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A triple-coincidence counter telescope consisting of two proportional dE counters and a solid-state E detector was used to study the angular distributions of tritons and deuterons for the ground-state transitions of N 14 induced by 14.7-MeV neutrons. The relative triton-to-deuteron peak yield was found to be about 0.3. The (n,t) angular distribution is compared with pickup theory and with two other deuteron-transfer interactions between the ground states of N 14 and C 12 : the N 14 (a, Li 6 ) and N 14 (d,a) reactions. In these reactions the orbital angular momentum of the picked-up deuteron is principally L -2, with a smaller contribution from £=0 pickup suggested by the data. In addition, the W 4 (n,d) angular distribution is compared with the Gaussian-cutoff pickup theory, and with the N 14 (p,d) reaction to the ground state of the mirror nucleus N 13 . The angular distributions, absolute magnitudes, and reduced widths of the two reactions are nearly identical, as expected. Cluster-model interpretations of the N 14 data are discussed. 157

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A nuclear-physics laboratory course of one-quarter duration involving the extensive use of a high-flux neutron generator is described. The generator's characteristics make it a reliable and relatively inexpensive nuclear-physics tool for instructional purposes. Nine typical experiments from the wide range of student investigations possible are discussed. An introduction to present research efforts with the generator is an integral part of the laboratory experience.

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