Diffusion des neutrons de 14 MeV par le carbone 12 : États excités de 4,43 MeV, 7,66 MeV, 9,6 MeV et 10,1 MeV

Abstract

L'étude de la diffusion inélastique des neutrons de 14 MeV sur le carbone par une méthode de temps de vol, permet de donner les valeurs de la section efficace différentielle, pour les niveaux excités de 4,43 MeV, 7,66 MeV, 9,6 MeV et 10,1 MeV. L'allure de la variation de ces sections efficaces différentielles, en fonction de l'angle de diffusion, semble, tout au moins pour les deux premiers niveaux, en faveur d'une intervention de l'interaction directe

Notizen: Inelastic Scattering of 14.6 MeV Neutrons to Excited States of 12C

“…The purpose of this paper is to show the possibility of using a commercially available low temperature infrared bolometer 4 for detecting neutrals of energies down to the thermal range with a performance comparable to that of more complicated and bulky electron bombardment devices. Fig.…”

“…14.6 MeV neutrons were produced by the 3 T(d,n) 4 He reaction using a magnetically analysed beam of deuterons from the COCKCROFT-WALTON accelerator at the In stitute "Rudjer Boskovic" 8 . The emerging neutron beam was collimated by a shield with a conical collimator hole.…”

“…7 ) is different in shape and on the average larger by a factor of two. A minimum at 90° appears in the angular distribution of neutrons scattered to the 10.1 MeV level 4 . Above this excitation energy angular distributions of inelastically scattered neutrons to separate levels have not been measured.…”

“…Most of the angular distribution measurements for the 9.64 MeV level were performed at an incident neutron energy of 14.1 MeV (refs. [2][3][4][5][6] ). They all show a general decrease at large scattering angles.…”