Nuclear Charge Radius of $^{12}$Be

Details Nuclear Charge Radius of $^{12}$Be Nuclear Charge Radius of $^{12}$Be

2012-02-22

arxiv.org/abs/1202.4873v2

Physics

Atomic Physics

5 pages, 3 figures

Scientific paper

The nuclear charge radius of $^{12}$Be was precisely determined using the technique of collinear laser spectroscopy on the $2s_{1/2}\rightarrow 2p_{1/2, 3/2}$ transition in the Be$^{+}$ ion. The mean square charge radius increases from $^{10}$Be to $^{12}$Be by $\delta ^{10,12} = 0.69(5) \fm^{2}$ compared to $\delta ^{10,11} = 0.49(5) \fm^{2}$ 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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