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航空γ谱探测的Monte Carlo模拟对于实际航空探测工作的开展有重要的指导意义。采用多子源计算结果加权叠加的办法,计算了大地本底γ谱和埋藏于地层中不同深度的60Co在理想状况下各自对应的航空探测γ谱。计算结果表明:采用多子源加权叠加方法获得的模拟谱与实际航空探测相符较好。在理想状况下,放射性同位素60Co可被探测到的最低相对强度与埋藏深度之间存在半对数线性关系。这一线性关系为实际航空探测60Co时,探测工作条件的选择提供了理论参考。
Monte Carlo simulation of airborne γ-ray detection has important guiding significance for the development of actual airborne exploration. Using the method of weighted superposition of multi-source calculation results, the γ-spectrum of the ground background and the corresponding airborne detection γ-ray spectra of 60Co under different ideal conditions buried in the ground are calculated. The calculation results show that the simulated spectrum obtained by weighted superposition of multiple sub-sources is in good agreement with the actual airborne detection. Under ideal conditions, there is a semi-logarithmic linear relationship between the lowest relative intensity detectable by radioactive isotope 60Co and burial depth. This linear relationship provides a theoretical reference for the selection of working conditions for the detection of 60Co during the actual aviation exploration.