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3. Liquid scintillation counters
The simplest liquid scintillation counter would consist of a measuring chamber with a vial holder and a photodetector connected to counting electronics. In practice, however, the physical limitations of the available photodetectors mean that the design is generally more complex.
3.1 Photodetectors and measuring chamber
As the liquid scintillation process is highly inefficient overall, the average number of photons emitted can be very low, which means that highly sensitive photodetectors must be used, and the measuring chamber must be optimized to detect the maximum number of light photons emitted.
The photodetector used is usually a photomultiplier tube. This detector comprises a transparent photocathode that emits electrons photoelectrically...
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Liquid scintillation counters
Activity measurement with standard
Bibliography
Bibliography
Standards
Radioactivity measurement by liquid scintillation
- Nuclear instruments – Liquid scintillation counting systems – Function control. - CEI 61304 - 1994
- Water quality – Determining tritium activity by volume – Liquid scintillation counting method. - ISO 9698 -
- Measuring radioactivity – Determining the activity of β-emitting radionuclides – Liquid scintillation counting test method. - NF ISO 19361 - 2017 ...
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Teaching
The Institut National des Sciences et Techniques Nucléaires INSTN organizes several annual continuing education courses on liquid scintillation measurement techniques. http://www-instn.cea.fr
Learned societies and congresses
An international congress on the development of liquid scintillation techniques is...
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