Determination of the time-dependent OH-yield by using fluorescent probe. Application to heavy ion irradiation

被引：44

作者：

Baldacchino, G. ^{[1
,2
]}

Maeyama, T. ^{[3
]}

Yamashita, S. ^{[4
]}

Taguchi, M. ^{[5
]}

Kimura, A. ^{[5
]}

Katsumura, Y. ^{[3
,4
]}

Murakami, T. ^{[6
]}

机构：

[1] CEA, Lab Radiolyse, SCM, IRAMIS, F-91191 Gif Sur Yvette, France

[2] CNRS, Lab Claude Frejacques, F-91191 Gif Sur Yvette, France

[3] Univ Tokyo, Sch Engn, Dept Nucl Engn & Management, Bunkyo Ku, Tokyo 1138656, Japan

[4] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[5] Japan Atom Energy Agcy, Quantum Beam Sci Directorate, Gunma 3701292, Japan

[6] Natl Inst Radiol Sci, Res Ctr Charged Particle Therapy, Inage Ku, Chiba 2638555, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2009年 / 468卷 / 4-6期

关键词：

HIGH-ENERGY CARBON; METHYL VIOLOGEN SOLUTIONS; HYDROXYL RADICAL YIELDS; PULSE-RADIOLYSIS; RADIATION-CHEMISTRY; AQUEOUS-SOLUTIONS; WATER RADIOLYSIS; LIQUID WATER; ARGON IONS; HYDRATED ELECTRON;

D O I：

10.1016/j.cplett.2008.12.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This Letter reports a sensitive method using HPLC-Fluorescence detection of *OH in liquid water under high-energy heavy ion irradiation. The coumarin-3-carboxylic-acid (3CCA) molecule was selected for probing *OH and providing the fluorescent 7-hydroxy-coumarin-3-carboxylic-acid (7OH-3CCA). Since the concentration limit achievable is better than 1 nM, the radiolytic yields were determined with a sensitivity of 2 x 10(9) mol/J for 4.8 GeV-(12)C(6+) of and 20 GeV-(40)Ar(18+) in the ns time range. They decrease with the linear energy transfer from 2.8 x 10(7) to 1.3 x 10(7) mol/J (C(6+) of 11 eV/nm) and 1.5 x 10(7) to 0.9 x 10(7) mol/J (Ar(18+) of 90 eV/nm) which is in agreement with the literature data. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：275 / 279

页数：5

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