
Please consult the original publications when using
these data. 
H Projectiles
Process 
File 
Source 
H + He 
H_He.txt 
'Collisions of keVenergy H
atoms with the rare gases: Absolute differential cross sections
at small angles' Phys. Rev. A 40 4914 (1989), R. S. Gao
et al. 
H + Ne 
H_Ne.txt 
" 
H + Ar 
H_Ar.txt 
" 
H + Kr 
H_Kr.txt 
" 
H + Xe 
H_Xe.txt 
" 
H + H_{2} 
H_H2.txt 
'Absolute differential cross
sections for verysmallangle scattering of keV H and He atoms
by H_{2} and N_{2}' Phys. Rev. A 38, 2794
(1988), L. K. Johnson et al. 
H + N_{2} 
H_N2.txt 
" 
H + O_{2} 
H_O2.txt 
'Differential cross sections
for scattering of 0.5, 1.5, and 5.0 keV hydrogen atoms by He,
H_{2}, N_{2}, and O_{2}' J. Geophys.
Res. 91 8947 (1986), J. H. Newman et al. 
Notes:
 All of the wide angle data are from 'Differential cross sections
for scattering of 0.5, 1.5, and 5.0 keV hydrogen atoms by He,
H_{2}, N_{2}, and O_{2}' J. Geophys.
Res. 91 8947 (1986), J. H. Newman et al. but all available
data are plotted in the papers by Gao et al. (1990) and Johnson
et al. (1988). Also note the correction to one of the tables
in the Newman et al. (1986) paper (J. Geophys. Res. 94
7019 (1989)).
 The measured cross sections include contributions from all
elastic and inelastic processes resulting in a fast neutral product.
 The first column in each table is the laboratory scattering
angle (deg); the third, fifth, and seventh columns are the differential
cross sections (10^{16} cm^{2} sr^{1}).
The other columns give the respective uncertainties.
H^{+} Projectiles
Process 
File 
Source 
H^{+}
+ He 
H+_He_DS.txt 
'Absolute differential cross
sections for smallangle H^{+}He direct and chargetransfer
scattering at keV energies', Phys. Rev. A 40, 3626 (1989),
L. K. Johnson et al. 
H^{+} + Ne 
H+_Ne_DS.txt 
'Direct and chargetransfer
scattering of keVenergy H^{+} and He^{+} projectiles
from raregas atoms to obtain smallangle absolute differential
cross sections' Phys. Rev. A 40 4920 (1989), L. K. Johnson
et al. 
H^{+} + Ar 
H+_Ar_DS.txt 
" 
H^{+}
+ Kr 
H+_Kr_DS.txt 
" 
H^{+} + Xe 
H+_Xe_DS.txt 
" 
H^{+} + H_{2} 
H+_H2_DS.txt 
'Collisions between H^{+}
and H_{2} at kiloelectronvolt energies: Absolute differential
cross sections for smallangle direct, single, and doublecharge
transfer scattering' Phys. Rev. A 44, 5599(1991), R. S.
Gao et al. 
H^{+} + N_{2} 
H+_N2_DS.txt 
'Theoretical and experimental
studies of the H^{+}N_{2} system: Differential
cross sections for direct and chargetransfer scattering at keV
energies', Phys. Rev. A 66, 042712 (2002), R. CabreraTrujillo
et al. 
H^{+} + O_{2} 
H+_O2_DS.txt 
'Absolute differential and
total cross sections for direct and chargetransfer scattering
of keV protons by O_{2}', Phys. Rev. A 70, 042705
(2004), R. CabreraTrujillo, Y. Öhrn, E. Deumens, J. R.
Sabin, and B. G. Lindsay. 
Notes:
 The measured cross sections include contributions from all
elastic and inelastic processes resulting in a fast proton.
 The first column in each table is the laboratory scattering
angle (deg); the third column is the differential cross section
(10^{16} cm^{2} sr^{1}).
The other two columns give the respective uncertainties. The
H^{+} + H_{2} data were scanned from the original
paper and error bars are not given.
He Projectiles
Process 
File 
Source 
He + He 
He_He.txt 
'Differential scattering cross sections for collisions
of 0.5, 1.5, and 5.0 keV helium atoms with He, H_{2},
N_{2}, and O_{2}' J. Geophys. Res. 90,
11045 (1985), J. H. Newman et al.
'Absolute differential cross sections for verysmallangle
elastic scattering in He + He collisions at keV energies' Phys.
Rev. A 35, 4541 (1987), D. E. Nitz et al.

He + H_{2} 
He_H2.txt 
'Absolute differential
cross sections for verysmallangle scattering of keV H and He
atoms by H_{2} and N_{2}' Phys. Rev. A 38,
2794 (1988), L. K. Johnson et al. 
He + N_{2} 
He_N2.txt 
" 
He + O_{2} 
He_O2.txt 
'Differential scattering cross
sections for collisions of 0.5, 1.5, and 5.0 keV helium atoms
with He, H_{2}, N_{2}, and O_{2}' J.
Geophys. Res. 90, 11045 (1985), J. H. Newman et al. 
Notes:
 All of the wide angle data are from 'Differential scattering
cross sections for collisions of 0.5, 1.5, and 5.0 keV helium
atoms with He, H_{2}, N_{2}, and O_{2}'
J. Geophys. Res. 90, 11045 (1985), J. H. Newman et al. but all
available data are plotted in the referenced papers.
 The measured cross sections include contributions from all
elastic and inelastic processes resulting in a fast neutral product.
 The first column in each table is the laboratory scattering
angle (deg); the third column is the differential cross section
(10^{16} cm^{2} sr^{1}).
The other two columns give the respective uncertainties.
 For He + He, the data at angles of 0.5 degrees or more are
from Newman et al. (1985) and most of those at smaller angles
are from Nitz et al. (1987).
He^{+} Projectiles
Process 
File 
Source 
He^{+}
+ He 
He+_He_DS.txt 
'Direct and chargetransfer scattering
of keVenergy H^{+} and He^{+} projectiles from
raregas atoms to obtain smallangle absolute differential cross
sections' Phys. Rev. A 40 4920 (1989), L. K. Johnson et
al. 
He^{+} + Ne 
He+_Ne_DS.txt 
" 
He^{+} + Ar 
He+_Ar_DS.txt 
" 
He^{+}
+ Kr 
He+_Kr_DS.txt 
" 
He^{+} + Xe 
He+_Xe_DS.txt 
" 
Notes:
 The measured cross sections include contributions from all
elastic and inelastic processes resulting in a fast He^{+}.
 The first column in each table is the laboratory scattering
angle (deg); the third column is the differential cross section
(10^{16} cm^{2} sr^{1}).
The other two columns give the respective uncertainties.
O Projectiles
Notes:
 E is the laboratory energy of the O projectile.
 The measured cross sections include contributions from all
elastic and inelastic processes resulting in a fast neutral oxygen
atom product.
 The first column in each table is the laboratory scattering
angle (deg); the third, fifth, and seventh columns are the differential
cross sections (10^{16} cm^{2} sr^{1}).
The other columns give the respective uncertainties.
 These data are from 'Absolute differential cross sections
for scattering of keV Oatoms' Phys Rev A 53, 1581 (1996),
G. J. Smith, R. S. Gao, B. G. Lindsay, K. A. Smith and R. F.
Stebbings.
 These data supercede those in 'Differential cross sections
for scattering of 0.5, 1.5, and 5.0keV oxygen atoms by He,
N_{2}, and O_{2}', J. Geophys. Res. 92,
6107 (1987), D. A. Schafer, J. H. Newman, K. A. Smith, and R.
F. Stebbings.
 The 100 eV cross sections were calculated from an extrapolation
of the high energy measurements.
O^{+} Projectiles
Notes:
 The measured cross sections include contributions from all
elastic and inelastic processes resulting in a fast O^{+}
ion.
 The first column in each table is the laboratory scattering
angle (deg); the third column is the differential cross section
(10^{16} cm^{2} sr^{1}).
The other two columns give the respective uncertainties.
 The 100 eV cross sections were calculated from an extrapolation
of the high energy measurements.
Physics
and Astronomy  Rice
Quantum Institute Rice
Space Institute
Rice University
Updated April 29, 2005
