Scintillation detectors are used to register and analyze gamma-radiation in energy range from 20 keV to 3 MeV when irradiated with a radioactive source. The detector consists of scintillator crystal optically connected to a photomultiplier tube, wrapped in an antimagnetic screen and placed in a sealed aluminum case. Depending on customer requirements, scintillation detectors can be based on different crystal materials, such as NaI (Tl), CeBr3, LaBr3, SrI or others.
| Material | Dimensions*, mm | Energy resolution at 662 keV, % | Energy range | Registration efficiency**, % | Advantages |
|---|---|---|---|---|---|
| NaI(Tl) | 51x51 63x63 76x76 150x100 | <7 <7.5 <8 <12 | 20 keV - 3 MeV | 0.65 1.2 2 7.5 | Low price |
| LaBr3(Ce) | 51x51 63x63 76x76 | <3.1 <3.3 <3.5 | 20 keV - 3 MeV | 1 1.5 2.5 | High resolution |
| CeBr3 | 25x25 38x38 51x51 | <4.2 <4.3 <4.3 | 20 keV - 3 MeV | 0.14 0.4 1 | High resolution, Low background and MDA |
| SrI2 | 25x25 38x38 | <2.8 <2.9 | 20 keV - 3 MeV | 0.14 0.4 | Low background and MDA |
| * - dimensions for reference only. Choice is not limited to the list. | |||||
| ** - at 662 keV by a point-like Cs-137 source at a distance of 5 cm from the detector’s top |
