Reaction (p, d) À 156 MeV sur l'azote et le fluor et melanges de configurations dans les noyaux 13N, 14N, 18F et 19F

Abstract

The (p, d) reaction at 156 MeV on nitrogen and fluorine has been studied to test a configuration mixing description of the target and residual nuclei, and the single interaction pick-up mechanism. At this energy, a simple method is used to extract the relative spectroscopic factors for a given l for the whole spectrum. The comparison has been made using spectroscopic factors calculated for nitrogen and fluorine with wave functions of Ripka and Giraud, and with the 1p wave functions of Cohen and Kurath for nitrogen. For nitrogen there is a good agreement between experimental and theoretical spectroscopic factors, especially when comparing with those calculated by Kurath where agreement is within about 20%. Such an agreement has also been obtained for other nuclei of the 1p shell. For fluoribe, the theoretical description seems qualitatively correct up to about 5 MeV excitation in 18F. Excitation of the observed higher states must be assigned to pick-up in the inner 1p shell or to the contribution of more complex configurations.