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Three gamma rays produced by bombardment of neodymium metal with protons of energies up to 3.34 Mev have been observed. Measurements indicate gamma-ray energies and isotopic identifications of 71 ±4 kev from Nd 145 , 300±3 kev from Nd 148 , and 131 ±2 kev from Nd 150 , with total cross sections for production of the last two radiations of 0.7±0.2 and 2.4±0.3 mb, respectively, for 2.25-Mev protons. Excitation functions found for the even-even iostopes agree with those predicted for E2 Coulomb interactions, leading to 0->2-\->0 level assignments; El excitation seems ruled out only for Nd 150 . The theory of Alder and Winther for E2 excitation gives only qualitative agreement with the measured 131-kev gamma-ray angular distribution. Low-energy proton bremsstrahlung were also observed.

Differential cross sections for the elastic scattering of deuterons by He 3 have been measured at laboratoryenergies of 1.02, 1.50, 2.00, 2.50, 3.00, and 3.25 Mev for nine center-of-mass angles ranging from 45° to 125°. At each deuteron energy the cross section passes through a minimum in the vicinity of 90°, with the minimum shifting to slightly higher angles as the bombarding energy increases. The cross section decreases with increasing energy for each angle investigated. At 3.25 Mev the cross section passes through a minimum of 16 millibams at 100° and rises to approximately 80 millibarns at 45° and 125°. A comparison of the results for the scattering of deuterons by He 3 and by the mirror nucleus H 3 shows the cross sections to be approximately the same except at the lowest energies and forward angles.

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