Forward calculation of airborne gamma 3D radiation fields based on rapid coupling method of point kernel integrals

Area of Science:

• Geophysics
• Environmental Science
• Radiation Physics

Background:

• Airborne gamma ray spectrum detection is crucial for measuring natural radionuclide distribution in environmental media.
• Understanding radiation information related to mineralization and dose distribution is vital for effective application.

Purpose of the Study:

• To develop a theoretical calculation model for the spatial radiation field of differential surface sources at the ground-air interface.
• To create a rapid calculation program for the 3D radiation field of irregular surface sources coupled with point sources.
• To assess the accuracy and efficiency of the developed program.

Main Methods:

• Discretizing geological bodies with radionuclides into differential surface sources.
• Deriving a theoretical model for ground-air interface gamma radiation fields.
• Developing a 3D radiation field calculation program using the Qt framework.

Main Results:

• The program demonstrated high accuracy and efficiency, being dozens of times faster than existing methods like SuperMC for irregular sources.
• Average relative deviations were within acceptable ranges for regular and irregular surface sources, though larger deviations were noted in edge regions and some irregular models.
• Tested against rectangular, circular, and irregular surface sources, the program showed good consistency and accuracy.

Conclusions:

• The developed rapid calculation program provides a valuable tool for airborne gamma radiation field analysis.
• This technology can enhance the exploration of mineralization-related radiation information and dose distribution laws.
• The study offers a theoretical reference for advancing airborne gamma radiation field technology.