INVESTIGADORES
FOJON Omar Ariel
artículos
Título:
Bethe binary-encounter peaks in the double-differential cross sections for high-energy electron-impact ionization of H2 and He
Autor/es:
CHATTERJEE S; AGNIHOTRI A N; STIA C R; FOJÓN O A; RIVAROLA R D; TRIBEDI L C
Revista:
PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS
Editorial:
AMER PHYSICAL SOC
Referencias:
Año: 2010 vol. 82 p. 52709 - 52715
ISSN:
1050-2947
Resumen:
We study the Bethe binary-encounter (BE) region in the ejected-electron double-differential emission spectrum of H2
and He targets in collisions with 8-keV electrons. We compare the
absolute cross sections for these isoelectronic systems at high emission
energies. The experimental data are analyzed in terms of a
state-of-the-art theoretical model based on a two-effective-center
approximation. In the case of the H2 molecule the binary peak
in the double-differential cross sections (DDCS) is enhanced due to the
two-center Young-type interference. The observed undulation in the DDCS
ratio is explained in terms of the combined contributions of the
Compton profile mismatch and the interference effect. The influence of
the interference effect is thus observed for higher-energy electrons
compared to most of the earlier studies which focused on low-energy
electrons produced in soft collisions.