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23 April 2024

» pubmed » pmid15904214

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Measurement of helicity-dependent photoabsorption cross sections on the neutron from 815 to 1825 MeV
H Dutz ; K Helbing ; J Krimmer ; T Speckner ; G Zeitler ; J Ahrens ; S Altieri ; J R M Ann ; G Anton ; H-J Arends ; R Beck ; A Bock ; C Bradtke ; A Braghieri ; W v Drachenfels ; F Frommberger ; M Godo ; S Goertz ; P Grabmayr ; S Hasegawa ; K Hansen ; J Harmsen ; E Heid ; W Hillert ; H Holvoet ; N Horikawa ; T Iwata ; L Van Hoorebeke ; N d’Hose ; P Jennewein ; B Kiel ; F Klein ; R Kondratiev ; M Lang ; B Lannoy ; R Leukel ; V Lisin ; D Menze ; W Meyer ; T Michel ; J Naumann ; A Panzeri ; P Pedroni ; T Pinelli ; I Preobrajenski ; E Radtke ; G Reicherz ; C Rohlof ; T Rostomyan ; M Sauer ; B Schoch ; M Schumacher ; G Tamas ; A Thomas ; R van de Vyver ; W Weihofen ; F Zapadtka ; ;
Date:	29 Apr 2005
Journal:	Phys Rev Lett, 94 (16), 162001
Abstract:	Helicity-dependent total photoabsorption cross sections on the deuteron have been measured for the first time at ELSA (Bonn) in the photon energy range from 815 to 1825 MeV. Circularly polarized tagged photons impinging on a longitudinally polarized LiD target have been used together with a highly efficient 4pi detector system. The data around 1 GeV are not compatible with predictions from existing multipole analyses. From the measured energy range an experimental contribution to the GDH integral on the neutron of [33.9 +/- 5.5(stat) +/- 4.5(syst)] microb is extracted.
Source:	PubMed, pmid15904214
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