Energy disperse spectroscopy

Abstract

The invention relates to an energy disperse spectroscopy. The energy disperse spectroscopy is characterized by directly solving a control word corresponding to a numeric control gain amplifier according to a spectrum drift computational formula, outputting the control word by a serial port and finally realizing the aim of spectrum drift correction.

Description

technical field [0001] The invention relates to the field of physical exploration, in particular, the invention relates to an energy spectrometer. Background technique [0002] Aerial geophysical prospecting is a high-tech combination of geophysical prospecting technology and aviation technology. Its essence is to use aviation aircraft as a vehicle to load geophysical detection instruments to complete geophysical information collection in the air. It is a method to quickly acquire and It is a method for studying various geophysical field information (such as magnetic field, electromagnetic field, gravitational field, radioactive field) related to the earth's lithosphere, especially the crust. Aeronautical spectroscopy is an airborne geophysical method for obtaining information on the earth's radioactive field. Since the United States, Canada, the Soviet Union and other countries took the lead in carrying out aerial radioactivity measurement in the late 1940s, radioactive ae...

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Problems solved by technology

M. Matoba et al. used the flat window part of the natural energy spectrum and the highest energy end window part of the spectral line as the basis for stabilizing the spectrum, instead of the traditional method of using the characteristic peaks in the natural spectral line, and achieved certain results. However, the accuracy of spectrum stabilization is low, and it can only guarantee the stability of spectral lines within a certain range, and still cannot achieve high-precision spectral line stabilization; P.K. The control voltage is obtained by integrating the characteristic peaks, thereby changing the capacitance value of the varactor diode, and finally realizing the gain adjustment of the spectral line. This method does not need software control and is a pure hardware closed-loop control behavior, but it lacks flexibility and is difficult to adjust. It is not suitable for the application of multi-crystal stabilization of aviation energy spectrum; R.Martincic et al. used the light emitted by LEDs of special bands to excite NaI crystals, thereby forming characteristic peaks in the spectral lines, and using these characteristic peaks to stabilize the spectral lines; P. Ottonello et al. used the laser method to form characteristic peaks and stabilize the spectral lines; while the more conventional method is to use an external radioactive source to stabilize the spectral lines by searching for the characteristic peaks of the radioactive source.

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