Calculate the expected efficiency of the detector for thermal neutrons of 25meV.
The specifications of the BF3 detectors employed in this experiment as follows:
Manufacturer N. Wood Counter Laboratory
Model M-1
Diameter 1"
Active Length 12.25"
Operating Voltage 1100 to 1500 volts
BF3 Pressure 40 cm of Hg.
90% Enriched B-10