ENVINET a.s.

NaI(Tl) Crystal Scintillators, SKG and SKW Models

Thallium activated sodium iodide crystals are the most frequently used scintillators designed for the detection of gamma radiation.

In addition to their primary application, i.e., gamma radiation detection and spectrometry, these scintillators are also used for the detection of soft x-radiation. Due to their high light output, high detection effi ciency, and good energy resolution, these scintillators are extensively used in biology, medicine, geology, industrial radionuclide applications, environmental monitoring etc.

Sodium iodide crystals are manufactured from a raw melt by the use of a careful and accurately controlled growing technique. Cultivated ingots are machined to obtain standard dimensions. Due to the high hygroscopicity of sodium iodide, crystals are hermetically encapsulated. Luminescent light output is ensured by the front glass window optically coupled to the crystal. The remaining parts of the crystal are covered with refl ective layer.

Nal(TI) crystal of type SKG

Nal(TI) crystal of type SKW

Technical Data:

Scintillation Crystal Flanges

The flanges are used to fix the unified-series scintillators into the scintillation probes. In accordance with international recommendations, housing of the new models of NaI(Tl) scintillators are not provided with the f xed flanges. The scintillator housing is fitted with a groove for fixing of a flange ring. Due to this arrangement, scintillator can be connected to the probe by several methods so that the unified series scintillators can be used with the probes of various sizes. The flange for small scintillators of diameter up to 63 mm consists of two annular parts. The lock, which connects both flange halves, ensures a mutual overlapping of the connecting point so that the light penetration under the fl ange is prevented. Both flange halves are held together by a spring surrounding the flange. A sealing rubber ring is a part of the flange.