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High Gamma Flux Fission Counter

High Gamma Flux Fission Counter

Optimum Performance

In all applications, the inherent low sensitivity (0.14 cps/nv in 0 R/hr) must be weighed against the advantage of satisfactory performance in a high gamma environment. Performance is greatly dependent on associated electronics when operating in this environment. The Reuter Stokes fission counter offered by GE incorporates smart construction and high count-rate electronics that result in optimum performance in a high gamma flux.

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Features

Our fission counter (RS-P6-0805-134) operates in high gamma flux application (less than 106 R/hr). Due to the high neutron-to-gamma signal ratio in these applications, the large fission pulses permit discrimination against gamma pulses and pulse pile-up. Our fission counter is constructed of aluminum alloy for minimum neutron absorption and residual activity. All seals are ceramic-to-metal and insulators are high-purity alumina.

Specifications

Mechanical
  • Maximum diameter: 2.62 cm
  • Maximum overall length: 20.3 cm
  • Connector type: HN
Material
  • Outer shell and inner electrodes: Aluminum
  • Connector: Aluminum
  • Insulation:
    — Detector: Alumina ceramic
    — Connector: Alumina ceramic
  • Neutron sensitive material: Uranium enriched 93% in U-235
  • Total quantity of U-235: 12 mg
  • Fill gas: 76 cm Hg – Argon/Nitrogen
Capacitance
  • 40 pf
Resistance @ 25°C
  • 1012 ohms (minimum)
Maximum Ratings
  • Voltage: 800 V
  • Temperature: 300°C
  • Burn-up life for 10% decrease in sensitivity: 2 x 1020 nvt (thermal)
Typical Operating Characteristics
  • Thermal neutron sensitivity (see note): 0.14 cps/nv ±20%
  • Thermal neutron flux range: to 106 nv
  • Voltage range: 300-800 Volts
  • Output pulse characteristics (average)
    — Charge output: 3 x 10-15 coulombs
    — Collection time: ≤200 nanoseconds

Note : The sensitivity is measured with alpha background count rate from uranium plating at <1 cps. Sensitivity values are not adjusted for perturbation.

Integral Bias Curve (Voltage 800 vdc) high-gamma-spec-1
Typical Connection Diagram high-gamma-spec-2

Contact Us

Contact TypeContact Information
Application Engineering Nathan Johnson
Tel: (330) 963-2330
Mobile: (330) 352-0754
E-mail: nathan.johnson@ge.com
Global Sales (Excluding Asia)
Carlton Green
Tel: 208 761 8532
Mobile: (208) 761-8532
E-mail: carlton.green@ge.com
Global Sales (Asia) Masaki Urushihara
Tel: 81-3-5544-3815
Mobile: 81-80-3080-7080
E-mail: masaki.urushihara@ge.com

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Descriptions English
Fission Counter in a High Gamma Flux Factsheet and Specifications acrobat-reader


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