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The earlier preliminary assignment of a 1,055 +_6 keV proton line to direct proton decay of a47Tm is supported by cross bombardment measurements and by a negative result from a p0sitron-proton coincidence experiment. The half-life was remeasured to be 0.56 +0.04 s. For two types of thermal ion sources, overall efficiencies were estimated for on-line mass separation of known short-lived isotopes of promethium, europium, terbium, and holmium. Direct proton decay was searched for among very neutron-deficient isotopes of these elements, and of iodine and caesium. No evidence for direct proton decay was found. Based on estimated overall efficiencies, on calculated cross-sections, and on predictions from the gross-theory of fl decay, half-life limits for direct proton decay were deduced.

In this work (p, d) reactions on 5RNi were studied, initiated by 24.6MeV polarised protons and leading to several final states in 57Ni. The cross sections and analysing powers obtained experimentally were compared with DWBA and cc calculations, confirming spin and parity assignments. Two-step transitions (p, p')(p', d') were found to contribute substantially to some of the transitions.NUCLEAR REACTIONS 5XNi(polarised p, d), (polarised p, d'), E = 24.6 MeV; measured a(Ed', e), A(Ed', 0); deduced J , R. DWBA, CRC calculations; two-step processes.

We have studied the (p, d) reaction on 56Fe, initiated by a 24.6 MeV polarised proton beam. Cross sections and analysing powers were obtained for nine states in the final nucleus 55Fe. These were compared with DWBA and CRC calculations, confirming spin and parity assignments. As opposed to the situation in 58Ni(~, d) no large two-step contributions were necessary for obtaining agreement with calculations.NUCLEAR REACTIONS 56Fe(polarised p, d), (polarised p. d'), E = 24.6 MeV; measured o(Ed', e), A ( E d ' , e); deduced J , n. DWBA, CRC calculations; no important two-step reactions.