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Phys. Rev. Lett. 94, 172501 (2005) [5 pages]

“Safe” Coulomb Excitation of 30Mg

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O. Niedermaier et al.
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Received 17 December 2004; published 4 May 2005

We report on the first radioactive beam experiment performed at the recently commissioned REX-ISOLDE facility at CERN in conjunction with the highly efficient γ spectrometer MINIBALL. Using 30Mg ions accelerated to an energy of 2.25  MeV/u together with a thin natNi target, Coulomb excitation of the first excited 2+ states of the projectile and target nuclei well below the Coulomb barrier was observed. From the measured relative deexcitation γ-ray yields the B(E2;0gs+→21+) value of 30Mg was determined to be 241(31)e2   fm4. Our result is lower than values obtained at projectile fragmentation facilities using the intermediate-energy Coulomb excitation method, and confirms the theoretical conjecture that the neutron-rich magnesium isotope 30Mg resides outside the “island of inversion.”


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.94.172501
DOI: 10.1103/PhysRevLett.94.172501
PACS: 25.70.De, 21.10.Re, 27.30.+t

* Electronic address: h.scheit@mpi-hd.mpg.de
† Electronic address: http://www.mpi-hd.mpg.de/cb/

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