Abstract
IT has long been recognized that some of the halos observed on X-ray photographs of liquids and amorphous substances may be spurious and due to the white radiation peak. Some of the observed reflections obtained from concentrated solutions of tobacco mosaic virus1 were under suspicion for this reason, and the use of a nickel filter did not serve to resolve our doubts. Consequently, it was necessary to attempt to use monochromatic radiation. This was achieved as described below. As shown in Fig. 1, the use of monochromatic radiation decisively establishes the spurious nature of the innermost reflection.
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References
Bawden, Pirie, Bernal and Fankuchen, NATURE, 138, 1051 (Dec. 19, 1936).
Stephen and Barnes, NATURE, 136, 793 (Nov. 16, 1935); 137, 532 (March 28, 1936).
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FANKUCHEN, I. A Condensing Monochromator for X-Rays. Nature 139, 193–194 (1937). https://doi.org/10.1038/139193a0
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DOI: https://doi.org/10.1038/139193a0
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