Abstract
Radical formation in solid alanine irradiated with H{sup +} and He{sup +} ions of 0.5-3.0 MeV and with heavy ions of hundreds of MeV was examined by the ESR method. Radical yield is constant below a critical fluence, and the yield decreases above the fluence. The critical fluence for the H{sup +} and He{sup +} ions is about 10{sup 12} ions cm{sup -2}, while the critical fluence for the heavy ions is 10{sup 10}-10{sup 11} ions cm{sup -2}. G-value of the radical formation (radicals per 100 eV absorbed dose) is obtained from the constant yield at the low fluences. The G-value depends on the radiation quality. This dependence is ascribed to the difference of local dose in the ion tracks. The fluence-yield curves were simulated with a model assuming cylindrical shape of ion tracks and dose-yield relationship for {gamma}-irradiation. This model well explains the fluence-yield curves for the ion irradiations. (author)
Koizumi, Hitoshi;
Ichikawa, Tsuneki;
Yoshida, Hiroshi;
[1]
Namba, Hideki;
Taguchi, Mitsumasa;
Kojima, Takuji
- Hokkaido Univ., Sapporo (Japan)
Citation Formats
Koizumi, Hitoshi, Ichikawa, Tsuneki, Yoshida, Hiroshi, Namba, Hideki, Taguchi, Mitsumasa, and Kojima, Takuji.
Effect of radiation quality on radical formation in ion-irradiated solid alanine.
Japan: N. p.,
1997.
Web.
Koizumi, Hitoshi, Ichikawa, Tsuneki, Yoshida, Hiroshi, Namba, Hideki, Taguchi, Mitsumasa, & Kojima, Takuji.
Effect of radiation quality on radical formation in ion-irradiated solid alanine.
Japan.
Koizumi, Hitoshi, Ichikawa, Tsuneki, Yoshida, Hiroshi, Namba, Hideki, Taguchi, Mitsumasa, and Kojima, Takuji.
1997.
"Effect of radiation quality on radical formation in ion-irradiated solid alanine."
Japan.
@misc{etde_588370,
title = {Effect of radiation quality on radical formation in ion-irradiated solid alanine}
author = {Koizumi, Hitoshi, Ichikawa, Tsuneki, Yoshida, Hiroshi, Namba, Hideki, Taguchi, Mitsumasa, and Kojima, Takuji}
abstractNote = {Radical formation in solid alanine irradiated with H{sup +} and He{sup +} ions of 0.5-3.0 MeV and with heavy ions of hundreds of MeV was examined by the ESR method. Radical yield is constant below a critical fluence, and the yield decreases above the fluence. The critical fluence for the H{sup +} and He{sup +} ions is about 10{sup 12} ions cm{sup -2}, while the critical fluence for the heavy ions is 10{sup 10}-10{sup 11} ions cm{sup -2}. G-value of the radical formation (radicals per 100 eV absorbed dose) is obtained from the constant yield at the low fluences. The G-value depends on the radiation quality. This dependence is ascribed to the difference of local dose in the ion tracks. The fluence-yield curves were simulated with a model assuming cylindrical shape of ion tracks and dose-yield relationship for {gamma}-irradiation. This model well explains the fluence-yield curves for the ion irradiations. (author)}
place = {Japan}
year = {1997}
month = {Mar}
}
title = {Effect of radiation quality on radical formation in ion-irradiated solid alanine}
author = {Koizumi, Hitoshi, Ichikawa, Tsuneki, Yoshida, Hiroshi, Namba, Hideki, Taguchi, Mitsumasa, and Kojima, Takuji}
abstractNote = {Radical formation in solid alanine irradiated with H{sup +} and He{sup +} ions of 0.5-3.0 MeV and with heavy ions of hundreds of MeV was examined by the ESR method. Radical yield is constant below a critical fluence, and the yield decreases above the fluence. The critical fluence for the H{sup +} and He{sup +} ions is about 10{sup 12} ions cm{sup -2}, while the critical fluence for the heavy ions is 10{sup 10}-10{sup 11} ions cm{sup -2}. G-value of the radical formation (radicals per 100 eV absorbed dose) is obtained from the constant yield at the low fluences. The G-value depends on the radiation quality. This dependence is ascribed to the difference of local dose in the ion tracks. The fluence-yield curves were simulated with a model assuming cylindrical shape of ion tracks and dose-yield relationship for {gamma}-irradiation. This model well explains the fluence-yield curves for the ion irradiations. (author)}
place = {Japan}
year = {1997}
month = {Mar}
}