Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2008-09-15
Phys.Rev.Lett.102:062503,2009
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 2 figures calculated mass shift values have been re-evaluated with the latest mass values for the beryllium isotopes
Scientific paper
10.1103/PhysRevLett.102.062503
Nuclear charge radii of $^{7,9,10,11}$Be have been determined by high-precision laser spectroscopy. On-line measurements were performed with collinear laser spectroscopy in the $2s_{1/2} \to 2p_{1/2}$ transition on a beam of Be$^{+}$ ions. Collinear and anticollinear laser beams were used simultaneously and the absolute frequency determination using a frequency comb yielded an accuracy in the isotope-shift measurements of about 1 MHz. Combination with accurate calculations of the mass-dependent isotope shifts yield nuclear charge radii. The charge radius decreases from $^7$Be to $^{10}$Be and then increases for the halo nucleus $^{11}$Be. When comparing our results with predictions of {\it ab initio} nuclear structure calculations we find good agreement. Additionally, the nuclear magnetic moment of $^7$Be was determined to be $-1.3995(5)\mu_{\rm N}$ and that of $^{11}$Be from a previous $\beta$-NMR measurement was confirmed.
Andjelkovic Zoran
Bissell Mark L.
Blaum Klaus
Cazan Radu
Drake G. W. F.
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