20th Century Electronics Ltd 40EB70/50/G BF₃ proportional counter (Neutron Detector)
Détecteur proportionnel d'ionisation à gaz (détecteur de neutrons)
Bortrifluorid-Zählrohre (Neutronendetektor)

For the detection of slow neutrons in the energy range below 0.5 eV. Neutrons always produce secondary gamma-rays by interacting either with detector materials or with surrounding materials. In the BF₃ proportional counter, BF₃ gas acts as both a proportional gas and a neutron detection material.

This neutron detector was produced by 20th Century Electronics in England. The company began manufacturing BF₃ counters in the early 1950s.

In the model number "40EB70/50/G," the EB refers to "enriched boron trifluoride" (the BF₃ is enriched in ¹⁰B); the 50 refers to the tube diameter in mm.

Nominal efficiency of 73 counts s^-1 (unit thermal neutron flux)^-1.

 

Click to enlarge

Longueur • Length • Länge : 58,5 cm • 23"
Diamètre • Diameter • Durchmesser : 51 mm • 2"

 

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