Abstract
A search for proton radioactivity in65As,69Br and77Y, produced as residues of fusion reactions, was carried out at the Orsay Tandem accelerator. The residues were collected at the image point of the spectrometer Soleno and implanted into the gaseous medium of an ionization chamber which was also used to detect the radioactivity protons. No such protons have been observed in the energy range of 250–600 keV and in the half-life interval of 10 μs-100 ms, within a production cross section sensitivity of 1 μb.
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References
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The good running of various systems was necessary in order to complete this work. We are indebted to several people for their close assistance: Mr J.C. Artiges, in the electronic system; Mr G. Renou, in the ionization chamber; Messrs A. Le Goff and G. Iltis, in the operation of the spectrometer Soleno. We also thank the crew of the target department for having provided us with high quality24Mg and Ca targets and the crew of the Tandem for the good running of the accelerator.