%A"Miller, J [Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires]" %D1965 %I; CEA Saclay, 91 - Gif-sur-Yvette (France); Faculte des Sciences de l'Universite de Paris, Centre d'Orsay, 91 (France) %2 %J[] %K73 NUCLEAR PHYSICS AND RADIATION PHYSICS, CALCIUM 40 TARGET, CARBON 12 TARGET, CROSS SECTIONS, EXCITATION, GIANT RESONANCE, MAGNESIUM 24 TARGET, MONOCHROMATIC RADIATION, NEUTRON DETECTION, OXYGEN 16 TARGET, PARTICLE-HOLE MODEL, PHOTONUCLEAR REACTIONS, SUM RULES %PMedium: ED; Size: 76 pages %TGiant resonance and dipolar states of light nuclei; La resonance geante et les etats dipolaires des noyaux legers %XCross-section for ({gamma},n) reactions on C{sup 12},, O{sup 10}, Mg{sup 24} and Ca{sup 40} have been measured using 'monochromatic' gamma rays of variable energy obtained from the annihilation in flight of fast positrons. We compare the observed structure with the shell model of nucleus, including residual interaction between nucleons by 'hole particle' techniques. (author) [French] Les photons 'monochromatiques', d'energie variable, produits par l'annihilation en vol de positons, sont utilises pour mesurer la section efficace ({gamma},n) de {sup 12}C, {sup 16}O, {sup 21}Mg et {sup 40}Ca. La structure observee est comparee aux previsions theoriques du modele a particules independantes, tenant compte de l'interaction residuelle entre nucleons par la methode 'trou-particule'. (auteur) %0Thesis/Dissertation %NCEA-R-2736;TRN: FR05R2736017808 %1 %CFrance %Rhttps://doi.org/ TRN: FR05R2736017808 FRN %GFrench