Shielded Well Gamma Sample Counter Head
Model 243
Shielded Well Gamma Sample Counter Head
The Model 243, along with a pulse height analyzer system, is used for gamma ray assay and wipe test analysis. The Model 243 is shielded with 1.3 cm (0.5 in.) of lead to improve sensitivity by reducing background and other external radiation. The detector is an integrated 4.5 x 5.1 cm (1.8 x 2 in.) (Dia x thickness) NaI (Tl) crystal scintillator optically coupled to a 5.1 cm (2 in.) diameter, 10-stage photomultiplier tube.
| Indicated Use | Gamma assay |
|---|---|
| Detector (D x L) | Integral NaI(Tl) well scintillator 4.5 cm (1.8 in.) dia. x 5.1 cm (2 in.) thick |
| Well (D x L) | 1.7 x 3.9 cm (0.67 x 1.6 in.) |
| Efficiency | 125I: 80% 99mTc: 90% 137C: 33% 60Co: 43% |
| Sensitivity | Will detect 0.005 µCi gamma or 200 dpm removable contamination for 99Tc, 131I, 201Tl, 111In, 125I, 137Cs, and 67Ga |
| Background | ≤ 1000 cpm in a 10 µR/hr field (optional 1.3 cm [0.5 in.] lead sleeve for background reduction: Part No. 7379-044) |
| Photomultiplier Tube | 5.1 cm (2 in.) diameter |
| Operating Voltage | 500 to 1200 V |
| Construction | 1.3 cm (0.5 in.) thick painted lead wall and removable cap |
| Size | Base (W x L): 20.3 x 20.3 cm (8 x 8 in.) Body (D x H): 8.9 x 27.9 cm (3.5 x 11 in.) |
| Weight | 18.1 kg (40 lb) |
| Shipping Weight | 20.4 kg (45 lb) |
| SKU | 144134 |
|---|---|
| MFR Number | 7,160.00 |
| Manufacturer | LUDLUM MEASUREMENTS INC. |
| UOM | EA |
