Abstract

A commercial electron impact spectrometer operating at an excitation energy of 100 eV and capable of energy resolution of the order of 10 mV is described. The advantages of electron impact spectroscopy for chemical analysis are reviewed with regard to the high resolution achieved. Several aspects of high resolution spectra of H2, N2, CO, and air are examined. Some comparisons are made with other high resolution spectra to indicate the reliability and accuracy of the method and the facility with which the presence of specific elements may be determined.

© 1970 Optical Society of America

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References

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  1. E. N. Lassettre, A. Skerbele, M. A. Dillon, K. J. Rossi, J. Chem. Phys. 48, 5066 (1967).
    [CrossRef]
  2. E. N. Lassettre, “Inelastic Scattering of Electrons by Atmospheric Gases,” Symposium on Laboratory Measurements of Aeronomic Interest, (York Univ., Toronto, Canada, September 3–4, 1968).
  3. American Laboratory, October1968.
  4. J. A. Simpson, C. E. Kuyatt, Rev. Sci. Instr. 38, 103 (1967).
    [CrossRef]
  5. J. A. Simpson, Rev. Sci. Instr. 35, 1968 (1964).
    [CrossRef]
  6. J. A. Simpson, L. Marton, Rev. Sci. Instr. 32, 802 (1961).
    [CrossRef]
  7. J. Geiger, H. Schmoranzer, J. Molec. Spectrosc. 32, 39 (1969).
    [CrossRef]
  8. G. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand, Princeton, N. J., 1950).
  9. J. A. Simpson, Mat. Res. Stand. 9, No. 8 (1969).

1969

J. Geiger, H. Schmoranzer, J. Molec. Spectrosc. 32, 39 (1969).
[CrossRef]

J. A. Simpson, Mat. Res. Stand. 9, No. 8 (1969).

1967

E. N. Lassettre, A. Skerbele, M. A. Dillon, K. J. Rossi, J. Chem. Phys. 48, 5066 (1967).
[CrossRef]

J. A. Simpson, C. E. Kuyatt, Rev. Sci. Instr. 38, 103 (1967).
[CrossRef]

1964

J. A. Simpson, Rev. Sci. Instr. 35, 1968 (1964).
[CrossRef]

1961

J. A. Simpson, L. Marton, Rev. Sci. Instr. 32, 802 (1961).
[CrossRef]

Dillon, M. A.

E. N. Lassettre, A. Skerbele, M. A. Dillon, K. J. Rossi, J. Chem. Phys. 48, 5066 (1967).
[CrossRef]

Geiger, J.

J. Geiger, H. Schmoranzer, J. Molec. Spectrosc. 32, 39 (1969).
[CrossRef]

Herzberg, G.

G. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand, Princeton, N. J., 1950).

Kuyatt, C. E.

J. A. Simpson, C. E. Kuyatt, Rev. Sci. Instr. 38, 103 (1967).
[CrossRef]

Lassettre, E. N.

E. N. Lassettre, A. Skerbele, M. A. Dillon, K. J. Rossi, J. Chem. Phys. 48, 5066 (1967).
[CrossRef]

E. N. Lassettre, “Inelastic Scattering of Electrons by Atmospheric Gases,” Symposium on Laboratory Measurements of Aeronomic Interest, (York Univ., Toronto, Canada, September 3–4, 1968).

Marton, L.

J. A. Simpson, L. Marton, Rev. Sci. Instr. 32, 802 (1961).
[CrossRef]

Rossi, K. J.

E. N. Lassettre, A. Skerbele, M. A. Dillon, K. J. Rossi, J. Chem. Phys. 48, 5066 (1967).
[CrossRef]

Schmoranzer, H.

J. Geiger, H. Schmoranzer, J. Molec. Spectrosc. 32, 39 (1969).
[CrossRef]

Simpson, J. A.

J. A. Simpson, Mat. Res. Stand. 9, No. 8 (1969).

J. A. Simpson, C. E. Kuyatt, Rev. Sci. Instr. 38, 103 (1967).
[CrossRef]

J. A. Simpson, Rev. Sci. Instr. 35, 1968 (1964).
[CrossRef]

J. A. Simpson, L. Marton, Rev. Sci. Instr. 32, 802 (1961).
[CrossRef]

Skerbele, A.

E. N. Lassettre, A. Skerbele, M. A. Dillon, K. J. Rossi, J. Chem. Phys. 48, 5066 (1967).
[CrossRef]

J. Chem. Phys.

E. N. Lassettre, A. Skerbele, M. A. Dillon, K. J. Rossi, J. Chem. Phys. 48, 5066 (1967).
[CrossRef]

J. Molec. Spectrosc.

J. Geiger, H. Schmoranzer, J. Molec. Spectrosc. 32, 39 (1969).
[CrossRef]

Mat. Res. Stand.

J. A. Simpson, Mat. Res. Stand. 9, No. 8 (1969).

Rev. Sci. Instr.

J. A. Simpson, C. E. Kuyatt, Rev. Sci. Instr. 38, 103 (1967).
[CrossRef]

J. A. Simpson, Rev. Sci. Instr. 35, 1968 (1964).
[CrossRef]

J. A. Simpson, L. Marton, Rev. Sci. Instr. 32, 802 (1961).
[CrossRef]

Other

E. N. Lassettre, “Inelastic Scattering of Electrons by Atmospheric Gases,” Symposium on Laboratory Measurements of Aeronomic Interest, (York Univ., Toronto, Canada, September 3–4, 1968).

American Laboratory, October1968.

G. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand, Princeton, N. J., 1950).

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Figures (8)

Fig. 1
Fig. 1

Spectrometer schematics showing physical relationship of components.

Fig. 2
Fig. 2

Spectrometer—actual physical arrangement.

Fig. 3
Fig. 3

Energy loss spectrum of H2 at 10-MeV resolution showing rotational and vibrational structure.

Fig. 4
Fig. 4

High resolution energy loss spectrum of the Lyman-Birge-Hopfield electric quadrupole transitions in N2.

Fig. 5
Fig. 5

Energy loss spectrum of N2 showing the relative intensities of optically forbidden and optically allowed transitions.

Fig. 6
Fig. 6

Energy loss spectrum of CO.

Fig. 7
Fig. 7

(a) Spectrum of normal air 7–14 eV. (b) Spectrum of normal air 12–19 eV.

Fig. 8
Fig. 8

Spectrum of air with a trace of CO added.

Tables (4)

Tables Icon

Table I Lyman B Bands of H2a

Tables Icon

Table II Werner C Band of H2a

Tables Icon

Table III Lyman-Birge-Hopfield Bands of N2a

Tables Icon

Table IV 4th Positive Group of COa

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