Abstract
COMPLETE nuclear fusion has been produced by bombarding targets of germanium, cadmium and thorium with 450 MeV Kr23+ and 500 MeV Kr24+ obtained from the Orsay accelerator ALICE1. Recoiling synthesized nuclei were slowed down in helium gas, transferred through a capillary tube and deposited on a steel rod in an evacuated enclosure2. An annular silicon semiconductor counter around the capillary tube detected the alpha particles produced by the decaying nuclei. Typical bombardment times were of the order of 10 h with 108 Kr ions s−1, and the background was shown to be insignificant by bombarding for 24 h without a target in place. Further tests also showed that secondary neutrons and gamma rays did not induce nuclear reactions in the detector.
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BIMBOT, R., DEPRUN, C., GARDÉS, D. et al. Complete Fusion induced by Krypton Ions: Indications for Synthesis of Superheavy Nuclei. Nature 234, 215–216 (1971). https://doi.org/10.1038/234215a0
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DOI: https://doi.org/10.1038/234215a0
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