Extended X-ray emission fine structure of sodium†

Abstract

Sodium X-ray emission spectra of NaCl powder were measured by wavelength-dispersive X-ray fluorescence spectrometry and electron probe microanalysis. The X-ray emission spectra show an oscillating fine structure similar to that of the extended X-ray absorption fine structure (EXAFS). The Fourier transform of the X-ray fluorescence spectrum shows a similar radial distribution of atoms around the sodium. These findings demonstrate that a wavelength-dispersive X-ray emission spectrometer is a powerful tool for analyzing the local structure around a light element in condensed matter, which is still not an easy task with using a third-generation synchrotron radiation facility.

References

1. D. E. Sayers, E. A. Stern and F. W. Lytle, Phys. Rev. Lett., 1971, 27, 1204.
2. F. Bloch, Phys. Rev., 1935, 48, 187.
3. T. Åberg, Phys. Rev. A, 1971, 4, 1735.
4. J. Kawai, T. Nakajima, T. Inoue, H. Adachi, M. Yamaguchi, K. Maeda and S. Yabuki, Analyst, 1994, 119, 601.
5. K. Hayashi, J. Kawai and Y. Awakura, Spectrochim. Acta, Part B, in the press.
6. J. Kawai, K. Hayashi and Y. Awakura, J. Phys. Soc. Jpn., 1997, 66, 3337.
7. S. Tanuma and M. Nishio, Spectrochim. Acta, Part B, in the press.
8. J. Kawai and K. Hayashi, J. Electron Spectrosc. Relat. Phenom., in the press.
9. T. Murata, T. Matsukawa and S. Naoe, Solid State Commun., 1988, 66, 787.
10. T. Murata, T. Matsukawa and S. Naoe, Physica B, 1989, 158, 610.
11. R. W. G. Wyckoff, Crystal Structures, Interscience, New York, vol. 1, 1948, ch. III, Table IIIa1.
12. E. Hofer, in Energy-Filtering Transmission Electron Microscopy, ed. Reimer, L., Springer, Berlin, 1995, pp. 225–268.