| タイトル | Fragmentation of 200 and 244 MEV/u Carbon Beams in Thick Tissue-Like Absorbers |
| 著者（英） | Skvarc, J.; Tretyakova, S. P.; Bamblevski, V. P.; Bimbot, R.; Sihver, L.; Wilson, J. W.; Ilic, R.; Schardt, D.; Golovchenko, A. N.; Tripathi, R. K. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1999-01-01
1999 |
| 言語 | eng |
| 内容記述 | Stacks consisting of thin CR-39 sheets sandwiched between thick lucite and water absorbers were perpendicularly bombarded by C-12 ions at 200 and 244 MeV/u. Track radius distributions representing the charge composition of the fragmented beams were automatically measured by a particle track analysis system. After analysis of the nuclear charge distributions, the total charge removal cross-sections and elemental production cross-sections of fragments with atomic numbers from 5 to 3, were obtained down to the lower energies (approx. 50 and 100 MeV/u, respectively). It has been found that the measured total charge removal cross-section agrees with theoretical predictions within approx. 10% and very well with previous experiments in corresponding energy regions. Two model calculations for production of B fragment are in good agreement with our measured data while a third model overestimates it by approx. 12%. Theoretical cross-sections for Be and Li fragments differ strongly among the different models and from measured values. |
| NASA分類 | Nuclear Physics |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/341553 |
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