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We present here triple differential cross sections for ionization of hydrogenatoms by electron impact at 1eV, 0.5eV and 0.3eV energy above threshold,calculated in the hyperspherical partial wave theory. The results are in verygood agreement with the available semiclassical results of Deb and Crothers\cite{DC02} for these energies. With this, we are able to demonstrate that thehyperspherical partial wave theory yields good cross sections from 30 eV\cite{DPC03} down to near threshold for equal energy sharing kinematics.Comment: 6 pages, 9 figure

physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics

Ionization of hydrogen atoms by electron impact at 1, 0.5, and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>0.3</mml:mn><mml:mspace width="0.3em" /><mml:mi>eV</mml:mi></mml:mrow></mml:math>above threshold

Ionization of hydrogen atoms by electron impact at 1, 0.5, and0.3eVabove threshold