Disintegration Schemes of Radioactive Substances. IV.Fe59
Abstract
The mode of disintegration of the 47-day isotope of iron ${\mathrm{Fe}}^{59}$ has been investigated by spectrometer and coincidence techniques. The beta-ray spectrum is complex, consisting of two components of approximately equal intensity with end points 0.257\ifmmode\pm\else\textpm\fi{}0.008 Mev and 0.460\ifmmode\pm\else\textpm\fi{}0.007 Mev. The low energy group is accompanied by gamma-rays of energy 1.30\ifmmode\pm\else\textpm\fi{}0.02 Mev, and the high energy group by gamma-rays of energy 1.10\ifmmode\pm\else\textpm\fi{}0.02 Mev. No beta-rays of energy greater than 0.460 Mev are present to as much as 0.25 percent of the main group. The yield of ${\mathrm{Fe}}^{59}$ from an iron target bombarded by 12-Mev deuterons is 0.05 microcurie per microampere hour. Methods of purification and preparation are described.
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