Positronium formation in Debye plasma |
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Authors: | S Sen P Mandal P K Mukherjee |
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Institution: | (1) Atomic and Molecular Physics Laboratories Research School of Physical Sciences and Engineering, Australian National University, ACT 0200 Canberra, Australia;(2) York University, Department of Physics and Astronomy, 4700 Keele Street, M3J 1P3 Toronto, ON, Canada |
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Abstract: | Positronium (Ps) formation during positron-hydrogen collisions in Debye plasma has been
studied in detail by using the second-order distorted-wave approximation with the
inclusion of the adiabatic dipole polarization potential. Reliable results have been
reported at several incident positron energies in the range from the Ps formation
threshold to 500 eV for different values of the Debye screening
parameter μ. Resonances for S-, P- and D-wave partial Ps formation
cross sections appear to exist for 0.03 ≤ μ ≤ 0.3. Interesting structures
in the differential cross sections are displayed in the surface plots. It is reported here
for the first time that there is a huge probability of Ps formation in dense plasma
corresponding to Debye screening parameter μ ≥ 0.3. |
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Keywords: | |
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