Abstract
High-precision mass and charge radius measurements on , including the proton-halo candidate , have been performed with Penning trap mass spectrometry and collinear laser spectroscopy. The mass uncertainty is improved by factor 50, and the charge radii of are determined for the first time. The fermionic molecular dynamics model explains the pronounced changes in the ground-state structure. It attributes the large charge radius of to an extended proton configuration with an component of about 40%. In the smaller radius is due to a significantly smaller component. The radii increase again for due to cluster admixtures.
- Received 27 June 2008
DOI:https://doi.org/10.1103/PhysRevLett.101.252502
©2008 American Physical Society