Abstract

The soft x-ray absorption spectra of Be and BeO were measured near the K edge using the NBS 180 MeV synchrotron as a background continuum source. The energy-loss spectrum of 20-keV electrons transmitted through thin Be films at zero scattering angle was measured in the corresponding 100–170 eV energy-loss range. The K edges of Be and BeO measured by x-ray absorption were at 112.1±0.2 eV and 118.4±0.2 eV, respectively. The Be K edge in the electron-energy-loss spectrum was at 111.7±0.4 eV. The positions of maxima in the absorption fine structure determined by the two techniques were also in good agreement.

© 1968 Optical Society of America

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References

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  1. H. Watanabe, Japan J. Appl. Phys. 3, 804 (1964).
    [CrossRef]
  2. N. Swanson and C. J. Powell, Phys. Rev. 167, 592 (1968).
    [CrossRef]
  3. R. P. Madden, D. L. Ederer, and K. Codling, Appl. Opt. 6, 31 (1967).
    [CrossRef] [PubMed]
  4. K. Codling and R. P. Madden, J. Appl. Phys. 36, 380 (1965).
    [CrossRef]
  5. L. Marton and J. A. Simpson, Rev. Sci. Instr. 29, 567 (1958).
    [CrossRef]
  6. N. Swanson, J. Opt. Soc. Am. 54, 1130 (1964).
    [CrossRef]
  7. If we assume the longitudinal and transverse dielectric constants are equal in this energy range. See V. Ambegaokar and W. Kohn, Phys. Rev. 117, 423 (1960), particularly Ref. 11.
    [CrossRef]
  8. N. Swanson and C. J. Powell, Phys. Rev. 145, 195 (1966).
    [CrossRef]
  9. A. P. Lukirskii and I. A. Brytov, Fiz. Tverd. Tela. 6, 43 (1964). [English transl.: Sov. Phys.—Solid State 6, 33 (1964)].
  10. T. J. Peterson, E. J. McGuire, and D. H. Tomboulian, Phys. Rev. 129, 674 (1963).
    [CrossRef]
  11. T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
    [CrossRef]
  12. K. Codling and R. P. Madden, Phys. Rev. 167, 587 (1968).
    [CrossRef]
  13. C. E. Moore, Atomic Energy Levels, Natl. Bur. Std. (U. S.) Circ. 467 (Washington, D. C., 1949–1958).
  14. K. Codling, R. P. Madden, and D. L. Ederer, Phys. Rev. 155, A26 (1967).
    [CrossRef]

1968 (2)

N. Swanson and C. J. Powell, Phys. Rev. 167, 592 (1968).
[CrossRef]

K. Codling and R. P. Madden, Phys. Rev. 167, 587 (1968).
[CrossRef]

1967 (2)

K. Codling, R. P. Madden, and D. L. Ederer, Phys. Rev. 155, A26 (1967).
[CrossRef]

R. P. Madden, D. L. Ederer, and K. Codling, Appl. Opt. 6, 31 (1967).
[CrossRef] [PubMed]

1966 (2)

N. Swanson and C. J. Powell, Phys. Rev. 145, 195 (1966).
[CrossRef]

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

1965 (1)

K. Codling and R. P. Madden, J. Appl. Phys. 36, 380 (1965).
[CrossRef]

1964 (3)

H. Watanabe, Japan J. Appl. Phys. 3, 804 (1964).
[CrossRef]

N. Swanson, J. Opt. Soc. Am. 54, 1130 (1964).
[CrossRef]

A. P. Lukirskii and I. A. Brytov, Fiz. Tverd. Tela. 6, 43 (1964). [English transl.: Sov. Phys.—Solid State 6, 33 (1964)].

1963 (1)

T. J. Peterson, E. J. McGuire, and D. H. Tomboulian, Phys. Rev. 129, 674 (1963).
[CrossRef]

1960 (1)

If we assume the longitudinal and transverse dielectric constants are equal in this energy range. See V. Ambegaokar and W. Kohn, Phys. Rev. 117, 423 (1960), particularly Ref. 11.
[CrossRef]

1958 (1)

L. Marton and J. A. Simpson, Rev. Sci. Instr. 29, 567 (1958).
[CrossRef]

Ambegaokar, V.

If we assume the longitudinal and transverse dielectric constants are equal in this energy range. See V. Ambegaokar and W. Kohn, Phys. Rev. 117, 423 (1960), particularly Ref. 11.
[CrossRef]

Brytov, I. A.

A. P. Lukirskii and I. A. Brytov, Fiz. Tverd. Tela. 6, 43 (1964). [English transl.: Sov. Phys.—Solid State 6, 33 (1964)].

Codling, K.

K. Codling and R. P. Madden, Phys. Rev. 167, 587 (1968).
[CrossRef]

K. Codling, R. P. Madden, and D. L. Ederer, Phys. Rev. 155, A26 (1967).
[CrossRef]

R. P. Madden, D. L. Ederer, and K. Codling, Appl. Opt. 6, 31 (1967).
[CrossRef] [PubMed]

K. Codling and R. P. Madden, J. Appl. Phys. 36, 380 (1965).
[CrossRef]

Ederer, D. L.

R. P. Madden, D. L. Ederer, and K. Codling, Appl. Opt. 6, 31 (1967).
[CrossRef] [PubMed]

K. Codling, R. P. Madden, and D. L. Ederer, Phys. Rev. 155, A26 (1967).
[CrossRef]

Ejiri, A.

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Fujiwara, S.

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Iguchi, Y.

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Kohn, W.

If we assume the longitudinal and transverse dielectric constants are equal in this energy range. See V. Ambegaokar and W. Kohn, Phys. Rev. 117, 423 (1960), particularly Ref. 11.
[CrossRef]

Lukirskii, A. P.

A. P. Lukirskii and I. A. Brytov, Fiz. Tverd. Tela. 6, 43 (1964). [English transl.: Sov. Phys.—Solid State 6, 33 (1964)].

Madden, R. P.

K. Codling and R. P. Madden, Phys. Rev. 167, 587 (1968).
[CrossRef]

K. Codling, R. P. Madden, and D. L. Ederer, Phys. Rev. 155, A26 (1967).
[CrossRef]

R. P. Madden, D. L. Ederer, and K. Codling, Appl. Opt. 6, 31 (1967).
[CrossRef] [PubMed]

K. Codling and R. P. Madden, J. Appl. Phys. 36, 380 (1965).
[CrossRef]

Marton, L.

L. Marton and J. A. Simpson, Rev. Sci. Instr. 29, 567 (1958).
[CrossRef]

McGuire, E. J.

T. J. Peterson, E. J. McGuire, and D. H. Tomboulian, Phys. Rev. 129, 674 (1963).
[CrossRef]

Moore, C. E.

C. E. Moore, Atomic Energy Levels, Natl. Bur. Std. (U. S.) Circ. 467 (Washington, D. C., 1949–1958).

Nakamura, M.

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Oshio, T.

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Peterson, T. J.

T. J. Peterson, E. J. McGuire, and D. H. Tomboulian, Phys. Rev. 129, 674 (1963).
[CrossRef]

Powell, C. J.

N. Swanson and C. J. Powell, Phys. Rev. 167, 592 (1968).
[CrossRef]

N. Swanson and C. J. Powell, Phys. Rev. 145, 195 (1966).
[CrossRef]

Sagawa, T.

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Sasaki, T.

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Sasanuma, M.

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Simpson, J. A.

L. Marton and J. A. Simpson, Rev. Sci. Instr. 29, 567 (1958).
[CrossRef]

Swanson, N.

N. Swanson and C. J. Powell, Phys. Rev. 167, 592 (1968).
[CrossRef]

N. Swanson and C. J. Powell, Phys. Rev. 145, 195 (1966).
[CrossRef]

N. Swanson, J. Opt. Soc. Am. 54, 1130 (1964).
[CrossRef]

Tomboulian, D. H.

T. J. Peterson, E. J. McGuire, and D. H. Tomboulian, Phys. Rev. 129, 674 (1963).
[CrossRef]

Watanabe, H.

H. Watanabe, Japan J. Appl. Phys. 3, 804 (1964).
[CrossRef]

Yamaguchi, S.

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Yokota, M.

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Appl. Opt. (1)

Fiz. Tverd. Tela. (1)

A. P. Lukirskii and I. A. Brytov, Fiz. Tverd. Tela. 6, 43 (1964). [English transl.: Sov. Phys.—Solid State 6, 33 (1964)].

J. Appl. Phys. (1)

K. Codling and R. P. Madden, J. Appl. Phys. 36, 380 (1965).
[CrossRef]

J. Opt. Soc. Am. (1)

J. Phys. Soc. Japan (1)

T. Sagawa, Y. Iguchi, M. Sasanuma, A. Ejiri, S. Fujiwara, M. Yokota, S. Yamaguchi, M. Nakamura, T. Sasaki, and T. Oshio, J. Phys. Soc. Japan 21, 2602 (1966).
[CrossRef]

Japan J. Appl. Phys. (1)

H. Watanabe, Japan J. Appl. Phys. 3, 804 (1964).
[CrossRef]

Phys. Rev. (6)

N. Swanson and C. J. Powell, Phys. Rev. 167, 592 (1968).
[CrossRef]

If we assume the longitudinal and transverse dielectric constants are equal in this energy range. See V. Ambegaokar and W. Kohn, Phys. Rev. 117, 423 (1960), particularly Ref. 11.
[CrossRef]

N. Swanson and C. J. Powell, Phys. Rev. 145, 195 (1966).
[CrossRef]

T. J. Peterson, E. J. McGuire, and D. H. Tomboulian, Phys. Rev. 129, 674 (1963).
[CrossRef]

K. Codling and R. P. Madden, Phys. Rev. 167, 587 (1968).
[CrossRef]

K. Codling, R. P. Madden, and D. L. Ederer, Phys. Rev. 155, A26 (1967).
[CrossRef]

Rev. Sci. Instr. (1)

L. Marton and J. A. Simpson, Rev. Sci. Instr. 29, 567 (1958).
[CrossRef]

Other (1)

C. E. Moore, Atomic Energy Levels, Natl. Bur. Std. (U. S.) Circ. 467 (Washington, D. C., 1949–1958).

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Figures (2)

Fig. 1
Fig. 1

Microdensitometer traces of the K-shell x-ray absorption spectrum of Be (curve 1) and BeO (curve 2). Positions of maxima in the absorption are denoted by capital letters for Be and by lower-case letters for BeO. See also Tables I and II. The energy levels of the Be++ ion with respect to its ground state are marked at the bottom of the figure.

Fig. 2
Fig. 2

An electron-energy-loss spectrum of a 9.5 μg/cm2 thick Be film. The positions of the absorption edge and energy-loss maxima are marked by vertical lines (see Table I). These loss maxima are superimposed on a background arising from the decreasing tail of the energy loss below the absorption edge (long-dashed line), and from electrons which have excited a plasmon as well as a K-shell electron. The short-dashed line shows the sum of these two components of the background.

Tables (2)

Tables Icon

Table I Positions of the structure in the K-absorption spectra of Be shown in Figs. 1 and 2. The stated errors represent the estimated probable errors in the measurements. Results of two recent x-ray absorption measurements are also shown. The energy-loss maxima E1E5 should be increased in energy about 0.5 eV for comparison with the x-ray absorption results (see Sec. III). All energies are in eV.

Tables Icon

Table II Positions of the structure in the K-absorption spectrum of BeO shown in Fig. 1. The stated errors represent the estimated probable errors. For comparison the results of Lukirskii and Brytov (Ref. 9) are also shown. All energies are in eV.