Method for measuring spectrum and accumulated dose of neutrons by utilizing passive detector

The present invention relates to a method for passive neutron spectrum measured by using a detector and the cumulative dose, the method uses the measurement of radiation dose neutron moderator field probe, while processing the data, based on neutrons incident on the respective detector experienced moderator different radio access distances calculated neutron energy, then the count measured by the detector into respective neutron fluence accumulation, using software solutions spectrum obtained actual fluence incident neutron energy spectrum, depending on the incident neutron last The actual accumulated dose fluence neutron spectrum calculation. Measuring method of the present method does not require measurement of the power supply, adaptable to the environment, low cost, easy to use, while using energy information acquisition method of the present invention is capable of neutrons, uncertainty of measurement results is much better conventional passive neutron measurement method will be widely used in neutron dose monitoring of nuclear emergency and the environment.