The simulation and measurement data of the energy correlations between two 252Cf prompt fission neutrons.

This data includes simulation and experimental data. The simulation data comprises the input data required for constructing the simulation system, the simulation process, and presents the simulation results. The experimental data provides the neutron time-of-flight (TOF) spectra measured by each EJ309 liquid scintillation detector, as well as the measured correlated neutron events and the measured energy correlation data.