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 Physical Review Letters 93 (2004) 072502
 Direct Mass Measurements on the Superallowed Emitter $^{74}$Rb and its Daughter $^{74}$Kr
 (2004)
 The decay energy of the superallowed ? decay 74Rb(?+)74Kr was determined by direct Penning trap mass measurements on both the mother and the daughter nuclide using the time-of-flight resonance technique and found to be Q = 10416.8(4.5) keV. The exotic nuclide 74Rb, with a half-life of only 65 ms, is the shortest-lived nuclide on which a high-precision mass measurement in a Penning trap has been carried out. Together with existing data for the partial half-life as well as theoretical corrections, the decay energy yields a comparative half-life of Ft = 3084(15) s for this decay, in agreement with the mean value for the series of the lighter nuclides from 10C to 54Co. Assuming conserved vector current, this result allows for an experimental determination of the isospin-symmetry-breaking correction ?C.
 Thème(s) : Physique/Physique Nucléaire Expérimentale
 Mot(s)-clé(s) : beta-decay – nuclei with mass number 59 to 89 – nuclear mass – radioactive decay periods – nuclear isospin – spontaneous symmetry breaking – standard model
 Lien vers le texte intégral : http://cdsweb.cern.ch/record/787762
 in2p3-00139293, version 1 http://hal.in2p3.fr/in2p3-00139293 oai:hal.in2p3.fr:in2p3-00139293 Contributeur : Dominique Girod <> Soumis le : Vendredi 30 Mars 2007, 11:15:53 Dernière modification le : Vendredi 30 Mars 2007, 11:23:04