Abstract
Excitation functions for the ( p, xn) ( x=3−5), ( p, pxn) ( x=1−4) and ( p, α3 n) reactions on 85Rb with 14–70 MeV protons have been measured by means of the activation method. Enriched 85RbCl targets were irradiated with energy-analyzed protons from the AVF cyclotron at Osaka University. Disintegration rates of product nuclides were obtained from intensities of selected γ-rays with calibrated Ge(Li) detectors. Thick target yields of 81Rb for medical use and other radioactive products were calculated from measured excitation functions. The calculated thick target yield of 81Rb was 31.2 mCi μA −1 h −1 at E p =70 MeV. The thick target yield of 81Rb chemically separated from 81Sr, by the reaction 85Rb( p, 5 n) 81Sr( β +, EC) 81Rb, was obtained to be 2.3 mCi μA −1 h −1 at 96.4 min.
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