IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
CDW-EIS calculations for multiple
Autor/es:
C. C. MONTANARI; E. C. MONTENEGRO; J. E. MIRAGLIA
Revista:
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2010 vol. 43 p. 165201 - 1652010
ISSN:
0953-4075
Resumen:
We present theoretical single to quintuple ionization cross sections for Ne, Ar, Kr and Xe
bombarded by H+ and He+. Post-collisional contributions due to Auger-like processes are
taken into account using recent photoionization data. The present continuum distorted
wave-eikonal initial state (CDW-EIS) and first Born approximation results are compared with
the experimental data available in the energy range of 5010 000 keV amu−1 for H+ on Ne and
Ar, and 501000 keV amu−1 for the other cases. In general, the combination of the CDW-EIS
with the post-collisional branching ratios describes well the multiple ionization data above
300 keV amu−1, showing a clear tendency to coalesce with the first Born approximation at
high energies. The surprising result of this work is the good performance of the first Born
approximation which describes rather well the experimental data of double and triple
ionization, even in the intermediate energy range (50300 keV amu−1), where direct ionization
is the dominant contribution.+ and He+. Post-collisional contributions due to Auger-like processes are
taken into account using recent photoionization data. The present continuum distorted
wave-eikonal initial state (CDW-EIS) and first Born approximation results are compared with
the experimental data available in the energy range of 5010 000 keV amu−1 for H+ on Ne and
Ar, and 501000 keV amu−1 for the other cases. In general, the combination of the CDW-EIS
with the post-collisional branching ratios describes well the multiple ionization data above
300 keV amu−1, showing a clear tendency to coalesce with the first Born approximation at
high energies. The surprising result of this work is the good performance of the first Born
approximation which describes rather well the experimental data of double and triple
ionization, even in the intermediate energy range (50300 keV amu−1), where direct ionization
is the dominant contribution.−1 for H+ on Ne and
Ar, and 501000 keV amu−1 for the other cases. In general, the combination of the CDW-EIS
with the post-collisional branching ratios describes well the multiple ionization data above
300 keV amu−1, showing a clear tendency to coalesce with the first Born approximation at
high energies. The surprising result of this work is the good performance of the first Born
approximation which describes rather well the experimental data of double and triple
ionization, even in the intermediate energy range (50300 keV amu−1), where direct ionization
is the dominant contribution.−1 for the other cases. In general, the combination of the CDW-EIS
with the post-collisional branching ratios describes well the multiple ionization data above
300 keV amu−1, showing a clear tendency to coalesce with the first Born approximation at
high energies. The surprising result of this work is the good performance of the first Born
approximation which describes rather well the experimental data of double and triple
ionization, even in the intermediate energy range (50300 keV amu−1), where direct ionization
is the dominant contribution.−1, showing a clear tendency to coalesce with the first Born approximation at
high energies. The surprising result of this work is the good performance of the first Born
approximation which describes rather well the experimental data of double and triple
ionization, even in the intermediate energy range (50300 keV amu−1), where direct ionization
is the dominant contribution.−1), where direct ionization
is the dominant contribution.