期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.132502
关键词
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资金
- German Federal Ministry for Education and Research [06 MZ 962 I, 06 MZ 175]
- European Union [506065]
- OSCT Belgium [P5-07]
- FWO-Vlaanderen
The electric quadrupole moment and the magnetic moment of the Li-11 halo nucleus have been measured with more than an order of magnitude higher precision than before, vertical bar Q vertical bar = 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 Li-9. 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.
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