The 206Pb(t, p)208Pb and 210Pb(p, t)208Pb reactions at 20 MeV

摘要: Abstract The 206Pb(t, p)208Pb and 210Pb(p, t)208Pb reactions have been studied at 20 MeV up to an excitation of 6.75 in the (p, t) reaction 8.5 (t, p) reaction. Angular distributions 10°-80° are observed both reactions. spin parity about thirty states tentatively identified from their angular distribution patterns by comparison cross sections measured t), p), p′), (d, Pairing-vibrational (0+) 2+) presence a proton pairing vibrational state 5.24 is suggested data. Two-neutron transfer DWBA were calculated for 50 using one-particle, one-hole wavefunctions Kuo. These characterized having appreciable parentage valence neutron particle (hole) configurations 210Pb(206Pb). Tentative identification with allows quantitative comparison. strongly populated pairing-vibrational compared calculations True Ford, Redlich 206 Pb 210Pb. Discrepancies discussed terms mixing analogs higher lying 2+ 210Pb two-particle, two-hole wavefunctions.