Abstract
At the Darmstadt UNILAC newα-emitting nuclei were produced in the bombardment of89Y and93Nb targets using84Kr ions with energies in the range of 5.1 to 5.5 MeV/u, and 5.8 to 6.4 MeV/u, and using86Kr ions with energies in the range of 5.6 to 6.0 MeV/u. Reaction recoils emitted from the targets were stopped and transported with argon to a collection site. Using three alpha detectors and spectrum multiscaling, energies and half-lives were measured. Ir and Re isotopes were identified by cross bombardments, excitation function data andα-systematics. The decay characteristics of the new species are as follows:
Estimates onα-branching ratios have been obtained for169, 170Os and166, 167, 168Re.
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Supported by „Bundesminister für Forschung und Technologie“
We would like to thank the UNILAC operational staff and the members of the target laboratory for the perfect collaboration. We would like to thank Prof. Dr. A. Flammersfeld for his interest in the present work.
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Schrewe, U.J., Schmidt-Ott, W.D., Dincklage, R.D.v. et al. Evidence of new isotopes:169, 170Ir,166, 167, 168Re. Z Physik A 288, 189–192 (1978). https://doi.org/10.1007/BF01408649
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DOI: https://doi.org/10.1007/BF01408649