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The diffiention and composition of liquid scintillation detector?
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What is beta counter?
In the beta-counter or liquid scintillation counter, the sample is dissolved in an organic scintillation solution. Due to the resulting 100% counting geometry and the absence of any detector window, this means that the counter has excellent properties in detecting radionuclides of low activity emitting low energy beta-particles, such as H3 and C14. The light photons from the sample are collected by two photomultipliers in coincidence. This arrangement will reduce the background due to thermal noise and only true scintillation events will be analysed and counted. The main problem in liquid scintillation counting is the varying counting efficiency due to quenching of scintillation events. This process is caused by chemical contamination of the sample and/or a coloured sample. This means that the counting efficiency has to be determined for every sample. Therefore a quality control of the instrument must include a control of the correction methods. Otherwise the QC methods will be the same as for any scintillation counter. The sources needed for QC of a liquid scintillation counter include calibrated sources of H3 and C14 with different counting efficiencies as well as a background sample.
What is the difference between a liquid and its chemical composition?
A liquid is a compound or a mixture; the chemical composition is representative for this liquid.
What is the pressure detector placed in a vessel to measure the level of a liquid?
DiFFERENTIAL PRESSURE LEVEL DETECTOR
What has the author Brian W Fox written?
Brian W. Fox has written: 'Christie's' -- subject(s): Cancer, Christie Hospital, History, Holt Radium Institute, Hospitals 'Techniques of sample preparation of liquid scintillation counting' -- subject(s): Isoelectric focusing, Liquid scintillation counting
What has the author Phillip L Howard written?
Phillip L. Howard has written: 'Basic liquid scintillation counting' -- subject(s): Laboratory Diagnosis, Liquid scintillator counting
What is the different between scintillation and hyper pure germanium detector?
Scintillation is a fluctuation in the amplitude of a target on a radar display. It is closely related to target glint, or wander, an apparent displacement of the target from its mean position. This effect can be caused by a shift of the effective reflection point on the target, but has other causes as well. The fluctuations can be slow (scan-to-scan) or rapid (pulse-to-pulse).It appears especially at seaside level.Scintillation and glint are actually two manifestations of the same phenomenon and are most properly linked to one another in target modeling.hyperpure germanium detector:A variant of the lithium-drifted germanium crystal which uses high-purity germanium, making it possible to store the detector at room temperature rather than liquid nitrogen temperature. Read more: hyperpure-germanium-detector
What is the composition of the liquid?
The composition of liquid air is: 80 % nitrogen, 19 % oxygen 0,9 % argon, 0,1 % minor gases.
What is the composition of liquid air?
The composition of liquid air is: 80 % nitrogen, 19 % oxygen 0,9 % argon, 0,1 % minor gases.
What is the composition of a cumulus cloud?
the composition of a cumulus cloud is liquid water and dust particles
What happens to the composition of matter during a physical change?
It can change from a gas to a solid to a liquid, or from a liquid to a solid to a gas. This change does not affect the composition of the matter.
Milk is liquid curd is semisolid why?
The chemical composition is different.
How would you measure americium?
Data from a MSDS:• A survey meter equipped with a G-M pancake or thin-window probe (with window thickness < 0.2 mg/cm2) is effective for detecting Am-241. Detection efficiency is between 5% (end window) and 25% (upper range pancake probe).• A survey meter equipped with a alpha scintillation probe is suitable for detection of the Am-241. Typical efficiency is 25%-35%.• Either a gamma counter or a liquid scintillation counter may be used to detect removable Am-241 contamination on wipe tests smears. The efficiency for a liquid scintillation counter can be 100% for detection of alphas.
