INVESTIGADORES
RIVAROLA Roberto Daniel
artículos
Título:
Interferences in the photoelectron spectrum of H2+ molecules at high energy
Autor/es:
O. A. FOJÓN, A. PALACIOS, J. FERNÁNDEZ, R. D. RIVAROLA Y F. MARTÍN
Revista:
PHYSICS LETTERS A
Editorial:
Elsevier B. V.
Referencias:
Año: 2006 vol. 350 p. 371 - 374
ISSN:
0375-9601
Resumen:
We present a theoretical study of ground state H2+ ionization by photons of a few hundreds of eV. Bound and continuum states are obtained by using B-spline basis functions. As predicted by Cohen and Fano [H.D. Cohen, U. Fano, Phys. Rev. 150 (1966) 30], the calculated photoelectron spectrum reveals the existence of interference effects that result from the coherent emission in the presence of the two nuclei. We show, however, that one of the basic asumptions of the Cohen-Fano model, namely, the validity of the LCAO approximation to describe the initial ground state or the free wave description of the ejected electron, is not fulfilled, which leads to an "anomalous" oscillatory behavior not pointed out in previous works.