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Rad Man Minerals

Ludlum Model 44-21 Beta/Gamma Scintillator Probe

Ludlum Model 44-21 Beta/Gamma Scintillator Probe

Regular price $200.00 USD
Regular price Sale price $200.00 USD
Sale Sold out

A used, but functional Ludlum 44-21 Beta/Gamma Scintillator Probe. This probe is fully functional, though there does appear to be some minor damage to the mylar on the end of the probe, so that probably has to be replaced. I've been using it mostly with a plastic cap on the end, but due to getting other probes now this one is just sitting in my equipment box mostly.

Info from Ludlum:

Indicated Use Beta; Low-energy gamma detection
Detector Type NaI(Tl) scintillator, 2.54 cm (1 in) dia. x 0.1 cm (0.04 in) thick, adhered to plastic scintillator, 0.03 cm (0.01 in) thick 
Window 3.4 mg/cm2
Window Area Active: 5.1 cm2 (0.8 in2)
Open: 5.1 cm2 (0.8 in2)
Efficiency (4π) 14C: 4%
32P: 28%
125I: 38%
129I: 19%
Typical Background
(10 µR/hr field)
450 cpm
Non-Uniformity < 10%
Photomultiplier Tube 3.8 cm (1.5 in) diameter
Operating Voltage 500 to 1200 V (typical)
Connector Series "C" (others available)
Construction Aluminum housing with beige powder coat
Size (D x L) 5.1 x 18.5 cm (2 x 7.3 in) with connector cap
Weight 0.5 kg (1 lb)
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