No abstract available

[en] Using a split-pole magnetic spectrograph, the ⁴⁵Sc(α, d)⁴⁷Ti reaction was studied at E (α) =25 MeV and with a range of angles from 7degree to 50degree. These measurements are compared with results we obtained using the ⁴⁵Sc(³He, p)⁴⁷Ti reaction. One result of this comparison is the identification of candidates for states with high spin. The major emphasis of this paper is the study of such states. Two-particle spectroscopic amplitudes are calculated using an (f₇/₂)⁷ model, assuming an inert ⁴⁰Ca core. Zero-range distorted-wave Born-approximation calculations are then performed with these amplitudes. A comparison between these shell-model calculations and the experimental results indicates that the states at 4.506 and 3.583 MeV have J/sup pi/'s of 19/2^- and 17/2^-. A second result of the comparison between the (α, d) and (³He, p) reactions concerns the nature of the 3.22-MeV state in ⁴⁷Ti. It is strongly populated with an orbital angular momentum transfer of 0 by the (³He, p) reaction and only weakly populated by the (α, d) reaction, suggesting that it is formed by the transfer of a neutron-proton pair with S=0, T=1. This is similar to the transfer forming the state at 7.346 MeV, the analog of the ⁴⁷Sc ground state

[en] The compound nucleus reaction ⁴⁵Sc(α,npγ)⁴⁷Ti was used to confirm the high spins of states, observed previously in the (α,d) reaction, by studying their γ decay. Measurements of γ-γ coincidences, γ-ray excitation functions, and γ-ray angular distributions for several target thicknesses have been performed. These measurements allowed us to determine the energies and the spins for some of the observed levels, as well as the branching ratios and the multipolarities for the emitted γ rays. Lifetimes for a few states were deduced from the Doppler shifts which were exhibited in the angular distributions. Shell-model calculations were made assuming an inert ⁴⁰Ca core and all active nucleons in the 1f₇/₂ shell. Agreement between the measured and calculated branching ratios and multipolarities is excellent for all the yrast levels, and even the lifetimes of these states are predicted rather well by the theory. For two other levels, at 2.684- and 3.289-MeV energy, disagreement between the measured and calculated γ decay is observed. The lifetime of the lower of these two states was found to be unusually slow for an M1 transition. This result suggests that perhaps the earlier spin assignments for both states are wrong. For the 2.684-MeV state a spin of either 7/2⁺ or 11/2⁺ is in agreement with all the available experimental data

[en] The results of experiments performed at Argonne to determine absolute differential and total cross sections for outgoing protons, α particles and neutrons in deuteron-induced reactions on ⁶Li at energies between approximately 0.1 and 1.0 MeV are summarized. Discussion of the observed angular and energy distributions in connection with nuclear-reaction mechanisms and thermonuclear reaction rates is presented

[en] The ⁴⁸Ti(³He, t)⁴⁸V reaction has been studied at an incident energy of E₃/sub He⁺⁺/ = 25 MeV with a split-pole magnetic spectrograph. A total of 35 levels in ⁴⁸V have been identified below an excitation energy of 3.05 MeV. Angular distributions have been measured for many levels and analyzed by means of the distorted-wave Born approximation. Definite L-transfer value assignments have been made for many levels. Combining these results with previous work, spin assignments for some levels have been deduced. These results are compared with the predictions of a recent shell-model calculation which assumed a (πf/sub ⁷/₂/)³(ν/sub ⁷/₂/)/sup -3/ configuration. The isobaric analog of the ⁴⁸Ti ground state was located at an excitation energy of 3021 plus-or-minus 10 keV, in good agreement with previous results

[en] Absolute cross sections for (d,n), (d,p), and (d,α) reactions initiated by approx.0.1 to approx.1.0 MeV deuterons on ⁶Li have been obtained. Total reaction cross sections, with absolute accuracies of 8--13 %, as well as measured differential cross sections are presented. The experimental procedures are discussed and a comparison with previous results is given

No abstract available

[en] Cross sections have been measured for the production of prompt nuclear γ rays in the pion bombardment of Al, Ca, V, and ⁶⁰Ni. Several disagreements with values in the literature are noted

[en] γ-ray spectra have been observed following the interaction of 220-MeV π⁺ and π^- and 200-MeV protons with ⁵⁸Ni and ⁶⁰Ni and 100-MeV π⁺ with ⁵⁸Ni. Product nuclides have been identified from characteristic γ-ray lines corresponding to total cross sections of approx.500 mb. The systematic trends with projectile and energy are explored; rather substantial differences are found between pions and protons