometry (LSC) is the most common technique used for 222Rn determination in environmental aqueous sample. In this study, the performance of water-miscible (Ultima Gold AB) and immiscible (Optiscint) liquid scintillation cocktails
Thiago César Oliveira, Roberto Pellacani Guedes Monteiro, Rubens Martins Moreira, Arno Heeren de Oliveira   +3 more
doaj   +1 more source

Scintillation and cherenkov photon counting detectors with analog silicon photomultipliers for TOF-PET

Physics in Medicine and Biology
Objective. Standard signal processing approaches for scintillation detectors in positron emission tomography (PET) derive accurate estimates for 511 keV photon time of interaction and energy imparted to the detection media from aggregate characteristics ...
J. Cates, W.-S. Choong, Erik Brubaker
semanticscholar   +1 more source

Basic Performance Evaluation of a Radiation Survey Meter That Uses a Plastic-Scintillation Sensor

Sensors
After the Fukushima nuclear power plant accident in 2011, many types of survey meters were used, including Geiger–Müller (GM) survey meters, which have long been used to measure β-rays.
Keisuke Yamamoto, Ryota Shindo, Saya Ohno, Satoe Konta, Rio Isobe, Yohei Inaba, Masatoshi Suzuki, Yoshio Hosoi, Koichi Chida   +8 more
doaj   +1 more source

Multiwell 14CO2-Capture Assay for Evaluation of Substrate Oxidation Rates of Cells in Culture

BioTechniques, 1998
14CO2 capture is commonly used to evaluate the cellular oxidation rate of respiratory substrates. A modification of the established 14CO2-capture method was developed that enables the use of cells in adherent culture and easy analysis of multiple samples
Cynthia L. Collins, Barrie P. Bode, Wiley W. Souba, Steve F. Abcouwer   +3 more
doaj   +1 more source

An Advanced Optimization Method to Minimize the Detection Limit of Liquid Scintillation Counter to Measure Low-Level Tritium Activity in Groundwater

Radiation, 2023
In arid regions, the tritium concentration in groundwater is typically very low and often falls below the minimum detectable activity (MDA) of the conventional liquid scintillation counter (LSC).
Al Mamun
doaj   +1 more source

Assessment of Uptake and Biodistribution of Radiolabeled Cholesterol in Mice Using Gavaged Recombinant Triglyceride-rich Lipoprotein Particles (rTRL)

Bio-Protocol, 2018
The here described method can be used to estimate the uptake of orally provided cholesterol in mice. Briefly, mice are gavaged with radiolabeled cholesterol and 4 h later, organ distribution of the radiolabel is determined by liquid scintillation ...
Anna Worthmann, Clara John, Joerg Heeren
doaj   +1 more source

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

Die Anwendung radiochemischer Analysenmethoden zur Bestimmung von Zink- und Calciumspuren in Gallium

CHIMIA, 1961
The method ot thermal neutron activation analysis has been utilized for the determination of calcium and zinc traces in metallic gallium. This method allows to measure amounts of calcium as low as one p.p.m.
Pierre Lerch, Leo Kreienbühl
doaj   +1 more source

Defect Analysis of the β– to γ–Ga2O3 Phase Transition

Advanced Functional Materials, EarlyView.
The role of defects at all the relevant stages of the β$\beta$‐ to γ$\gamma$‐Ga2O3 polymorph transition is investigated using a multi method approach. The positron annihilation spectroscopy based results show that the defect density decreases after the transition, and that changes in defect configuration within the γ phase occur with increasing ...
Umutcan Bektas, Maciej O. Liedke, Huan Liu, Fabian Ganss, Maik Butterling, Nico Klingner, René Hübner, Ilja Makkonen, Andreas Wagner, Gregor Hlawacek   +9 more
wiley   +1 more source