闪光照相中FXRMC和MCNP4B的散射比较研究
Scattering comparison between FXRMC and MCNP in flash X-ray radiography
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摘要: 散射问题是高能辐射成像研究中的一个重要问题，采用蒙特卡罗模拟来确定散射对提取客体信息的影响是一种重要的研究手段。简单介绍了FXRMC和MCNP4B程序的特点及其记录方式；在确保相同输入参数的条件下，针对不同的照相模型进行了对比计算。结果表明两个程序计算的散射照射量相对差别小于5%，说明这两个程序具有较高的符合程度。通过与实验结果的比较发现，这两个程序模拟的散射分布与实验结果基本一致，均可用于高能闪光照相的模拟研究。还给出了在散射检验方面的一些建议。Abstract: Scattering is a most important factor in determining the object information in high energy X-ray radiography. The characteristics and tally methods of FXRMC and MCNP are given. Several high energy X-ray radiography systems are simulated with FXRMC and MCNP using the same X-ray source parameters. It is shown that the relative difference of the scatterings simulated by FXRMC and MCNP is within 5%. The FXRMC and MCNP scattering exposure distributions agree well with the experimental result for the aluminum cone radiography. Therefore, both FXRMC and MCNP can be used to simulate the scattering of high energy X-ray radiography. Suggests are also given to verify the results of Monte Carlo simulation.
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Key words:
- radiography /
- mcnp4b /
- fxrmc /
- scattering /
- comparison
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