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Charge exchange cross section for carbon clusters on several stripper gases in tandem accelerator

タンデム加速器ストリッパーガスに対する炭素クラスターの荷電変換断面積

齋藤 勇一; 千葉 敦也; 阿達 正浩; 鳴海 一雅

Saito, Yuichi; Chiba, Atsuya; Adachi, Masahiro; Narumi, Kazumasa

Measuring cluster ion beam transmission as a function of the target gas density at a charge exchange section in a tandem accelerator allows us to determine cross sections for collision-induced destruction and a charge exchange from a negative ion (q = -1) to a positive ion (q = +1). Using the TIARA 3MV tandem accelerator, we evaluated the cross sections for carbon cluster ions C$$_n$$(n=4, 8) in MeV energy regions on several gas targets (He, N$$_2$$, CO$$_2$$, SF$$_6$$). As a result, it was revealed that the destruction cross sections and the charge exchange cross sections for C$$_4$$ and C$$_8$$ were on the order of 10$$^{-15}$$ cm$$^2$$ and 10$$^{-16}$$ cm$$^2$$, and on the order of 10$$^{-14}$$ cm$$^2$$ and 10$$^{-16}$$ cm$$^2$$, respectively.

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