BDEG4-40, BDEG4-41, BDEG4-42, BDEG4-43
Recommended
Scintillation Blocks Based on Thallium-Activated Sodium Iodide Monocrystals
Characteristics
Scintillator Diameter, mm
—
16-63
Scintillator Height, mm
—
16-100
Amplitude Resolution for Cs-137 Gamma Line, %, not more than
—
10-12
Base
—
CsI(Tl)
Type
—
BDEG-4
PMT Type
—
FEU-67B, FEU-85, FEU-118, FEU-139
BDEG4-40, BDEG4-41, BDEG4-42, BDEG4-43
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Scintillation Blocks Based on Thallium-Activated Cesium Iodide Monocrystals
CsI(Tl) monocrystals offer the following advantages:
- Non-hygroscopic (unlike NaI(Tl))
- Easy to machine
- Resistant to shocks, vibrations, and sudden temperature changes
- High transparency to their own radiation
- Effective for detecting gamma rays and heavy charged particles
These properties make them competitive with NaI(Tl) in geological and space research.
Key Physico-Chemical Properties of Scintillators Based on CsI(Tl) Monocrystals
| Parameter | Value |
|---|---|
| Density, g/cm³ | 4.51 |
| Effective atomic number | 54 |
| Melting temperature, °C | 621 |
| Refractive index | 1.84 |
| Decay time, µs | 0.7 |
| Light yield relative to NaI(Tl), % | 50 |
| Emission spectrum maximum, nm | 550 |
| Hygroscopicity | No |
Scintillation Blocks with Specifications
| Type of Scintillation Block | Base | PMT Type | Scintillator Dimensions, mm (diameter/height) | Amplitude Resolution for Cs-137 Gamma Line (662 keV), %, not more than |
|---|---|---|---|---|
| BDEG-4 | CsI(Tl) | FEU-67B | 16 × 16 16 × 25 16 × 40 | 12.0 |
| BDEG-4 | CsI(Tl) | FEU-85 | 25 × 25 25 × 40 | 10.0 |
| BDEG-4 | CsI(Tl) | FEU-118 | 40 × 40 40 × 63 | 10.5 |
| BDEG-4 | CsI(Tl) | FEU-139 | 63 × 63 63 × 100 | 11.0 12.0 |