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Objective. Although in heavy-ion therapy, the quantum molecular dynamics (QMD) model is one of the most fundamental physics models providing an accurate daughter-ion production yield in the final state, there are still non-negligible differences with the experimental results. The aim of this study is to improve fragment production in water phantoms by developing a more accurate QMD model in Geant4. Approach. A QMD model was developed by implementing modern Skyrme interaction parameter sets, as well as by incorporating with an ad hoc α-cluster model in the initial nuclear state. Two adjusting parameters were selected that can significantly affect the fragment productions in the QMD model: the radius to discriminate a cluster to which nucleons belong after the nucleus-nucleus reaction, denoted by R, and the squared standard deviation of the Gaussian packet, denoted by L. Squared Mahalanobis’s distance of fragment yields and angular distributions with 1, 2, and the higher atomic number
FragmentationHadron-therapyMulti-objective-optimizationUantum-molecular-dynamicsAccelerator and our detectors, this can be used and is being used to make machines to treat cancer with hadron therapy. it has been built to meet stringent requirements and that can increase efficiency. don t forget the world wide web which was created so scientists can share information and now everybody uses that to share all sorts of information. blue sky research like this benefits everybody in ways you cannot really imagine at the start, which is so unexpected and so far reaching as well. which is so unexpected and so far-reaching as well. which is so unexpected and so far-reaching as well. today when it is switched far-reaching as well. today when it is switched on, far-reaching as well. today when it is switched on, is far-reaching as well. today when it is switched on, is there far-reaching as well. today when it is switched on, is there a far-reaching as well. today when it is switched on, is there a big i is switched on, is there a big button to switch it on and ce
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