Abstract:
The time decay of the pulsed thermal neutron flux has been measured with quasi-point SOF detectors (scintillator with the optical fiber). The detectors have been placed at three positions in a 12 cm cube of polyethylene. The time decay constants of the fundamental exponential mode of the thermal neutron flux have been determined and compared with results of a reference measurement using 3He neutron detectors at the cube surface and with a theoretical result from the thermal neutron diffusion theory.
