Abstract
The reactions 204Pb(d, t), 204Pb(d, p), 204Pb(d, d′) and 204Pb(t, p) were investigated at incident energies of 12–13 MeV, the reaction products being momentum analysed in a multi-angle, magnetic spectrograph. Seven excited states were observed in 203Pb up to 2.8 MeV excitation energy; 27 excited states were observed in 205Pb up to 4.1 MeV excitation energy; five excited states were identified in 204Pb up to 2.7 MeV excitation energy, and four excited states were found in 206Pb up to 3.8 MeV excitation energy. The measured angular distributions from the single transfer reactions (d, p) and (d, t) were compared with DWBA predictions, and spectroscopic factors were deduced for a number of levels. For the states of 203Pb and 205Pb near the Fermi surface and for the 204Pb ground state the results are in general agreement with the pairing model. The data suggest that the four hole-two particle strength of 206Pb is distributed over many close levels.
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