Alpha Particle Groups from the Deuteron Bombardment on O¹⁶ and Ca⁴⁰

Abstract

Calcium oxide targets were bombarded with 15.14-MeV deuterons from the INS cyclotron. Alpha-particle spectra were obtained at angles of 45°, 60° and 90° by means of a broad range magnetic spectrograph. In the 45° and 60° spectra none of the alpha-particle groups corresponding to T =1 levels in N 14 up to an excitation of l0 MeV was observed with an appreciable intensity with the only exception of the alpha-particle group leading to the 9.17-MeV level. In the 90° spectrum, however, alpha-particle groups leading to some of the T =1 levels in N 14 were observed evidently. Alpha-particle groups leading to somewhat doubtful levels in N 14 , i.e., 6.05-, 6.70-, 7.40- and 7.60-MeV levels were not observed with appreciable intensities in all the spectra. Alpha-particle groups from the Ca 40 ( d , α) K 38 reaction leading to several levels in K 38 below 4-MeV excitation and some He 3 groups from the Ca 40 ( d , He 3 ) K 39 reaction leading to the lowest levels in K 39 were observed.