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Distribution of exit silicon ions over excited states after penetrating through carbon foils at 2.65, 4.3 and 6.0 MeV/u
https://repo.qst.go.jp/records/44838
https://repo.qst.go.jp/records/4483849c64bba-f46a-4fef-afba-3b11ce5b868f
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2007-05-02 | |||||
| タイトル | ||||||
| タイトル | Distribution of exit silicon ions over excited states after penetrating through carbon foils at 2.65, 4.3 and 6.0 MeV/u | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Miyoshi, Tomohiro
× Miyoshi, Tomohiro× Noda, Kouji× Tawara, H× Shevelko, Viatcheslava× et.al× 野田 耕司 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | New experimental data on the charge-state (q) evolution fractions Fq(D) and equilibrium charge-state fractions Fq-infinite are presented when 2.65 MeV/u C2+, O3+, Ne4+ and Si5+ projectile ions passed through carbon foils with thickness of D = 10–200 micro-g/cm2. The equilibrium fractions Fq-infinite for Si + C collisions (i.e. for silicon ions colliding with carbon foils) are compared with the data at 4.3 and 6.0 MeV/u previously reported, and the observed significant difference is explained by different energy dependencies of the electron-capture and projectile-ionization cross sections. Detailed information about nl-state distribution functions Nq(nl) of exit silicon ions is obtained for these three energies by solving linear balance equations for Nq(nl) values where n and l are the principal and orbital quantum numbers, respectively, and Sigma_nl[Nq(nl)] = Fq-infinite. The collision cross sections and radiative decay rates as the coefficients of these balance equations are calculated for each ion-beam energy. Based upon the present method, it is found that the fractions of excited Si ions after the carbon foil are about 57%, 33% and 15% at energies of 2.65, 4.3 and 6.0 MeV/u, respectively, clearly indicating the significant reduction of the excited-ion component with the collision energy increasing. The calculated equilibrium charge-state fractions F1qfor Si ions are in good agreement with available experimental data. |
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| 書誌情報 |
Nuclear Instruments & Methods in Physics Research Section B 巻 258, 号 2, p. 329-339, 発行日 2007-05 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0168-583X | |||||
