Quantitative studies of the photoabsorption (4.5-488 eV) and photoionization (9-59.5 eV) of methyl iodide using dipole electron impact techniques
Quantitative studies of the photoabsorption (4.5-488 eV) and photoionization (9-59.5 eV) of methyl iodide using dipole electron impact techniques
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DOI：
10.1016/s0301-0104(97)00368-6
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发表时间：
1998-06-15
期刊：
影响因子：
2.3
通讯作者：
Brion, CE
中科院分区：
文献类型：
--
作者：
Olney, TN;Cooper, G;Brion, CE
用低分辨（1 eV半高宽）偶极（e，e）谱测量了CH_3 I的价壳层、I_4d、4p、4s和C_Is内壳层光吸收的绝对振子强度（截面），等效光子能量范围为4.5 ~ 488 eV.此外，还用高分辨（0.05- 0.1eV半高宽）偶极（e，e）光谱详细研究了CH_3I分子在4 - 65 eV范围内的绝对价层和I_4d内层光吸收谱。用偶极（e，e +离子）光谱法测定了CH 3 I分子和离解光电离的光电离效率、离子光碎裂分支比和绝对偏振子强度，从第一电离阈值到59.5 eV。根据这些结果预测了离子偶极诱导击穿的主要途径。从偶极诱导击穿方案和分子及离解光电离部分振子强度出发，估算了CH 3 I+光电离部分振子强度. (C)1998 Elsevier Science B. V.保留所有权利。
Absolute oscillator strengths (cross sections) for the valence shell, I 4d, 4p, 4s and C Is inner shell photoabsorption of CH3I have been measured using low resolution(l eV fwhm) dipole (e,e) spectroscopy in the equivalent photon energy range from 4.5 to 488 eV. In addition, high resolution (0.05-0.1 eV fwhm) dipole (e,e) spectroscopy has been used to study the absolute valence shell and I 4d inner shell photoabsorption spectra of CH3I from 4 to 65 eV in mon detail. The photoionization efficiency, ionic photofragmentation branching ratios and absolute partial oscillator strengths for molecular and dissociative photoionization have been determined for CH3I by dipole (e,e + ion) spectroscopy from the first ionization threshold to 59.5 eV. The major pathways of the ionic dipole induced breakdown scheme have been predicted from these results. Estimates of the absolute electronic state partial oscillator strengths of CH3I+ from photoionization of CH3I were derived from the dipole induced breakdown scheme and the molecular and dissociative photoionization partial oscillator strengths. (C) 1998 Elsevier Science B.V. All rights reserved.