Device for measuring neutron flux

The disclosed device comprises a gamma ray-compensated ionization chamber for producing a first output current caused from the irradiation with a neutron flux and gamma rays and a second output current substantially caused from the gamma rays alone. The second output current is amplified by an adjustable gain current amplifier having a wide dynamic range and then the second output current amplified is substracted from the first output current. The difference current provides a measure of the neutron flux. The amplifier has its amplification factor adjusted so as to increase the gamma compensation effect. (auth)