Quadrupole moment of 11Li

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Abstract

The quadrupole coupling constants of 11Li and 9Li in LiNBO3 have been measured by β-NMR spectroscopy on implanted lithium nuclei. These were polarized by optical pumping on a fast beam of neutral atoms. The deduced ratio of quadrupole moments, |Q(11Li)/Q(9Li)|=1.14(16), is in accordance with the current models describing the 11Li nucleus as being clustered into a 9Li core and halo of two loosely bound neutrons.

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    Citation Excerpt :

    The charge radius is found to decrease monotonically from 6Li to 9Li and then increases again for 11Li to a size in between that of 6Li and 7Li. These data represent a challenge for nuclear theory to describe all nuclear ground-state properties consistently by the very same nuclear model: matter radius [17,18], charge radius [6,15], spin and nuclear magnetic moment [19,20], and quadrupole moment [21,22]. Fig. 3 shows the GSI accelerator facility together with the Highly Charged Ion TRAP (HITRAP) facility which is presently under construction at GSI.

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1

Present address: Heraeus Noblelight, W-6450 Hanau, FRG.

2

Present address: CERN, CH-1211 Geneva 23, Switzerland.

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