The Distortion of Energy Deposit Distribution of <sup>12</sup>C Ions in Water

SONG Yushou(宋玉收); YAN Qiang(颜强); JING Tian(井田); XI Yinyin(席印印); LIU Huilan(刘辉兰)

doi:10.1088/1009-0630/14/7/22

Plasma Science and Technology > 2012 > 14(7): 665-669. > DOI: 10.1088/1009-0630/14/7/22

SONG Yushou(宋玉收), YAN Qiang(颜强), JING Tian(井田), XI Yinyin(席印印), LIU Huilan(刘辉兰). The Distortion of Energy Deposit Distribution of ¹²C Ions in Water[J]. Plasma Science and Technology, 2012, 14(7): 665-669. DOI: 10.1088/1009-0630/14/7/22

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The Distortion of Energy Deposit Distribution of ¹²C Ions in Water

College of nuclear science and technology, Harbin engineering university, Harbin 150001, China

Funds: Supported by the Fundamental Research Funds for the Central Universities (HEUCF101501) and the Fundamental Research Funds of Harbin Engineering University (002150260713)

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Received Date: May 16, 2011

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Abstract

Abstract

The transport process of 12C ions in water was studied with SRIM code and Geant4 toolkit. The SRIM results indicate that the transverse diffusion of 12C ion beam causes distortion of energy deposit along the beam direction. The distortion becomes more notable as the transverse diffusion increases. The simulation results of Geant4 indicate that the influence of secondary fragments on energy deposit distribution would be the main factor causing the distortion in higher energy range. In the region adjacent to the beam line where the contribution from 12C ions dominates, the contributions from secondary fragments are ignorable. The further from the beam axis the region locates, the larger the contributions from secondary fragments, until the contributions from secondary fragments exceed that of 12C. Among all the secondary fragments, the contributions of H, He and B ions are mostly notable. It is also found that some positron-emitting secondary fragments could be very useful for PET.
- ¹²C ions,
- simulation,
- secondary fragments,
- energy deposit distribution

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