New determinations of gamma-ray line intensities of the EP= 550 and 1747 keV resonances of the 13C(p, γ)14N reaction

Abstract Gamma-ray angular distributions for the resonances at E p =550 and 1747 keV of the radiative capture reaction 13 C(p,γ) 14 N have been measured, using intense proton beams on isotopically pure 13 C targets. Experimental gamma-ray spectra were obtained with three HP–Germanium detectors at four angles for E p =550 keV and six angles for E p =1747 keV in the range of 0–90° with respect to the proton beam. From the data, relative intensities for the strongest transitions were extracted with an accuracy of typically 5%, making these resonances new useful gamma-ray standards for efficiency calibration in the energy range from E γ =1.6–9 MeV. Gamma-ray branching ratios were obtained for several levels of 14 N and are compared with literature values.