Ionization of extended image states in carbon nanotubes by electron impact

G.A. BOCAN; N.R. ARISTA; J.L. GERVASONI; S. SEGUÍ

Freiburg, Alemania

Conferencia; XXV International conference on photonic, electronic and atomic collisions; 2007

ICPEAC

We present a first theoretical approach to the subject of ionization of electrons occupying an image state around a metallic nanotube. Making use of the image electron wave function as presented by Granger {\it et al}. [Phys. Rev. Lett. {\bf 89}, 135506 (2002)], and performing a first order Born approximation for the transition matrix, differential cross sections are obtained and discussed. Various situations are considered incluiding different projectile velocities, ejection directions and angular momenta of the image state. Both fixed and integrated solid angle energy spectra are portrayed and analyzed. Also, total ionization cross sections are calculated and depicted as a function of the projectile velocity.