Abstract
WHILE trying to improve the thermal ionization efficiency of certain elements evaporated from mass-spectrometer solid sources, we have had occasion to measure the ratio silver-107 to silver-109, the accepted value of which is 1.055 ± 0.003 due to White and Cameron1–3. Our results do not agree with this value, but rather with the value of 1.0825 given by Hess, Marshall and Urey4, and also with an earlier value given by Paul5.
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References
White, J. R., and Cameron, A. E., Phys. Rev., 74, 991 (1948).
Bainbridge, K. T., and Nier, A. O., “Relative Isotopic Abundances of the Elements”, Preliminary Report 9, Nuclear Science Series (Nat. Res. Council, Washington, D.C.).
Stehn, J. R., and Clancy, E. F., “Chart of the Nuclides” (Knolls Atomic Power Laboratory, G.E. Company of America).
Hess, D. C., Marshall, R. R., and Urey, H. C., Science, 126, 1291 (1957).
Paul, W., Naturwiss., 31, 419 (1943).
Duckworth, H. E., “Mass Spectrometry” (Cambridge, 1958).
Emeléus, H. J., and Anderson, J. S., “Modern Aspects of Inorganic Chemistry” (Routledge and Kegan Paul, Ltd., London, 1952).
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CROUCH, E., PREECE, E., SWAINBANK, I. et al. Atomic Weight of Silver. Nature 184, 358–359 (1959). https://doi.org/10.1038/184358a0
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DOI: https://doi.org/10.1038/184358a0
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