Abstract
IN view of the fact that copper has only two stable isotopes and, it is difficult to account for the large number of different half-life periods reported for radioactive copper isotopes. Of the two short periods of 6 min. and 10.5 min., the latter has been satisfactorily attributed to Periods of 6h. and 10h. have been obtained by neutron bombardment1,5 and a 12.8h. period given by deuteron bombardment2,2. Since this latter product emits both positrons and electrons, there is good evidence for labelling it. A radioactive copper has been chemically separated from zinc bombarded by fast neutrons, of half-life variously reported at 6h. and 10h.1,5,8.. Madsen has directed attention to the confusion over these periods and gives the half-life period of the copper obtained from zinc as 17h.7.
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OESER, E., TUCK, J. Radioactive Isotopes of Copper. Nature 139, 1110 (1937). https://doi.org/10.1038/1391110a0
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DOI: https://doi.org/10.1038/1391110a0
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