title: One-neutron knockout from individual single-particle states of 11Be
abstract: The structure of the halo nucleus 11Be has been studied using the reaction 9Be(11Be,10Be+gamma)X at 60 MeV/nucleon. The ground state structure of 11Be is determined by comparing the experimental cross sections to a calculation combining spectroscopic factors from the shell model with l-dependent single-particle cross sections obtained in an eikonal model. This experiment shows the dominant 1s single-particle character of the 11Be ground state and indicates a small contribution of 0d admixture in the wave function. After correction for the approximately 22% intensity to excited levels, a clean and precise distribution of parallel momentum for knockout from the 1s halo wave function is obtained for the first time.
authors.affiliation: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 and Gesellschaft fur Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt, Germany.
authors.initials: T
authors.lastname: Aumann
authors.initials: A
authors.lastname: Navin
authors.initials: DP
authors.lastname: Balamuth
authors.initials: D
authors.lastname: Bazin
authors.initials: B
authors.lastname: Blank
authors.initials: BA
authors.lastname: Brown
authors.initials: JE
authors.lastname: Bush
authors.initials: JA
authors.lastname: Caggiano
authors.initials: B
authors.lastname: Davids
authors.initials: T
authors.lastname: Glasmacher
authors.initials: V
authors.lastname: Guimaraes
authors.initials: PG
authors.lastname: Hansen
authors.initials: RW
authors.lastname: Ibbotson
authors.initials: D
authors.lastname: Karnes
authors.initials: JJ
authors.lastname: Kolata
authors.initials: V
authors.lastname: Maddalena
authors.initials: B
authors.lastname: Pritychenko
authors.initials: H
authors.lastname: Scheit
authors.initials: BM
authors.lastname: Sherrill
authors.initials: JA
authors.lastname: Tostevin