Zinc Oxide Smoke as a Reference Standard in Electron Wave-Length Calibration

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Abstract
Zinc oxide smoke and thinned gold foil were studied with x‐rays and electrons. Our x‐ray values for the lattice constants of zinc oxide and electron diffraction value for its axial ratio agree satisfactorily with Bunn's x‐ray values. Our investigation also reveals no variation in these lattice constants with the age of the sample. With regard to the relative values for the lattice constants of zinc oxide and gold, both methods give consistent results. Our work indicates that the wave‐length calibrations obtainable with zinc oxide smoke and with gold foil are in satisfactory agreement, contrary to the finding of Finch and Wilman.

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