The spectral response and application research of aviation gamma spectroscopy measurement system is a complex and important field, involving multiple aspects such as nuclear science and technology, geological exploration, environmental monitoring, etc. The following is a detailed exploration of this field:

1、 Overview of Aviation Gamma Spectroscopy Measurement System

The aviation gamma spectrum measurement system is mainly composed of gamma spectrometers, navigators, altimeters and other equipment with corresponding detection efficiency, as well as matching method technology software. This system is installed on aircraft and measures the gamma rays emitted by surface media and radioactive substances in the atmosphere during flight. By analyzing and measuring spectra, this system can achieve tasks such as geological exploration and radiation environment monitoring.

2、 Key Technologies for Spectral Response

Spectral response is the technical key to calibrating nuclear radiation related parameters such as efficiency, radioactive element (nuclide) content, and radiation dose in aviation gamma spectroscopy measurement systems. Although China has established a complete physical calibration model for the aviation gamma spectrum measurement system of natural radioactive nuclides, due to radiation safety, high cost, and short half-life, an effective calibration device for artificial radioactive nuclides has not yet been formed. At present, the main solution to the calibration problem of artificial radioactive isotopes is through numerical calculation methods, and these numerical calculation methods are mostly based on the gamma field theory of point detectors, without fully considering the geometric shape and material effects of the aviation gamma spectrometer itself.

3、 Analysis of spectral response characteristics

The spectral response characteristics of aviation gamma spectroscopy measurement systems are influenced by various factors, including cosmic rays, instrument background, atmospheric radon daughters, natural radioactive isotopes in the surface layer, and gamma radiation sources of artificial radioactive isotopes. A detailed analysis of the impact of these factors on system response can provide theoretical support for the application of airborne gamma spectroscopy measurement technology in geological exploration and environmental radiation measurement.

4、 Simulation models and methods

In order to more accurately simulate the spectral response of aviation gamma spectroscopy measurement systems, researchers have established various simulation models. For example, a spherical shell simulation model and a combination simulation model based on infinite multi-source particle Monte Carlo simulation. These models each have advantages in simulation accuracy and computational efficiency, and can better simulate complex situations in actual measurements.

5、 Application instance

The airborne gamma spectroscopy measurement system plays an important role in geological exploration and radiation environment monitoring. For example, in nuclear accident emergency response, the system can quickly and accurately measure the level of radioactive contamination, providing important basis for emergency decision-making. In addition, the system is widely used in areas such as lithological geological mapping, hydrogeological problem solving, and environmental monitoring.

6、 Research Outlook

In the future, with the continuous development of nuclear science and technology, the spectral response and application research of aviation gamma spectroscopy measurement systems will continue to deepen. On the one hand, it is necessary to further improve the calibration devices and numerical calculation methods for artificial radioactive isotopes; On the other hand, it is necessary to strengthen the study of system response characteristics under different geological and environmental conditions to improve the measurement accuracy and reliability of the system.

The spectral response and application research of aviation gamma spectroscopy measurement system is a complex issue involving multiple disciplines and fields. By conducting in-depth analysis of system response characteristics, establishing accurate simulation models, and conducting extensive application research, the measurement accuracy and reliability of the system can be continuously improved, providing more powerful technical support for geological exploration, radiation environment monitoring, and other fields.