NEGATIVE-ION EMISSION DURING LASER-ABLATION OF MULTICOMPONENT MATERIALS

被引：16

作者：

ALIMPIEV, SS ^{[1
]}

BELOV, ME ^{[1
]}

MLINSKY, VV ^{[1
]}

NIKIFOROV, SM ^{[1
]}

ROMANJUK, VI ^{[1
]}

机构：

[1] MOSCOW ENGN PHYS INST,MOSCOW 115409,RUSSIA

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 1994年 / 58卷 / 01期

关键词：

D O I：

10.1007/BF00331519

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The time of flight technique coupled with an electrostatic energy filter has been used for composition and energy-distribution analysis of the ion species emitted during laser ablation of multicomponent materials Y-Ba-Cu-O, Pb-Sn-Te. The negative-ion output and kinetic-energy distribution as a function of the laser wavelength and the laser fluence on the target were measured. A high output of the negative ions of matrix elements comparable with the positive-ion emission was detected. The barium negative-ion formation was observed in spite of the negative electron affinity of alkaline earth elements in the ground electronic state. The mechanism of negative-ion formation based on the ternary collisional recombination in the laser plasma is analyzed.

引用

页码：67 / 72

页数：6

共 32 条

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