The ¹²C(³He, γ₁₊₂)¹⁵O reaction in the giant dipole resonance region

Abstract

The 90" differential cross section of the 12C(3He, y, +,)lSO reaction has been measured at 3He particle energies from 5.3 to 16.7 MeV in steps varying from 100 to 300 keV. The y-rays were detected by a 23 cm long x 23 c61 diameter NaI(T1) crystal spectrometer enclosed in an anticoincidence shield. The yield curve shows a resonant behaviour at-the energies Ex = 17.56 ? 0.06, 19.02 -t 0.12,and23.80 + 0.10MeV.La section efficace diffkrentielle a 8, = 90" de la riaction 12C(3He, y, +2)150 a it6 mesurCe pour des Cnergies des particules 3He allant de 5,3 a 16,7 MeV par Ctapes variant de 100 300 keV. Les rayons y ont CtC detectis par un crystal de NaI(T1) de 23 cm de longueur et 23 cm de diamktre, entour6 d'un scintillateur plastique en anticoincidence. La courbe de rendement prisente un cornportement de risonance aux Cnergies Ex = 17,56 + 0,06, 19,02 2 0,12 et 23,80 0,10 MeV.Can. J. Phys. 67, 135 (1989)