Masses and Charge Radii of Ne17-22 and the Two-Proton-Halo Candidate Ne-17
Geithner, W Neff, T Audi, G Blaum, K × Delahaye, P Feldmeier, H George, S Guenaut, C Herfurth, F Herlert, A Kappertz, S Keim, M Kellerbauer, A Kluge, H. -J Kowalska, M Lievens, Peter Lunney, D Marinova, K Neugart, R Schweikhard, L Wilbert, S Yazidjian, C #
American Physical Society
Physical Review Letters vol:101 issue:25
High-precision mass and charge radius measurements on Ne17-22, including the proton-halo candidate Ne-17, have been performed with Penning trap mass spectrometry and collinear laser spectroscopy. The Ne-17 mass uncertainty is improved by factor 50, and the charge radii of Ne17-19 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 Ne-17 to an extended proton configuration with an s(2) component of about 40%. In Ne-18 the smaller radius is due to a significantly smaller s(2) component. The radii increase again for Ne19-22 due to cluster admixtures.