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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.
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