Several Techniques on Increasing Computation Efficiency of Photon Energy Deposition
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Graphical Abstract
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Abstract
F6 and *F8 are two methods to calculate energy deposition of photon by MCNP program. If the dimension of grid is almost the same long as the range of secondary electron， the precision of *F8 is higher than that of F6， but the efficiency of F6 is greatly higher than that of *F8. This paper presents five techniques to increase the efficiency，namely: F6 is use to the model with grid dimension bigger than 10 ranges of secondary electron; combination of F6 and *F8; change the substeps of electron; turn off knock on electron; selfadaption cutoff secondary electron. The two techniques， combination of F6 and *F8，selfadaption cutoff secondary electron， can provide a good precision and efficiency.
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