Plasmon Damping in In, Cd and Graphite

Abstract

Volume-plasmon damping in In, Cd and graphite have been studied by measuring the angular dependences of the energy, the half-width and the intensity of the plasmon peaks. The angular dependence of the half-width was analyzed in the form of Γ_p=A+Bθ². As a result, it was confirmed for these elements that there were two groups in relation to the behavior of the plasmon damping as reported in our previous paper, that is, In, Cd and π-plasmon of graphite belonged to the first group in which A had relatively small values and B was positive, and π+σ-plasmon of graphite belonged to the second group in which A had relatively large value and B was negative. The plasmon energies and the dispersion coefficients were also given.