Elastic and inelastic cross sections for positron scattering from molecular oxygen
Elastic, vibrational and rotational cross sections for positron scattering from molecular oxygen are reported within the close-coupling formalism, using a three-dimensional positron–target potential energy surface. The present elastic values show good agreement with a recently reported theoretical p...
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| Veröffentlicht in: | The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2023-10, Vol.77 (10), Article 184 |
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| container_title | The European physical journal. D, Atomic, molecular, and optical physics |
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| creator | Pinheiro, Jenifer G. Assafrão, Denise Poveda, Luis A. Mohallem, José R. |
| description | Elastic, vibrational and rotational cross sections for positron scattering from molecular oxygen are reported within the close-coupling formalism, using a three-dimensional positron–target potential energy surface. The present elastic values show good agreement with a recently reported theoretical prediction and helps to better understand the observed discrepancies between theory and experiment for energies below
1
eV
. For energies up to the opening of the positronium channel, details of the elastic cross section are also discussed. The cross section for excitation of the fundamental vibrational mode shows a sharp onset at threshold followed by a peak, similar to the observed in our previous work for the N
2
target, although roughly three times greater than the last one. The rotational excitation cross sections for positron scattering from O
2
are reported.
Graphical abstract |
| doi_str_mv | 10.1140/epjd/s10053-023-00764-9 |
| format | Article |
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1
eV
. For energies up to the opening of the positronium channel, details of the elastic cross section are also discussed. The cross section for excitation of the fundamental vibrational mode shows a sharp onset at threshold followed by a peak, similar to the observed in our previous work for the N
2
target, although roughly three times greater than the last one. The rotational excitation cross sections for positron scattering from O
2
are reported.
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1
eV
. For energies up to the opening of the positronium channel, details of the elastic cross section are also discussed. The cross section for excitation of the fundamental vibrational mode shows a sharp onset at threshold followed by a peak, similar to the observed in our previous work for the N
2
target, although roughly three times greater than the last one. The rotational excitation cross sections for positron scattering from O
2
are reported.
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1
eV
. For energies up to the opening of the positronium channel, details of the elastic cross section are also discussed. The cross section for excitation of the fundamental vibrational mode shows a sharp onset at threshold followed by a peak, similar to the observed in our previous work for the N
2
target, although roughly three times greater than the last one. The rotational excitation cross sections for positron scattering from O
2
are reported.
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| subjects | Applications of Nonlinear Dynamics and Chaos Theory Atomic Electron and Positron Interactions and Their Applications-a tribute to Professor Michael Brunger Excitation Inelastic scattering Molecular Optical and Plasma Physics Oxygen Physical Chemistry Physics Physics and Astronomy Positron scattering Positronium Potential energy Quantum Information Technology Quantum Physics Regular Article – Atomic and Molecular Collisions Scattering cross sections Spectroscopy/Spectrometry Spintronics Vibration mode |
| title | Elastic and inelastic cross sections for positron scattering from molecular oxygen |
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