A study on the kinetic energy of the laser-ablated cation using time-of-flight mass spectrometry

被引:0
|
作者
Shin, DN
Im, HS
Jung, KH
机构
[1] KOREA RES INST STAND & SCI,SURFACE ANAL GRP,TAEJON 305600,SOUTH KOREA
[2] KOREA ADV INST SCI & TECHNOL,CTR MOL SCI,TAEJON 305701,SOUTH KOREA
[3] KOREA ADV INST SCI & TECHNOL,DEPT CHEM,TAEJON 305701,SOUTH KOREA
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中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The initial kinetic energy of laser-ablated Zn cation has been investigated via time-of-night mass spectrometry. The night times of the ions have been measured with a high voltage pulse on the extract electrode in the mass spectrometer, which has been delayed from the laser pulse. The time-of-flight equation including the initial kinetic energy term of the ion has been derived for the mass spectrometer. The optimum value of the initial kinetic energy has been extracted by fitting the measured night times into the time-of-flight equation. The initial kinetic energy of the ions generated by Nd:YAG laser (532 nm) at the power density of 5x10(7) W/cm(2) has been determined to be 22-44 kJ/mol.
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页码:171 / 174
页数:4
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