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Nuclear Charge Radii of $^{7,9,10}Be$ and the one-neutron halo nucleus $^{11}Be

The nuclear charge radii of $^{7,9,10,11}$Be have been determined by high-precision laser spectroscopy. On-line measurements were performed at ISOLDE with collinear laser spectroscopy in the $2s_{1/2} \to 2p_{1/2}$ transition of Be$^{+}$. Simultaneous measurements in collinear and anti-collinear dir...

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Detalles Bibliográficos
Autores principales: Nortershauser, W., Tiedemann, D., Zakova, M., Andjelkovic, Z., Blaum, K., Bissell, M.L., Cazan, R., Drake, G.W.F., Geppert, Ch., Kowalska, M., Kramer, J., Krieger, A., Neugart, R., Sanchez, R., Schmidt-Kaler, F., Yan, Z.-C., Yordanov, D.T., Zimmermann, C.
Lenguaje:eng
Publicado: 2008
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.102.062503
http://cds.cern.ch/record/1127143
Descripción
Sumario:The nuclear charge radii of $^{7,9,10,11}$Be have been determined by high-precision laser spectroscopy. On-line measurements were performed at ISOLDE with collinear laser spectroscopy in the $2s_{1/2} \to 2p_{1/2}$ transition of Be$^{+}$. Simultaneous measurements in collinear and anti-collinear direction combined with absolute frequency determination using a frequency comb yielded accuracy in the isotope shift measurements of better than 1 MHz. Combined with accurate calculations of the mass-dependent isotope shifts the nuclear charge radii along the isotopic chain were extracted. 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 1.3998(15) $\mu_{\rm N}$ and that of $^{11}$Be was confirmed with an accuracy similar to previous $\beta$-NMR measurements.