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 HAL : in2p3-00139278, version 1
 Physical Review Letters 92 (2004) 112501
 Unambiguous Identification of Three $\beta$-Decaying Isomers in $^{70}$Cu
 (2004)
 Using resonant laser ionization, $\beta$-decay studies, and for the first time mass measurements, three $\beta$-decaying states have been unambiguously identified in $^{70}$Cu. A mass excess of –62 976.1(1.6) keV and a half-life of 44.5(2) s for the (6$^–$) ground state have been determined. The level energies of the (3$^–$) isomer at 101.1(3) keV with $T_{1/2}$ = 33(2) s and the 1$^+$ isomer at 242.4(3) keV with $T_{1/2}$ = 6.6(2) s are confirmed by high-precision mass measurements. The low-lying levels of $^{70}$Cu populated in the decay of $^{70}$Ni and in transfer reactions compare well with large-scale shell-model calculations, and the wave functions appear to be dominated by one proton–one neutron configurations outside the closed Z = 28 shell and N = 40 subshell. This does not apply to the 1$^+$ state at 1980 keV which exhibits a particular feeding and deexcitation pattern not reproduced by the shell-model calculations.
 Thème(s) : Physique/Physique Nucléaire Expérimentale
 Mot(s)-clé(s) : nuclei with mass number 59 to 89 – nuclear isomerism – beta-decay – ground states – nuclear energy levels – wave functions – nuclear shell model
 Lien vers le texte intégral : http://cdsweb.cern.ch/record/688757
 in2p3-00139278, version 1 http://hal.in2p3.fr/in2p3-00139278 oai:hal.in2p3.fr:in2p3-00139278 Contributeur : Dominique Girod <> Soumis le : Vendredi 30 Mars 2007, 10:38:35 Dernière modification le : Vendredi 30 Mars 2007, 10:41:07