Proton Distribution Radii of ^{12-19}C Illuminate Features of Neutron Halos.

Authors :: Kanungo R
Horiuchi W
Hagen G
Jansen GR
Navratil P
Ameil F
Atkinson J
Ayyad Y
Cortina-Gil D
Dillmann I
Estradé A
Evdokimov A
Farinon F
Geissel H
Guastalla G
Janik R
Kimura M
Knöbel R
Kurcewicz J
Litvinov YA
Marta M
Mostazo M
Mukha I
Nociforo C
Ong HJ
Pietri S
Prochazka A
Scheidenberger C
Sitar B
Strmen P
Suzuki Y
Takechi M
Tanaka J
Tanihata I
Terashima S
Vargas J
Weick H
Winfield JS
Source :: Physical review letters [Phys Rev Lett] 2016 Sep 02; Vol. 117 (10), pp. 102501. Date of Electronic Publication: 2016 Sep 02.
Publication Year :: 2016
Abstract: Proton radii of ^{12-19}C densities derived from first accurate 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 the radii well.