STRUCTURE OF L2,3 ABSORPTION OF ALUMINUM AND ITS OXIDES

被引:42
作者
CODLING, K
MADDEN, RP
机构
[1] National Bureau of Standards, Washington, DC
[2] University of Reading, Reading, Berkshire
来源
PHYSICAL REVIEW | 1968年 / 167卷 / 03期
关键词
D O I
10.1103/PhysRev.167.587
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The LII,III region of absorption has been observed for thin films of evaporated aluminum, for amorphous (anodized) Al2O3, and for crystalline (γ-alumina) Al2O3. The spectra were obtained in high resolution (0.06), using the NBS 180-MeV electron synchrotron as a background source. The LII,III absorption edges of Al are located with improved accuracy at 169.49±0.05 and 170.49±0.05. This new value for the LIII edge can be combined with recent accurate determinations of the Kα1 emission line to locate also the K absorption edge of aluminum with a significant improvement in accuracy. Structure on the high-energy side of the LII,III edges is compatible with other recent observations. The L absorption edge of Al in Al2O3 is not split in high resolution, and is located at 162.11±0.15 for the amorphous form and 160.15±0.15 for the γ-alumina. Both forms show considerable structure on the high-energy side of the edge. That observed for the amorphous form is in agreement with other recent observations, while the absorption structure in γ-alumina (with maxima at 78.0, 78.6, 79.5, 84, and 99 eV) is reported here for the first time. © 1968 The American Physical Society.
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页码:587 / &
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