Development of a Fission Neutron Spectrum from a D-T Neutron Generator by Spectrum Subtraction Technique.

Californium-252 (252Cf) is considered essential by the National Institute of Standards and Technology for the calibration of neutron instrumentation and dosimetry. Californium-252 has a relatively short half-life of 2.645 y; consequently, it must be replaced frequently to produce an adequate neutron flux for calibration.