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Model 43-143-1

Alpha-Beta Detector

Part Number: 47-4011

This 100 cm² gas flow proportional detector provides excellent alpha and beta efficiency. It is most commonly used at frisking stations where it can be fed a continuous supply of P-10 counting gas. The counting gas enters through the inlet port located at the bottom of the detector and exits through a pin-sized hole located at the top of the detector body.

Another feature of this light-weight design is the easy access to the metalized polyester window whenever it requires replacement. This is accomplished by simply sliding the front face cover off the detector body.

(Equivalent to Eberline HP-100)

Specifications

Indicated Use	Alpha-Beta survey
Detector Type	Gas proportional
Recommended Counting Gas	P-10 (10% methane, 90% argon) is recommended. Other counting gases are also acceptable.
Gas Flow	Counting gas enters through the inlet port (located at the bottom of the detector) and exhausts through a small pin-sized hole located at the top of the detector to ensure good gas flow across the volume. The gas flow rate is approximately 30 to 50 cc/min.
Window	Typically two layers of metalized polyester (0.8 mg/cm²). Other thicknesses available. Easy access for replacement by sliding the removable front cover off the detector body.
Window Area	Active: 100 cm² (15.5 in²) Open: 70 cm² (10.9 in²)
Efficiency (4π)	²³⁹Pu: 20% ¹⁴C: 15% ⁹⁹Tc: 30% ⁹⁰Sr/⁹⁰Y: 20% Gamma: < 1%
Simultaneous Alpha-Beta Counting	²³⁹Pu: 17.5% ⁹⁹Tc: 20% ⁹⁰Sr/⁹⁰Y: 20%
Typical Background (10 µR/hr field)	Alpha: ≤ 3 cpm when operating at alpha-only plateau region Beta-Gamma: ≤ 350 cpm
Operating Voltage	Alpha: 1100 to 1400 V (typical) Beta-Gamma: 1600 to 1800 V (typical)
Counter Threshold Setting	2 to 5 mV for scaler or gross counting instrument (typical)
Connector	MHV
Size (H x W x L)	8.4 x 11.9 x 15.5 cm (3.3 x 4.7 x 6.1 in) with handle
Weight	0.59 kg (1.3 lb)

Suggested Instruments

Model	Description	Part Number
Model 3002	Digital Survey Meter For alpha-beta counting Stores up to 1000 data points	48-4037
Model 12	Analog Survey Meter	48-1609
Model 16	Analog Survey Meter Adjustable window	48-1612
Model 18	Analog Survey Meter Adjustable window 3 detector setups	48-1613
Model 2000	Scaler Scaler Range: 0 to 999,999 counts Timer: 0 to 999 minutes	48-1648
Model 2200	Scaler-Ratemeter Scaler Range: 0 to 999,999 counts Ratemeter Range: 0 to 500,000 cpm Timer: 0 to 999 minutes Adjustable window	48-1651
Model 2221	Analog Scaler-Ratemeter with Digital LCD Single channel analysis	48-2065
Model 2224-1	Analog Scaler-Ratemeter with Digital LCD Simultaneous alpha-beta counting	48-2679
Model 2241-2	Digital Scaler-Ratemeter Auto-ranging RS-232 port 2 detector setups	48-2731
Model 2350-1	Digital Datalogging Meter Stores 1000 data points Supports 16 detector setups	48-2751
Model 2360	Analog Datalogging Meter with Digital Scaler LCD Simultaneous alpha-beta measurements Stores 550 data points	48-2872
Model 4906A	Alpha Hand & Foot Monitor	48-3687
Model 4906AB	Alpha-Beta Hand & Foot Monitor	48-3688
Model 4906P	Alpha-Beta-Gamma Hand & Foot Monitor	48-3919

Options

Option	Description	Part Number
Model 2750	Gas flow control box	48-2146
2-Stage Gas Regulator	Gas regulator	2310017
Model T-1031	Gas flow time control	48-2472