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27 April 2024

» pubmed » pmid11015828

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One-neutron knockout from individual single-particle states of 11Be
T Aumann ; A Navin ; D P Balamuth ; D Bazin ; B Blank ; B A Brown ; J E Bush ; J A Caggiano ; B Davids ; T Glasmacher ; V Guimaraes ; P G Hansen ; R W Ibbotson ; D Karnes ; J J Kolata ; V Maddalena ; B Pritychenko ; H Scheit ; B M Sherrill ; J A Tostevin ;
Date:	3 Jan 2000
Journal:	Phys Rev Lett, 84 (1), 35-8
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.
Source:	PubMed, pmid11015828
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