German BERTHOLD LB 761 low background α, β counter
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Brief description:LB761 GD α-β Low Level Counter 200 mm Planchets Allows simultaneous measurement of α- and β-activity of samples in two separate measurement channels Background count rate is very low with the system LB761, so that good detection limits can be achieved
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Detailed introduction
germanyBERTHOLD LB 761 Low Background Alpha, Beta Counter
Product introduction:
l LB761 GD Alpha-Beta Low Level Counter 200mm Planchets
l Allows simultaneous measurementsα- and β-active samples in two separate measurement channels
l The background count rate is very low for systemsLB761, which enables good detection limits
Application areas:
l Environmental Laboratory
l health physics
l chemical radio
l Physics
l industrial safety
l 
Food and Drug Analysis
l Department of Nuclear Medicine
Technical parameters:
counter | LB 6307, sample tray | |
lead shield | processing, 10 cm thick, using 78 standard bricks, 4 bricks and 4 PI shields to reduce environmental radiation | |
weight | approx.800kg | |
Count gas | StandardP-10 gas (argon methane 90:10) | |
Working voltage | Measurement counter | 1300 V |
Mask counter | 1700 V | |
window | Hostaphan foil, aluminum steamed sides 0.4 mg/cm² | |
efficiency | 241Am | 18% |
90Sr/90Y | 46% | |
14C | 26% | |
background( 200mm tin plated disc) | alpha channel | approx.0.02 cps |
beta channel | approx. 0.15 cps | |
overflow | β - α channel | <0.01, α-counts per 1000 β-counts |
ofα-β-channel | According to the self-absorption of different nuclide sources. polonium-210 2% typical | |
Counting chamber dimensions | 270 x 600 x 600 mm³ (H x W x L) | |
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