Laser Spectroscopic Determination of the 6He Nuclear Charge Radius

Abstract

We have performed precision laser spectroscopy on individual 6He (t1/2 = 0.8 s) atoms confined and cooled in a magneto-optical trap, and measured the isotope shift between 6He and 4He to be 43,194.772 +/- 0.056 MHz for the 2 3S1 - 3 3P2 transition. Based on this measurement and atomic theory, the nuclear charge radius of 6He is determined, for the first time in a method independent of nuclear models, to be 2.054 +/- 0.014 fm. The result is compared with the values predicted by a number of nuclear structure calculations, and tests their ability to characterize this loosely bound, halo nucleus.

References in corpus (7)

• Quantum Monte Carlo Calculations of $A\le 6$ Nuclei
• Quantum Monte Carlo Calculations of Light Nuclei
• Realistic models of pion-exchange three-nucleon interactions
• Quantum Monte Carlo calculations of $A=9,10$ nuclei
• On the rms-radius of the proton
• The neutron halo of ${}^6$He in a microscopic model
• Microscopic multicluster description of the neutron-rich helium isotopes

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