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Laser Spectroscopic Determination of the 6He Nuclear Charge Radius

L. -B. Wang·P. Mueller·K. Bailey·G. W. F. Drake·J. P. Greene·D. Henderson·R. J. Holt·R. V. F. Janssens·C. L. Jiang·Z. -T. Lu·T. P. O'Connor·R. C. Pardo·K. E. Rehm·J. P. Schiffer·X. D. Tang
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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.

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L. -B. Wang, P. Mueller, K. Bailey, G. W. F. Drake, J. P. Greene, D. Henderson, R. J. Holt, R. V. F. Janssens, C. L. Jiang, Z. -T. Lu, T. P. O'Connor, R. C. Pardo, K. E. Rehm, J. P. Schiffer, X. D. Tang. 2004-08-08. Laser Spectroscopic Determination of the 6He Nuclear Charge Radius. https://doi.org/10.1103/physrevlett.93.142501

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