Nuclear charge radius of 12Be |
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Authors: | Krieger A Blaum K Bissell M L Frömmgen N Geppert Ch Hammen M Kreim K Kowalska M Krämer J Neff T Neugart R Neyens G Nörtershäuser W Novotny Ch Sánchez R Yordanov D T |
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Affiliation: | Institut für Kernchemie, Johannes Gutenberg-Universit?t Mainz, D-55128 Mainz, Germany. |
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Abstract: | The nuclear charge radius of (12)Be was precisely determined using the technique of collinear laser spectroscopy on the 2s(1/2)→2p(1/2,3/2) transition in the Be(+) ion. The mean square charge radius increases from (10)Be to (12)Be by δ(10,12)=0.69(5) fm(2) compared to δ(10,11)=0.49(5) fm(2) for the one-neutron halo isotope ^{11}Be. Calculations in the fermionic molecular dynamics approach show a strong sensitivity of the charge radius to the structure of ^{12}Be. The experimental charge radius is consistent with a breakdown of the N=8 shell closure. |
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