Abstract:
The Pb(\vec{γ} ,γ') photon scattering reaction has been studied with the nearly monochromatic, linearly
polarized photon beams at the High Intensity γ -ray Source (HIγ S) at the DFELL. Azimuthal scattering
intensity asymmetries measured with respect to the polarization plane of the beam have been used for
the first time to assign both the spin and parity quantum numbers of dipole excited states of 206,207,208Pb
at excitation energies in the vicinity of 5.5 MeV. Evidence for dominant particle–core coupling is deduced
from these results along with information on excitation energies and electromagnetic transition matrix
elements. Implications of the existence of weakly coupled states built on highly excited core states in
competition with 1¯hω single particle (hole) excitations at comparable energies are discussed.
Duke University * Arts & Sciences * Physics * Faculty * Staff * Grad * Researchers * Reload * Login
Copyright (c) 2001-2002 by Duke University Physics.