Nuclear Charge Radii of 10,11B
Abstract
We present the first laser spectroscopic determination of the change in the nuclear charge radius in boron isotopes. This is achieved by combining high-accuracy ab initio mass-shift calculations and a high-resolution measurement of the isotope shift in the transition frequency from the ground state to the respective excited state in boron atoms. Accuracy is increased by orders of magnitude for the stable isotopes 10,11B compared to previous measurements. The results are used to extract the difference in the mean-square charge radius <rc2>11 - <rc2>10 = - 0.49(12) fm2. This value serves as a benchmark for new ab initio nuclear structure calculations using the no-core shell model and Green's function Monte Carlo approaches. In addition, this work is the foundation for a laser spectroscopic determination of the charge radius of the proton-rich, short-lived 8B in preparation at Argonne's ATLAS facility.
This work is supported by the Deutsche Forschungsgemeinschaft under Grant 27938 4907-SFB 1245, and by the U.S. DOE, Office of Science, Office of Nuclear Physics, under contract DE-AC02-06CH11357.- Publication:
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APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..DNP.FN002M