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Alpha decay studies of new neutron-deficient francium isotopes and their daughters |
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| Authors: | G T Ewan E Hagberg B Jonson S Mattsson P Tidemand-Petersson |
| Institution: | 1. The ISOLDE Collaboration, CERN, Geneva, Switzerland 2. Queen's University, Kingston, Ontario, Canada 3. AECL, Chalk River Nuclear Laboratories, Chalk River, Ontario, Canada 4. GSI-Darmstadt, Darmstadt, Federal Republic of Germany |
| Abstract: | Neutron-deficient francium isotopes were produced by proton-induced spallation reactions and investigated by alpha spectroscopy following on-line mass separation. The new isotopes201, 202Fr were identified and their half-lives measured. An improved value for the half-life of203Fr was obtained. Alpha branching ratios were determined for198m, g, 199At. The derivation of the mass excess of202Fr and the systematics of alpha energies and reduced widths are discussed. |
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