Hyperfine structure constant of the neutron halo nucleus (11)Be(+).
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The hyperfine splittings of ground state Be+11 have been measured precisely by laser-microwave double resonance spectroscopy for trapped and laser cooled beryllium ions. The ions were produced at relativistic energies and subsequently slowed down and trapped at mK temperatures. The magnetic hyperfine structure constant of Be+11 was determined to be A11=-2677.302988(72)MHz from the measurements of the mF-mF'=0-0 field independent transition. This measurement provides essential data for the study of the distribution of the halo neutron in the single neutron halo nucleus Be11 through the Bohr-Weisskopf effect.
author list (cited authors)
Takamine, A., Wada, M., Okada, K., Sonoda, T., Schury, P., Nakamura, T., ... Schuessler, H. A.