Alpha Beta Gamma Detector - Model 43-68
Specifications
INDICATED USE: alpha beta survey
DETECTOR TYPE: rechargeable gas proportional
RECOMMENDED COUNTING GAS: P-10 (10% methane, 90% argon)
GAS RECHARGE: will operate on static charge for at least 15 hours with 1 m (39 in.) cable; 5-hour static charge if connected to a simultaneous alpha/beta measuring instrument
WINDOW: 0.8 mg/cm² aluminized Mylar (other thicknesses available)
WINDOW AREA: 126 cm² (19.5 in²) active, 100 cm² (15.6 in²) open
EFFICIENCY (4Ï€): 20%-239Pu; 15%-14C; 30%-99Tc; 30%-90Sr/90Y less than 1%-gamma
SIMULTANEOUS ALPHA/BETA COUNTING: 17.5%-239Pu; 20%-99Tc; 20%90Sr/90Y
BACKGROUND:
alpha: < 3 cpm (when operating at alpha-only plateau region)
beta-gamma: typically 350 cpm (10 μR/hr field)
OPERATING VOLTAGE:
alpha: typically 1100-1400 volts
beta-gamma: typically 1600-1800 volts
COUNTER THRESHOLD SETTING: typically 2-5 mV
GAS CONNECTORS: double-end quick disconnect
SIZE: 10 x 11.7 x 19.8 cm (3.9 x 4.6 x 7.8 in.) (H x W x L), with handle
WEIGHT:0.9 kg (2 lb)
Model 43-68 Probe Gas Accessories
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LMI P/N
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Quantity
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Description
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2310017
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1
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2-stage Regulator
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13-7836
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1
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Regulator Output Fitting (1/4 in. FPT to ¼ in. tube)
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22-9689
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3
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Plastic Fitting Nuts for ¼ in. vinyl tubing
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22-9522
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2
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Fittings for Flowmeter (1/8 in. MPT to ¼ in. tubing)
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21-9547
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1
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10 to 100 cc Flowmeter (1/8 in. MPT to 1/4 in. tubing)
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22-9514
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AR
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x feet ¼ in. OD Vinyl Tubing for Gas Supply
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Â
