Shipman, M;
Brawley, SJ;
Sarkadi, L;
Laricchia, G;
(2017)
Resonant scattering of positronium as a quasifree electron.
PHYSICAL REVIEW A
, 95
(3)
10.1103/PhysRevA.95.032704.
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Abstract
In order to clarify the physics underlying the observations of the electronlike behavior of positronium (Ps) and its resonant scattering from CO2, we have measured the Ps+N2 total cross section and found it also to exhibit significant structure. Analysis of the resonances reveals that Ps is distorted in the collisions and classical trajectory Monte Carlo calculations indicate that the electron is on average closer to the target than the positron, which may in turn bind resonantly to the ensuing temporary negative ion. This description of the nature of Ps resonances agrees with long-standing theoretical predictions.
| Type: | Article |
|---|---|
| Title: | Resonant scattering of positronium as a quasifree electron |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevA.95.032704 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevA.95.032704 |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
| Keywords: | Science & Technology, Physical Sciences, Optics, Physics, Atomic, Molecular & Chemical, Physics, HYDROGEN ELASTIC-SCATTERING, PS BEAM, COLLIMATED POSITRONIUM, ATOM COLLISIONS, CROSS-SECTIONS, MOLECULES, PHYSICS, HYDRIDE, STATES, CF4 |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1550606 |
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