Publication Type
Journal
Journal Name
Physical Review Letters
Publication Date
Page Number
102501
Volume
117
Issue
10
Abstract
Proton radii of 12 19 C densities derived from charge changing cross section measurements at 900A
MeV with a carbon target are reported. A thick neutron surface evolves from ⇠ 0.5 fm in 15 C to ⇠
1 fm in 19 C. The halo radius in 19 C is found to be 6.4±0.7 fm as large as 11 Li. Ab initio calculations
based on chiral nucleon-nucleon and three-nucleon forces reproduce well the radii. The equation of
state of asymmetric nuclear matter (EOS) is constrained using a correlation between the radii and
the symmetry energy coefficient (S v ) and its density derivative (L) to S v = 24 - 31 MeV and L=37
- 47 MeV.
