Energy loss and straggling of MeV Si ions in gases

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• 作者：C. Vockenhuber^a ; ^{vockenhuber@phys.ethz.ch} ; K. Arstila^b ; J. Jensen^c ; J. Julin^b ; H. Kettunen^b ; M. Laitinen^b ; M. Rossi^b ; T. Sajavaara^b ; M. Thö ; ni^a ; H.J. Whitlow^d ; ¹
• 关键词：Energy loss ; Energy-loss straggling ; Charge exchange
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：391
• 期：Complete
• 页码：20-26
• 全文大小：1067 K
• 卷排序：391

文摘

We present measurements of energy loss and straggling of Si ions in gases. An energy range from 0.5 to 12 MeV/u was covered using the 6 MV EN tandem accelerator at ETH Zurich, Switzerland, and the K130 cyclotron accelerator facility at the University of Jyväskylä, Finland. Our energy-loss data compare well with calculation based on the SRIM and PASS code. The new straggling measurements support a pronounced peak in He gas at around 4 MeV/u predicted by recent theoretical calculations. The straggling curve structure in the other gases (N2, Ne, Ar, Kr) is relatively flat in the covered energy range. Although there is a general agreement between the straggling data and the theoretical calculations, the experimental uncertainties are too large to confirm or exclude the predicted weak multi-peak structure in the energy-loss straggling.