Magnetic field enhanced growth of carbon cluster ions in the laser ablation plume of graphite

被引：30

作者：

Kokai, F

Koga, Y

Heimann, RB

机构：

[1] NATL INST MAT & CHEM RES,TSUKUBA,IBARAKI 305,JAPAN

[2] FREIBERG UNIV MIN & TECHNOL,D-09596 FREIBERG,GERMANY

来源：

APPLIED SURFACE SCIENCE | 1996年 / 96-8卷

关键词：

D O I：

10.1016/0169-4332(95)00430-0

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：

Time-of-flight mass spectrometric studies were carried out on neutral and positive ion clusters, composed of up to twenty carbon atoms, produced by Nd:YAG laser ablation of graphite in the presence of magnetic fields in the range of 0.03-0.10 T. The growth of larger carbon cluster ions with C-11(+) dominance in the laser-ionized ablation plume of graphite was found to be enhanced by the magnetic fields. We believe that an enhancement of ion-neutral reactions due to an increase of ionic species, resulting from collisional ionization of neutral species through a confinement of electrons, leads to the growth of larger carbon cluster ions.

引用

页码：261 / 266

页数：6

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