| Autor: |
Wataru Iwazaki, Ken-ichi Takeda, Takuya Suguri, Chizuko Sakurai, Shuhei Numazawa, Isamu Arano, Hiroshi Kudo, Seiji Seki |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 207:283-290 |
| ISSN: |
0168-583X |
| DOI: |
10.1016/s0168-583x(03)00673-6 |
| Popis: |
We have measured energy spectra of electrons emitted in a backward direction of Si and Ge crystals while bombarded by 2.5 and 3.5 MeV/u C4+, C6+, O5+ and O8+. Under 〈1 1 0〉 channeling incidence conditions, the loss electron yield from the partially stripped ions is appreciably reduced (by a factor of 0.5–0.6 for C4+) relative to the non-channeling case. This reduction can be directly related to the reduced charge states of the channeled ions in the crystals. Furthermore, the evolution of the pre-equilibrium charge states of the incident ions has been deduced from a comparison of the effective nuclear charges for the loss electron yield, the low-energy electron yield, and the binary-encounter electron yield reported previously. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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