INVESTIGADORES
RIVAROLA Roberto Daniel
artículos
Título:
INvestigation of the interference effect in the case of low energy electron emission from O2 in collisions with fast bare C-ions
Autor/es:
S. NANDI; A. N. AGNIHOTRI; C. A. TACHINO; R. D. RIVAROLA; F. MARTÍN; L. C. TRIBEDI
Revista:
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Bristol; Año: 2012 vol. 45 p. 2152071 - 2152076
ISSN:
0953-4075
Resumen:
We have measured the double differential cross sections (DDCSs) for low energy electron
emission from O2 under the impact of 51 MeV bare carbon ions. This study is aimed at
investigating the Young-type interference in electron emission from a multi-electronic
diatomic molecule. The DDCS spectra, differential in emission energy and angle, are
compared with state-of-the-art continuum distorted wave-eikonal initial state (CDW-EIS)
calculations. The DDCS ratios (i.e. O2/2O) do not produce any oscillatory behaviour due to
the interference effect unlike that observed in the case of H2. The forwardbackward angular
asymmetry parameter, deduced from the measured DDCS values, is found to be a
monotonically increasing function of electron velocity and does not show any oscillation.
These observations are in qualitative agreement with the prediction of the molecular CDW-EIS
model which uses a linear combination of atomic orbitals. The apparent absence of the
oscillation in the spectra is qualitatively explained in terms of cancellation of contributions
arising from different molecular orbitals.2 under the impact of 51 MeV bare carbon ions. This study is aimed at
investigating the Young-type interference in electron emission from a multi-electronic
diatomic molecule. The DDCS spectra, differential in emission energy and angle, are
compared with state-of-the-art continuum distorted wave-eikonal initial state (CDW-EIS)
calculations. The DDCS ratios (i.e. O2/2O) do not produce any oscillatory behaviour due to
the interference effect unlike that observed in the case of H2. The forwardbackward angular
asymmetry parameter, deduced from the measured DDCS values, is found to be a
monotonically increasing function of electron velocity and does not show any oscillation.
These observations are in qualitative agreement with the prediction of the molecular CDW-EIS
model which uses a linear combination of atomic orbitals. The apparent absence of the
oscillation in the spectra is qualitatively explained in terms of cancellation of contributions
arising from different molecular orbitals.2/2O) do not produce any oscillatory behaviour due to
the interference effect unlike that observed in the case of H2. The forwardbackward angular
asymmetry parameter, deduced from the measured DDCS values, is found to be a
monotonically increasing function of electron velocity and does not show any oscillation.
These observations are in qualitative agreement with the prediction of the molecular CDW-EIS
model which uses a linear combination of atomic orbitals. The apparent absence of the
oscillation in the spectra is qualitatively explained in terms of cancellation of contributions
arising from different molecular orbitals.2. The forwardbackward angular
asymmetry parameter, deduced from the measured DDCS values, is found to be a
monotonically increasing function of electron velocity and does not show any oscillation.
These observations are in qualitative agreement with the prediction of the molecular CDW-EIS
model which uses a linear combination of atomic orbitals. The apparent absence of the
oscillation in the spectra is qualitatively explained in terms of cancellation of contributions
arising from different molecular orbitals.