Precision Measurement of 11Li moments: Influence of Halo Neutrons on the 9Li Core

Abstract

The electric quadrupole moment and the magnetic moment of the 11Li halo nucleus have been measured with more than an order of magnitude higher precision than before, |Q| = 33.3(5)mb and mu=3.6712(3)mu_N, revealing a 8.8(1.5)% increase of the quadrupole moment relative to that of 9Li. This result is compared to various models that aim at describing the halo properties. In the shell model an increased quadrupole moment points to a significant occupation of the 1d orbits, whereas in a simple halo picture this can be explained by relating the quadrupole moments of the proton distribution to the charge radii. Advanced models so far fail to reproduce simultaneously the trends observed in the radii and quadrupole moments of the lithium isotopes.

4 pages, 4 figures, 1 table

Cited by in corpus (14)

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• Laser Spectroscopy for the Study of Exotic Nuclei
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• Living on the edge of stability, the limits of the nuclear landscape
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• Fine and hyperfine splitting of the 2P state in Li and Be${}^{+}$
• Study of the nucleon radiative captures 8Li(n,gamma)9Li, 9Be(p,gamma)10B, 10Be(n,gamma)11Be, 10B(p,gamma)11C, and 16O(p,gamma)17F at thermal and astrophysical energies
• Few-body structures in the mirror nuclei, ${}^{11}$O and ${}^{11}$Li
• Instrumentation for high-resolution laser spectroscopy at the ALTO radioactive-beam facility
• Accurate determination of ${}^{6,7}$Li nuclear magnetic moments
• Role of resonances in the 8li(p,g)9be capture on reaction rate of the relevant astrophysical synthesis of 9be
• Important Influence of Entrance Channel Reorientation Coupling on Proton Stripping
• High-accuracy liquid-sample $\beta$-NMR setup at ISOLDE