ENVINET a.s.

SAD Model - Alpha Radiation Detection Scintillators

These polycrystalline scintillators are designed for a simple detection of alpha radiation. The luminescent material (phosphor) made of silver activated zinc sulphide is homogeneously deposited on an organic glass light guide.

Technická data

SAB Model - Alpha/Beta Radiation Detection Scintillators

The combined scintillators are designed for the measurements of alpha and beta radiation in the unified probes. When measuring beta radiation, these scintillators are suitable for detection of medium and high energy beta radiation. While measuring alpha radiation these scintillators can detect alpha particles within a wide range of energies. Alpha detection phosphor is made of silver activated zinc sulphide and the scintillation plastic foil is used for detection of beta radiation.

Technical data

Sak15 Model - Alpha-Beta Detection Assembly

SAK 15 alpha-beta detection assembly is designed to meet the needs for the fi eld contamination monitoring of alpha and beta radiation. Plastic scintillator foil are supplied with a thin coating of ZnS(Ag) layer. This model of scintillation detector is suitable for the simultaneous and separable measurement of alpha and beta radiation with minimum interference from gamma background. If not specified, a standard 0,5 mm thick foil is supplied. The pulse height selection can be used to discriminate between the two types of particles. Time gated pulse shape discrimination is also available. To obtain an excellent surface sensitivity the dual phosphor is built in a larger conical or rectangular air light guide. Assemblies are supplied as a complete detection unit comprising an entrance window, a detector, a photomultiplier and a voltage divider. The detector face is protected against the puncture by a fine mesh, stainless steel grid. The light-tight entrance window is made of an aluminized plastic foil.
SAK N100 model has the housing body made from duralaluminum which promotes the ruggedness and ergonomic handling.

Technical data

Alpha Scintillation Chambers for Radon

Lucas cells are very important scintillation detectors tailored for measurement of ²²⁶ Ra and ²²² Rn concentrations. These cells are designed in the form of cylindrical chambers. At the one end the chamber is provided with a glass window, the opposite face is fitted with a gas-tight valve for evaluation and entering of the measured sample. A thin layer of ZnS(Ag) phosphor is applied to the interior surface of the metal shell.

The scintillation chambers make up a basic part for counting systems, such as:

• airborne ²²²Rn activity measurements
• ²²⁶Ra or ²²² Rn in water or other samples measurement

In the former case an air sample is taken from a tested atmosphere, in the latter case radon is transported from the sampling vessel into the scintillation chamber. The volume activity is determined from the results of alpha activity of radon and its short-lived decay products measurement.

Radon is sampled by aspiration into an evacuated scintillation detector DS 401 M (125 cm³ volume) or by fl ow pumping into detector DS 404 M (1000 cm³ volume)