Quasifree Compton Scattering from the Deuteron and Nucleon Polarizabilities

Cross sections for quasifree Compton scattering from the deuteron were measured for incident energies of E_γ = 236–260MeV at the laboratory angle θ_γ^′ = -135°. The recoil nucleons were detected in a liquid-scintillator array situated at θ_N = 20°. The measured differential cross sections were used, with the calculations of Levchuk et al., to determine the polarizabilities of the bound nucleons. For the bound proton, the extracted values were consistent with the accepted value for the free proton. Combining our results for the bound neutron with those from Rose et al., we obtain 1-sigma constraints of α̅ _n = 7.6–14.0 and β̅ _n = 1.2–7.6.