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Vicinage effect on the yield of convoy electrons emitted from thin carbon foil induced by the penetration of 3.5 MeV/atom C$$_{n}$$$$^{+}$$ ions

Shiina, Yoko*; Kinoshita, Ryo*; Funada, Shuhei*; Matsuda, Makoto  ; Imai, Makoto*; Kawatsura, Kiyoshi*; Sataka, Masao*; Sasa, Kimikazu*; Kaneko, Toshiaki*; Tomita, Shigeo*

We investigated the target thickness dependence of convoy electron yields resulting from bombardments with 3.5 MeV/atom C$$_{n}$$$$^{+}$$ (n = 1 - 3) cluster ions. We observed that for bombardments with C$$_{2}$$$$^{+}$$ and C$$_{3}$$$$^{+}$$ ions, the convoy electron yield per atom, Y$$_{n}$$/n, reaches a maximum around 3-5 $$mu$$g/cm$$^{2}$$ and decreases with increasing target thickness from 3.1 to 10.5 $$mu$$g/cm$$^{2}$$, and ultimately reaches an asymptotic value. This asymptotic value of the convoy electron yield was nearly proportional to the size of the cluster n, that is, Y$$_{n}$$ $$propto$$ n$$^{2}$$, consistent with previous observations. We found that the escape length of the convoy electrons for C$$_{3}$$$$^{+}$$ and C$$_{2}$$$$^{+}$$ is much longer than that of C$$^{+}$$ bombardment. The present result suggests that the enhancement of the escape length could be the origin of this vicinage effect (i.e., Y$$_{n}$$ $$>$$ nY$$_{1}$$) on the convoy electron yield.

Language

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English

Journal

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Physical Review A

Volume

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110

Number

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6

Pages

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p.062826_1 - 062826_7

Publication Year/Month

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2024/12

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Paper URL

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https://doi.org/10.1103/PhysRevA.110.062826

DOI for research data

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Link to research data related to this paper/report.

Keywords

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Cluster effect; Secondary electron; Cluster Ions; Convoy electrons

Research Facility

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タンデム加速器  

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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立教大学; 岡山大学; 筑波大学

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- Accesses

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Category:Optics

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