Abstract
Alper and du Preez1, working in this laboratory, have reported the production in an atomic pile of manganese-54 from iron-54; but two later studies of pile-irradiated iron2,3 have not shown the presence of manganese. To clarify the position, we have had the following samples irradiated in the Harwell pile: (1) one 1 gm. sample of sulphur; (2) two samples (10–13 mgm.) of iron enriched in iron-54 and wrapped in cadmium foil 20–30 mils thick; (3) two samples (3 gm. each) of spectroscopically pure iron also shielded with cadmium; (4) two samples of iron (1 gm. each) with no cadmium shielding.
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References
Alper, T., and du Preez, L., Nature, 165, 189 (1950).
Freirson, W. J., and Jones, W., Anal. Chem., 23, 1447 (1951).
Michalowicz, A., and Lederer, M. (private communication).
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Bainbridge, K. T., and Nier, A. O., “Relative Isotopic Abundances of the Elements”, N.R.C. Preliminary Report No. 9 (December 1950).
Livingood, J. J., and Seaborg, G. T., Phys. Rev., 54, 391 (1938).
Deutsch, M., and Elliot, L. G., Phys. Rev., 65, 211 (1944).
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STAFFORD, G., STEIN, L. The 54Fe(n,p)54Mn Reaction. Nature 172, 1103 (1953). https://doi.org/10.1038/1721103a0
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DOI: https://doi.org/10.1038/1721103a0
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