Article révisé par les pairs
Résumé : The surface delta interaction has been applied in a calculation of the odd-mass isotopes of Ni and Pb and of the nucleus 211At. Exact shell-model calculations have been performed in all cases except for lead isotopes containing more than three holes (203Pb-197Pb). The Bogoliubov-Valatin method combined with the Tamm-Dancoff approximation in the subset of one-and three-quasiparticle configurations has also been used. The comparison between the results obtained in those two ways shows that the quasiparticle method works rather well. The agreement with experiment is quite good in general and is comparable with that achieved with more complicated interactions. The exact wave functions have been analysed in terms of the coupling of a particle or a hole to the ground state of the neighbouring nuclei with only two particles or holes outside closed shells. Finally the theoretical spectroscopic factors of the reactions 58Ni(d, p) 59Ni, 206Pb (d, t) 205Pb and 206Pb (p, d) 205Pb have been studied in connection with this analysis and compared with the experimental results and calculations by other authors. © 1970.