量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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We have measured the fragmentation cross sections of 56Fe on Al, C and CH2 targets at 471 A MeV using CR-39 plastic nuclear track detector. Cross sections for H target are calculated based on the results of C and CH2 targets. Here, we present the results of total charge changing cross sections and the partial cross sections for fragments with charge ZF ≥ 5. The total charge changing cross sections agree well with other previous experimental results at different energies and the theoretical prediction of Bradt–Peters semi-empirical formula, which are approximately independent of the beam energy but increase with the increase of the target mass. The partial cross sections show a significant enhancement for the fragments with even-Z nuclei, especially for the fragments with charge 10 ≤ ZF ≤ 20. For the collisions of 56Fe on all targets reported in this paper, we firstly present the partial cross section results of the fragments with charge 5 ≤ ZF ≤ 9 using CR-39 detector. Finally, the partial cross sections is compared with the prediction of the improved quantum molecular dynamical model (ImQMD) and the GEMINI model, the production of charged projectile fragments can be well described by the models.
Fragmentation cross section of 56Fe at 471 A MeV on Al, C and CH2 targets
