| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10732074 | Radiation Physics and Chemistry | 2011 | 5 Pages |
Abstract
Aqueous coumarin-3-carboxylic acid (3-CCA) solutions were irradiated with seven different ion beams covering LET range from 0.5 to above 2000Â eV/nm. G-values of 7OH-CCA, one of hydroxylated products in radiolysis of the solutions, have been determined by fluorescence-HPLC technique in 3-CCA concentration range from 0.1 to 26Â mM. The formation yield of 7OH-CCA increased with increase in concentration of 3-CCA while it decreased with increase in LET value of ion beam. Compared with our previous reports on G(
- OH) at a scavenging capacity of 107 sâ1 with absorption spectroscopy, it was found that G(7OH-CCA) is about (4.7±0.6)% of G(
- OH), which is consistent for all of the ion beams used in the present study. However, 7OH-CCA yields in high 3-CCA concentration region, especially by using extremely high LET ions, were much higher than expected values based on the above conversion factor and G(
- OH) value predicted in theoretical work.
- OH) at a scavenging capacity of 107 sâ1 with absorption spectroscopy, it was found that G(7OH-CCA) is about (4.7±0.6)% of G(
- OH), which is consistent for all of the ion beams used in the present study. However, 7OH-CCA yields in high 3-CCA concentration region, especially by using extremely high LET ions, were much higher than expected values based on the above conversion factor and G(
- OH) value predicted in theoretical work.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Takuya Maeyama, Shinichi Yamashita, Gérard Baldacchino, Mitsumasa Taguchi, Atsushi Kimura, Takeshi Murakami, Yosuke Katsumura,