Direct time-resolved measurement of radical species formed in water by heavy ions irradiation

被引：37

作者：

Baldacchino, G

Bouffard, S

Balanzat, E

Gardès-Albert, M

Abedinzadeh, Z

Jore, D

Deycard, S

Hickel, B ^{[1
]}

机构：

[1] CEA Saclay, DSM DRECAM SCM URA 331 CNRS, F-91191 Gif Sur Yvette, France

[2] CEA, CNRS, CIRIL, F-14040 Caen, France

[3] Univ Paris 05, Chim Phys Lab, URa 400, F-75270 Paris, France

[4] Fac Pharm, F-14000 Caen, France

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1998年 / 146卷 / 1-4期

关键词：

LET; heavy ions; pulse radiolysis; water radiolysis; superoxide anion; hydrated electron;

D O I：

10.1016/S0168-583X(98)00463-7

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Time-resolved absorption spectroscopy has been used to detect radical species in water ionised by swift heavy ions. These experiments have been performed at the GANIL cyclotron (Caen-France) with C-12(6+) (75 MeV/A) and S-36(16+) (77 MeV/A) particles whose linear energy transfer (LET = -(dE/dx)(elec) is respectively two and three orders of magnitude greater than electron or gamma rays. The chemistry in water is thus considerably modified at the first moments after the ionisation. In particular the radiolytic yields of the radicals like hydrated electron decrease when the LET is increasing. The temporal structure of the beam is used to perform time-resolved spectroscopy of the transient radicals formed by water radiolysis within the microsecond time scale. It is possible to show the inhomogeneous chemistry around the ion tracks and to compare these results with the Monte Carlo simulations. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：528 / 532

页数：5

共 15 条

[11] CHEMICAL YIELDS OF IONIZING PARTICLES IN AQUEOUS SOLUTIONS - EFFECT OF ENERGY OF PROTONS AND DEUTERONS [J].