Study of three-nucleon mechanisms in the photodisintegration of 3He

G Audit,A Braghieri, N Dhose,V Isbert,S Kerhoas,J M Laget,M Mac Cormick,L Y Murphy,A Panzeri,Peter Pedroni,T Pinelli,G Tamas,J Ahrens,J R M Annand,R Crawford,P Grabmayr,S J Hall,J D Kellie

Nuclear Physics A（1997）

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摘要

The cross section of the 3He(γ,pp)n reaction has been measured for the first time over a wide photon energy and proton angular range (200 MeV ≤ Eγ ≤ 800 MeV; 20° ≤ ϑplab ≤ 160°) using the large acceptance detector DAPHNE at the tagged photon facility of the MAMI microtron in Mainz. The wide kinematical coverage of the measurement has allowed a detailed analysis of three-nucleon absorption mechanisms. A model developed by Laget explains the main characteristics of the data in the Δ resonance region.

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25.20.Dc,25.10+s,21.45.+v

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