208PB(T,D)209PB REACTION WITH 20-MEV TRITONS

Spectroscopic factors for the single-neutron states in Pb209 have been determined from angular distributions of the Pb208(t,d)Pb209 reaction. The 1.42-MeV level was found to contain only part of the j152 single-particle strength. A neutron-bound-state well which reproduces the observed level order and spacings of the positive-parity single-particle states and also gives shell-model-like spectroscopic factors is discussed. Both counter-telescope and magnetic-spectrograph techniques were employed, the latter method being used to extend the spectrum to higher excitation energies. A number of previously unreported levels in Pb209 are noted. Elastic-scattering measurements were also carried out and the resulting optical-model analysis used in distorted-wave calculations. These calculations indicate that the (t,d) reaction is insensitive to cutoff radii and to the choice of either of two sets of triton optical-model potentials which fit the elastic-scattering data. © 1969 The American Physical Society.