APS » PROLA » Phys. Rev. Lett. » Volume 92 » Issue 11
< Previous article | Next article >

Phys. Rev. Lett. 92, 112501 (2004) [4 pages]

Unambiguous Identification of Three β-Decaying Isomers in 70Cu

Download: PDF (114 kB) or Buy this Article (Use Article Pack) Export: BibTeX or EndNote (RIS)

J. Van Roosbroeck et al.
Show All Authors/Affiliations

Received 12 November 2003; published 17 March 2004

Using resonant laser ionization, β-decay studies, and for the first time mass measurements, three β-decaying states have been unambiguously identified in 70Cu. 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 T1/2=33(2)   s and the 1+ isomer at 242.4(3) keV with T1/2=6.6(2)   s are confirmed by high-precision mass measurements. The low-lying levels of 70Cu populated in the decay of 70Ni 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.


©2004 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.92.112501
DOI: 10.1103/PhysRevLett.92.112501
PACS: 21.10.Dr, 07.75.+h, 27.50.+e, 32.80.Fb

* Author to whom correspondence should be addressed. Electronic address: Klaus.Blaum@CERN.ch
† Present address: Department of Physics and Astronomy, University of Aarhus, Denmark.
‡ Present address: NSCL, Michigan State University, East Lansing, 48824-1321 MI, USA.

[ Abstract  |  Previous article  |  Next article  |  Issue 11 ]