60 results about "Neutron activation" patented technology

The invention relates to a transmission type cement raw material on-line neutron activated sulfur alkali ratio analysis device and an analysis method. A measuring device is a gamma detector fixed between an upper belt and a lower belt, a neutron source is placed above the upper belt and above a cement raw material, neutrons are downwards irradiated on the cement raw material on the belt to generate action with nucleus in the cement raw material, the gamma detector transforms the received ray into a pulse signal and transmits the pulse signal to a multi-channel energy spectrum analyzer to be processed, the multi-channel energy spectrum analyzer uploads effective information to an upper computer, and the upper computer calculates the sulfur alkali ratio of the cement raw material according to the corresponding formula. The sulfur alkali ratio finally obtained by calculation is a ratio relation between SO3 content and the sum of K2O content and Na2O content, so the sulfur alkali ratio is not influenced by the total amount of the cement raw material on the belt; the overall shielding protection of the instrument adopts a two-layer structure, the inner layer is lead and the outer layer is polyethylene, so the use amount of the lead is reduced, and the cost and the weight of the instrument are reduced; and a detector shielding body adopts a two-layer structure, the outer layer is polyethylene and the inner layer is a cadmium plate, so the influence on the gamma detector by the neutrons is minimized, and the analysis precision of the instrument is improved.

The invention discloses a peak position similarity energy spectrum searching method for neutron activation element analysis. According to the peak position similarity energy spectrum searching method, files in a spectral form knowledge base are numbered, and index files are established according to peak position information, wherein each index file is a binary number with the number of digits equal to the number of spectral forms; according to the peak position information of an actually measured spectral form, corresponding Boolean operation is conducted on the index files, and a spectral form meeting a searching requirement is obtained from the spectral form knowledge base. By the adoption of the peak position similarity energy spectrum searching method, the spectral form with the peak position similar to that of the actually measured spectral form can be rapidly and accurately found from the spectral form knowledge base, and especially when the number of the spectral form files in the spectral form knowledge base is large enough and far larger than the total number of channels of the spectral form files, the peak position similarity energy spectrum searching method has remarkable advantages.