BF3 Proportional Counters info.
BF3 Neutron Proportional Counters
Boron trifluoride
(BF3) Neutron Proportional Counters are sensitive
to thermal neutrons, but are less sensitive to gamma radiation than Helium-3
(3He) counters. Centronic BF3
Neutron Proportional Counters are typically used for thermal neutron diffraction,
spectroscopy, industrial gauging, mixed waste monitoring and soil moisture
detection.
Selection from product range – summary of parameters
CENTRONIC PART NUMBER |
BF3 GAS
PRESSURE, SENSITIVITY AND OPERATING VOLTAGE |
||||||
20cm Hg (XX=20) |
40cm Hg (XX=40) |
70cm Hg (XX=70) |
|||||
Replace the XX in each part number with the number specified under BF3 Gas Pressure |
ACTIVE LENGTH (mm) |
SENSITIVITY (cps/nv) |
OPERATING VOLTAGE (Volts) |
SENSITIVITY (cps/nv) |
OPERATING VOLTAGE (Volts) |
SENSITIVITY (cps/nv) |
OPERATING VOLTAGE (Volts) |
| 13mm Diameter Tubes | |||||||
| 5EB/XX/13M | 50 |
0.15 |
1200 |
0.3 |
1300 |
0.53 |
1800 |
| 25mm Diameter Tubes | |||||||
| 13.5EB/XX/25M | 135 |
1.5 |
1300 |
3.0 |
1800 |
5.0 |
2400 |
| 15EB/XX/25M | 150 |
1.8 |
1300 |
3.5 |
1800 |
5.9 |
2400 |
| 31EB/XX/25M | 310 |
3.9 |
1300 |
7.4 |
1800 |
12.5 |
2400 |
| 50EB/XX/25M | 500 |
6.0 |
1300 |
12 |
1800 |
20 |
2400 |
| 100EB/XX/25M | 1000 |
12 |
1300 |
23 |
1800 |
39 |
2400 |
| 125EB/XX25M | 1250 |
15 |
1300 |
29 |
1800 |
49 |
2400 |
| 50mm Diameter Tubes | |||||||
| 15EB/XX/50M | 150 |
7 |
1900 |
13 |
2800 |
22 |
3600 |
| 25EB/XX/50M | 250 |
12 |
1900 |
22 |
2800 |
36 |
3600 |
| 50EB/XX/50M | 500 |
23 |
1900 |
44 |
2800 |
72 |
3600 |
| 107EB/XX/50M | 1070 |
53 |
1900 |
102 |
2800 |
169 |
3600 |
All detectors available in Aluminium, Copper or Stainless Steel construction. HN connectors are fitted as standard. Other connectors are available.
Footnote
The above is a representative range of product.
Relative characteristics of 3He and BF3 Neutron Proportional Counters
1. Boron has a lower neutron cross section (3840 Barns) compared with
He-3 (5330 Barns), therefore Boron Counters are less sensitive to neutrons
than their Helium counterparts.
2. The energy released per reaction is higher in ¹°B than 3He
which enables BF3 counters to discriminate against
gamma pulses.
3. BF3 counters function at much higher voltages
than 3He counters (1-4kV).
Due to our policy of continued development, specifications are subject
to change without notice.