New nuclide 139Tb and (EC +β+) decay of 138,139Gd
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The unknown isotope 139Tb and the known isotopes 138,139Gd were produced in the 36Ar+106Cd reaction and studied by using a He-jet tape transport system in combination with X-γ and γ-γ coincidence measurements. The half-lives of 139Tb, 139gGd, 139mGd and 138Gd were determined to be 1.6(2), 5.8(9), 4.8(9) and 4.7(9) s, respectively. Partial (EC+β+) decay schemes of 139gGd, 139mGd and 138Gd were proposed for the first time.
- New nuclide 139Tb and (EC +β+) decay of 138,139Gd
The European Physical Journal A - Hadrons and Nuclei
Volume 6, Issue 3 , pp 239-241
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- PACS: 23.40.-s β decay; double β decay; electron and muon capture – 21.10.Tg Lifetimes – 27.60.+j 90 < A < 149