One-neutron knockout from individual single-particle states of 11Be
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.
Aumann
T
National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 and Gesellschaft fur Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt, Germany.
Navin
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Balamuth
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Bazin
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Blank
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Brown
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Bush
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Caggiano
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Glasmacher
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Guimaraes
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Hansen
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Ibbotson
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Karnes
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Kolata
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Maddalena
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Pritychenko
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Scheit
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Sherrill
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Tostevin
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