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Decays of odd-odd N - Z = 2 nuclei above Sn: The observation of proton radioactivity from Cs

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Original languageEnglish
Pages (from-to)1798-1801
Number of pages4
JournalPhysical Review Letters
Issue number12
Publication statusPublished - 1 Jan 1994


The discovery of the new proton emitter Cs with an energy of 807 ± 7 keV and a half-life of 500 ± 100 μs is reported. WKB half-life calculations indicate d proton emission with a low spectroscopic factor comparable to values for I and Cs. This behavior is consistent with the onset of deformation in this region. The odd-odd nuclides Cs and I have significantly lower Q values than the corresponding isotopes lying closer to stability, which is attributed to strong pairing forces between the odd nucleons. The half-life of Cs has been measured with improved precision as 17 ± 2 μs.

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