Abstract
IN 1928 I published some investigations1 on the X-ray wave-length of the aluminium K1,2 line on the absolute scale, as obtained with the plane ruled grating method. From this the wave-length in question came out as about 0.15 per cent higher on the absolute scale than that found by the ordinary crystal method. This difference was considerably greater than expected from the stated uncertainties of the constants involved in the computation of the crystal lattice of calcite, which constitutes the crystal scale. As is well known, this result therefore was looked upon with decided scepticism.
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References
Erik Bäcklin, Diss., Uppsala Univ. Årsskrift.
J. A. Bearden, Phys. Rev., (2) 37, 1210; 1931.
S. K. Allison, Phys. Rev., (2) 44, 163; 1933.
Y. Tu, Phys. Rev., (2) 40, 662; 1932.
loc. cit. and NATURE, 123, 409; 1929.
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BÄCKLIN, E. The X-Ray Crystal Scale, the Absolute Scale and the Electronic Charge. Nature 135, 32–33 (1935). https://doi.org/10.1038/135032a0
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DOI: https://doi.org/10.1038/135032a0
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