CERN Accelerating science

Article
Report number	nucl-ex/0412037 ; CERN-PH-EP-2004-075
Title	"Safe" Coulomb Excitation of $^{30}$Mg
Author(s)	Niedermaier, O. (Heidelberg, Max Planck Inst.) ; Scheit, H. (Heidelberg, Max Planck Inst.) ; Bildstein, V. (Heidelberg, Max Planck Inst.) ; Boie, H. (Heidelberg, Max Planck Inst.) ; Fitting, J. (Heidelberg, Max Planck Inst.) ; von Hahn, R. (Heidelberg, Max Planck Inst.) ; Kock, F. (Heidelberg, Max Planck Inst.) ; Lauer, M. (Heidelberg, Max Planck Inst.) ; Pal, U.K. (Heidelberg, Max Planck Inst.) ; Podlech, H. (Heidelberg, Max Planck Inst.) ; Repnow, R. (Heidelberg, Max Planck Inst.) ; Schwalm, D. (Heidelberg, Max Planck Inst.) ; Alvarez, C. (Munich U.) ; Ames, F. (Munich U.) ; Bollen, G. (Munich U.) ; Emhofer, S. (Munich U.) ; Habs, D. (Munich U.) ; Kester, O. (Munich U.) ; Lutter, R. (Munich U.) ; Rudolph, K. (Munich U.) ; Pasini, M. (Munich U.) ; Thirolf, P.G. (Munich U.) ; Wolf, B.H. (Munich U.) ; Eberth, J. (Cologne U.) ; Gersch, G. (Cologne U.) ; Hess, H. (Cologne U.) ; Reiter, P. (Cologne U.) ; Thelen, O. (Cologne U.) ; Warr, N. (Cologne U.) ; Weisshaar, D. (Cologne U.) ; Aksouh, F. (Leuven U.) ; Van den Bergh, P. (Leuven U.) ; Van Duppen, P. (Leuven U.) ; Huyse, M. (Leuven U.) ; Ivanov, O. (Leuven U.) ; Mayet, P. (Leuven U.) ; Van de Walle, J. (Leuven U.) ; Aysto, J. (CERN) ; Butler, P.A. (CERN) ; Cederkall, J. (CERN) ; Delahaye, P. (CERN) ; Fynbo, H.O.U. (CERN) ; Fraile, L.M. (CERN) ; Forstner, O. (CERN) ; Franchoo, S. (CERN) ; Koster, U. (CERN) ; Nilsson, T. (CERN) ; Oinonen, M. (CERN) ; Sieber, T. (CERN) ; Wenander, F. (CERN) ; Pantea, M. (Darmstadt, Tech. Hochsch.) ; Richter, A. (Darmstadt, Tech. Hochsch.) ; Schrieder, G. (Darmstadt, Tech. Hochsch.) ; Simon, H. (Darmstadt, Tech. Hochsch.) ; Behrens, T. (Munich, Tech. U.) ; Gernhauser, R. (Munich, Tech. U.) ; Kroll, T. (Munich, Tech. U.) ; Krucken, R. (Munich, Tech. U.) ; Munch, M. (Munich, Tech. U.) ; Davinson, T. (Edinburgh U.) ; Gerl, J. (Darmstadt, GSI) ; Huber, G. (Mainz U., Inst. Phys. ; Liverpool U.) ; Hurst, A. (Mainz U., Inst. Phys. ; Liverpool U.) ; Iwanicki, J. (Warsaw U., Heavy Ion Lab) ; Jonson, B. (Chalmers U. Tech.) ; Lieb, P. (Gottingen U.) ; Liljeby, L. (Siegbahn Inst. Phys., Stockholm) ; Schempp, A. (Frankfurt U.) ; Scherillo, A. (Cologne U. ; Laue-Langevin Inst.) ; Schmidt, P. (Mainz U., Inst. Phys.) ; Walter, G. (Strasbourg, IReS)
Affiliation	(CERN)
Publication	2005
Imprint	20 Dec 2004
Number of pages	10
In:	Phys. Rev. Lett. 94 (2005) 172501
DOI	10.1103/PhysRevLett.94.172501
Subject category	Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN ISOLDE ; IS347 CERN ISOLDE ; IS410
Abstract	We report on the first radioactive beam experiment performed at the recently commissioned REX-ISOLDE facility at CERN in conjunction with the highly efficient gamma spectrometer MINIBALL. Using 30Mg ions accelerated to an energy of 2.25 MeV/u together with a thin nat-Ni 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 de-excitation gamma ray yields the B(E2: 0+ -> 2+) value of 30Mg was determined to be 241(31) e2fm4. 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 lies still outside the ``island of inversion''.

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