A Neutron Detector Having Uniform Sensitivity from 10 Kev to 3 Mev

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Abstract
A neutron detector having approximately uniform sensitivity from 10-kev neutron energy to 3-Mev energy is described. The arrangement, known as a long counter, consists of a paraffin cylinder about 10″ outer diameter ×12″ long surrounding a long boron trifluoride proportional counter. Sensitivity curves are given for two of the best arrangements. The response is flat over the above range to about 10 percent.