Ludlum Model 43-9 Alpha Sample Counter Head F&J Specialty These have been carefully stored

These have been carefully stored in climate controlled storage

Detector Crystal: 1" x 2 mm Sodium Iodide

Normally this is used in a way that is designed to ignore the presence of Radon

37% 90Sr/90Y

DESCRIPTION: lead shielding/collimator for 6

Ludlum Model 43-9 Alpha Sample Counter Head F&J Specialty These have been carefully storedIndicated Use Sample counting Detector ZnS(Ag) scintillator Window 0. 4 mg cm2 Efficiency 230Th: 30% Typical Background (10 R hr) 3 cpm Photomultiplier Tube 3. 8 cm (1. 5 in.) diameter Operating Voltage 500 to 1200 V Sample Size (max.) 2. 54 cm (1 in.) dia. Sample Holder O ring sealed stainless steel slide Size (D x L) Detector: 7. 6 x 21. 6 cm (3 x 8. 5 in.) Sample Tray: 4. 6 x 14 cm (1. 8 x 5. 5 in.) Weight 0. 9 kg (2 lb)