4 results about "Gamma ray spectrometer" patented technology

The present invention proposes a soil nutrient detection method based on gamma ray spectroscopy and an XGboost algorithm. The method comprises: constructing a training sample for soil nutrient detection, wherein the training sample comprises radioactive element data, and the label of the training sample is soil nutrient data of the same soil point as the radioactive element data; inputting the training sample into an XGboost model, wherein the XGboost model extracts features of the training sample and predicts soil nutrients of the training sample as nutrient prediction values; constructing a loss function based on the nutrient prediction values ​​and the labels of the training samples to train the XGboost model, thereby obtaining a soil nutrient detection model; and collecting soil radioactive elements of the soil to be tested using a gamma ray spectrometer, and inputting the collected radioactive elements into the soil nutrient detection model, thereby obtaining nutrient detection results of the soil to be tested.

The application discloses a system for detecting element content in concrete by using a neutron tube, which comprises an integrated radiation detection device, a bearing frame, a foldable cantilever and a device bearing vehicle, wherein the device bearing vehicle is connected with the bearing frame through the foldable cantilever, and the integrated radiation detection device is located in the bearing frame, wherein the integrated radiation detection device comprises a DD neutron generator and a gamma ray spectrometer, and the gamma ray spectrometer is connected with the DD neutron generator, and the system can detect the element content in concrete by using the neutron tube.

Disclosed herein are methods and system for determining an elemental composition of a downhole formation using neutron-induced gamma ray spectroscopy and doping the borehole fluid with a neutron absorber to remove at least part of the borehole thermal neutron flux before it can capture borehole nuclei and emit gamma rays within a spectral range of interest. For example, a method for determining the elemental composition includes adding a dopant to a borehole fluid, wherein the dopant absorbs thermal neutrons in the borehole, lowering a logging tool comprising a gamma ray spectrometer, emitting neutrons into a downhole environment, generating neutron-induced gamma rays comprising borehole gamma rays and formation gamma rays, detecting gamma rays from the downhole formation, and extracting the elemental composition of the downhole formation. The dopant may not emit gamma rays above 0.5 MeV or their peaks background should be predictable and / or consistent to be removed during data processing.

Disclosed herein are methods and system for determining an elemental composition of a downhole formation using neutron-induced gamma ray spectroscopy and doping the borehole fluid with a neutron absorber to remove at least part of the borehole thermal neutron flux before it can capture borehole nuclei and emit gamma rays within a spectral range of interest. For example, a method for determining the elemental composition includes adding a dopant to a borehole fluid, wherein the dopant absorbs thermal neutrons in the borehole, lowering a logging tool comprising a gamma ray spectrometer, emitting neutrons into a downhole environment, generating neutron-induced gamma rays comprising borehole gamma rays and formation gamma rays, detecting gamma rays from the downhole formation, and extracting the elemental composition of the downhole formation. The dopant may not emit gamma rays above 0.5 MeV or their peaks background should be predictable and / or consistent to be removed during data processing.