Electron Diffraction by Liquids

Louis R. Maxwell

doi:10.1103/PhysRev.44.73

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Electron Diffraction by Liquids

Louis R. Maxwell^*

Fertilizer and Fixed Nitrogen Division, Bureau of Chemistry and Soils, Washington, D. C.

^*A preliminary report on this work is contained in the regular program of the Washington meeting (April 1933) of the American Physical Society. K. Lark-Horovitz and E. P. Miller reported a paper at this meeting on the x-ray diffraction by liquids which confirmed the results reported to the extent of obtaining for Cenco pump oil the same ratios for (1/λ) sin θ/2 for the rings observed.

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Phys. Rev. 44, 73 – Published 15 July, 1933

DOI: https://doi.org/10.1103/PhysRev.44.73

Abstract

Electron interference has been obtained by the transmission of electrons (14 to 30 kv) through thin liquid films of phytol ( $C_{20}$ $H_{39}$ OH), Nujol and two different grades of Cenco vacuum pump oil. The patterns obtained for these four liquids are all practically the same and are characterized by three complete diffraction rings. The values of $(\frac{1}{λ}) \frac{sin θ}{2}$ for phytol were found to be 0.108, 0.236 and 0.420. These rings could be produced by diffracting planes of spacings 4.63A, 2.1A and 1.2A. These distances are practically identical with the values obtained by G. W. Stewart for x-ray diffraction in liquid pentadecane ( $C_{15}$ $H_{32}$ ) and tetradecane ( $C_{14}$ $H_{30}$ ). The problem of interpreting the results by a group theory such as proposed by Stewart is the same for electrons as for x-rays.

References (11)

C. Davisson and L. H. Germer, Nature 119, 558 (1927) Phys. Rev. 30, 705 (1927)
F. Kirchner, Ergebnisse der Exakten Naturwissenschaften 11, 64 (1932)
R. Wierl, Ann. d. Physik 8, 521 (1931) ibid.13, 453 (1932)
J. Hengstenberg and L. Brú, Anales Soc. Espana. Fis y Quim 30, 341 (1932) L. Brockway and L. Pauling, Proc. Nat. Akad. 19, 68 (1933) ibid.19, 303 (1933) L. R. Maxwell, M. E. Jefferson and V. M. Mosley, Phys. Rev. 43, 777 (1933)
Omitted endnote
G. P. Thomson, Proc. Roy. Soc. A117, 600 (1928)
S. B. Hendricks, L. R. Maxwell, V. M. Mosley and M. E. Jefferson, J. Chem. Phys. Aug. 1933
F. Fischer and K. Lowenberg, Ann. d. Chemie 474, 69 (1928)
G. W. Stewart, Phys. Rev. 31, 174 (1928)
G. W. Stewart, Phys. Rev. 30, 232 (1927) ibid.31, 1 (1928) ibid.31, 174 (1928) ibid.32, 153 (1928) ibid.32, 558 (1928)
G. P. Thomson and C. A. Murison, Nature 131, 237 (1933)

[c1] C. Davisson and L. H. Germer, Nature 119, 558 (1927) Phys. Rev. 30, 705 (1927)

[c2] F. Kirchner, Ergebnisse der Exakten Naturwissenschaften 11, 64 (1932)

[c3] R. Wierl, Ann. d. Physik 8, 521 (1931) ibid.13, 453 (1932)

[c4] J. Hengstenberg and L. Brú, Anales Soc. Espana. Fis y Quim 30, 341 (1932) L. Brockway and L. Pauling, Proc. Nat. Akad. 19, 68 (1933) ibid.19, 303 (1933) L. R. Maxwell, M. E. Jefferson and V. M. Mosley, Phys. Rev. 43, 777 (1933)

[c5] Omitted endnote

[c6] G. P. Thomson, Proc. Roy. Soc. A117, 600 (1928)

[c7] S. B. Hendricks, L. R. Maxwell, V. M. Mosley and M. E. Jefferson, J. Chem. Phys. Aug. 1933

[c8] F. Fischer and K. Lowenberg, Ann. d. Chemie 474, 69 (1928)

[c9] G. W. Stewart, Phys. Rev. 31, 174 (1928)

[c10] G. W. Stewart, Phys. Rev. 30, 232 (1927) ibid.31, 1 (1928) ibid.31, 174 (1928) ibid.32, 153 (1928) ibid.32, 558 (1928)

[c11] G. P. Thomson and C. A. Murison, Nature 131, 237 (1933)

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Electron Diffraction by Liquids

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