LEVELS OF BI209 OBSERVED IN PB208 (HE3,D) REACTION

The level structure of Bi209 has been studied using the Pb208(He3, d)Bi209 reaction at 44.2 MeV. A distorted-wave-approximation analysis of angular distributions for the seven strong levels observed indicates that the following levels contain almost the full shell-model strength: g.s., 1h92; 0.90 MeV, 2f72; 1.61 MeV, 1i132; 2.83 MeV, 2f52; and 3.12 MeV, 3p32. The level at 3.64 MeV contains about two-thirds of the 3p12 strength. Our analysis did not provide a conclusive explanation for the level at 4.42 MeV. Angular distributions were also measured for three states weakly excited at 2.61, 4.52, and 4.58 MeV. A number of other states were weakly excited in the region between 3.4 and 4.4 MeV. © 1968 The American Physical Society.