title: Proton radii of (12-17)B define a thick neutron surface in ¹⁷B.
abstract: The first determination of radii of point proton distribution (proton radii) of (12-17)B from charge-changing cross sections (σ(CC)) measurements at the FRS, GSI, Darmstadt is reported. The proton radii are deduced from a finite-range Glauber model analysis of the σ(CC). The radii show an increase from ¹³B to ¹⁷B and are consistent with predictions from the antisymmetrized molecular dynamics model for the neutron-rich nuclei. The measurements show the existence of a thick neutron surface with neutron-proton radius difference of 0.51(0.11) fm in ¹⁷B.
authors.affiliation: Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3 H 3C3, Canada and GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Estradé
authors.affiliation: Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3 H 3C3, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Kanungo
authors.affiliation: Department of Physics, Hokkaido University, Sapporo 060-0810, Japan.
authors.forename: W
authors.initials: W
authors.lastname: Horiuchi
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Ameil
authors.affiliation: Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3 H 3C3, Canada.
authors.forename: J
authors.initials: J
authors.lastname: Atkinson
authors.affiliation: Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain.
authors.forename: Y
authors.initials: Y
authors.lastname: Ayyad
authors.affiliation: Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain.
authors.forename: D
authors.initials: D
authors.lastname: Cortina-Gil
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: I
authors.initials: I
authors.lastname: Dillmann
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Evdokimov
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Farinon
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany and Justus-Liebig University, 35392 Giessen, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Geissel
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Guastalla
authors.affiliation: Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia.
authors.forename: R
authors.initials: R
authors.lastname: Janik
authors.affiliation: Department of Physics, Hokkaido University, Sapporo 060-0810, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kimura
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Knöbel
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Kurcewicz
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: Yu A
authors.initials: YA
authors.lastname: Litvinov
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Marta
authors.affiliation: Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Mostazo
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: I
authors.initials: I
authors.lastname: Mukha
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Nociforo
authors.affiliation: RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan.
authors.forename: H J
authors.initials: HJ
authors.lastname: Ong
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Pietri
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Prochazka
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany and Justus-Liebig University, 35392 Giessen, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Scheidenberger
authors.affiliation: Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia.
authors.forename: B
authors.initials: B
authors.lastname: Sitar
authors.affiliation: Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia.
authors.forename: P
authors.initials: P
authors.lastname: Strmen
authors.affiliation: Department of Physics, Niigata University, Niigata 950-2181, Japan and RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Suzuki
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Takechi
authors.affiliation: RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Tanaka
authors.affiliation: RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan and School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, People's Republic of China.
authors.forename: I
authors.initials: I
authors.lastname: Tanihata
authors.affiliation: School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, People's Republic of China.
authors.forename: S
authors.initials: S
authors.lastname: Terashima
authors.affiliation: Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Vargas
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Weick
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: J S
authors.initials: JS
authors.lastname: Winfield