Low-energy Coulomb excitation of neutron-rich zinc isotopes

Journal Article · Thu Jan 15 00:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.014309· OSTI ID:21202702

Walle, J van de ^[1]; Aksouh, F ^[1]; Behrens, T; Gernhauser, R; Kroell, T; Kruecken, R ^[2]; Bildstein, V ^[2]; Blazhev, A; Eberth, J; Jolie, J; Reiter, P; Warr, N; Weisshaar, D ^[3]; Cederkaell, J; Delahaye, P; Fedosseev, V N; Franchoo, S; Marsh, B A; Sieber, T; Voulot, D ^[4]

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1. Instituut voor Kern-en Stralingsfysica, K. U. Leuven, Leuven (Belgium)
2. Physik Department E12, Technische Universitaet Muenchen, Garching (Germany)
3. Institut fuer Kernphysik, Universitaet Koeln, Koeln (Germany)
4. ISOLDE, CERN, Geneva (Switzerland)

At the radioactive ion beam facility REX-ISOLDE, neutron-rich zinc isotopes were investigated using low-energy Coulomb excitation. These experiments have resulted in B(E2,2{sub 1}{sup +}{yields}0{sub 1}{sup +}) values in {sup 74-80}Zn, B(E2,4{sub 1}{sup +}{yields}2{sub 1}{sup +}) values in {sup 74,76}Zn and the determination of the energy of the first excited 2{sub 1}{sup +} states in {sup 78,80}Zn. The zinc isotopes were produced by high-energy proton- (A=74,76,80) and neutron- (A=78) induced fission of {sup 238}U, combined with selective laser ionization and mass separation. The isobaric beam was postaccelerated by the REX linear accelerator and Coulomb excitation was induced on a thin secondary target, which was surrounded by the MINIBALL germanium detector array. In this work, it is shown how the selective laser ionization can be used to deal with the considerable isobaric beam contamination and how a reliable normalization of the experiment can be achieved. The results for zinc isotopes and the N=50 isotones are compared to collective model predictions and state-of-the-art large-scale shell-model calculations, including a recent empirical residual interaction constructed to describe the present experimental data up to 2004 in this region of the nuclear chart.

• OSTI ID: 21202702
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 79, Issue 1; Other Information: DOI: 10.1103/PhysRevC.79.014309; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COLLECTIVE MODEL
CONTAMINATION
COULOMB EXCITATION
E2-TRANSITIONS
FISSION
FORECASTING
GE SEMICONDUCTOR DETECTORS
IONIZATION
ISOTONIC NUCLEI
ISOTOPE PRODUCTION
LASER RADIATION
LINEAR ACCELERATORS
MASS
NEUTRON-RICH ISOTOPES
NEUTRONS
PROTONS
RADIOACTIVE ION BEAMS
RESIDUAL INTERACTIONS
SHELL MODELS
URANIUM 238
ZINC 74
ZINC 75
ZINC 76
ZINC 77
ZINC 78
ZINC 79
ZINC 80