dorsal/arxiv
View SchemaElectron gas polarization effect induced by heavy H-like ions of moderate velocities channeled in a silicon crystal
| Authors | D. Dauvergne, A. Bräuning-Demian, F. Bosch, H. Bräuning, M. Chevallier, C. Cohen, A. Gumberidze, S. Hagmann, A. L'hoir, R. Kirsch, C. Kozhuharov, D. Liesen, P. H. Mokler, J. -C. Poizat, C. Ray, J. -P. Rozet, Th. Stöhlker, S. Toleikis, M. Toulemonde, P. Verma |
|---|---|
| Categories | |
| ArXiv ID | physics/0509094 |
| URL | https://arxiv.org/abs/physics/0509094 |
| DOI | 10.1016/j.nimb.2005.11.073 |
| Journal | Nuclear Instruments and Methods in Physics Research B 245 (2006) 47-51 |
Abstract
We report on the observation of a strong perturbation of the electron gas induced by 20 MeV/u U$^{91+}$ ions and 13 MeV/u Pb$^{81+}$ ions channeled in silicon crystals. This collective response (wake effect) in-duces a shift of the continuum energy level by more than 100 eV, which is observed by means of Radiative Electron Capture into the K and L-shells of the projectiles. We also observe an increase of the REC probability by 20-50% relative to the probability in a non-perturbed electron gas. The energy shift is in agreement with calculations using the linear response theory, whereas the local electron density enhancement is much smaller than predicted by the same model. This shows that, for the small values of the adiabaticity parameter achieved in our experiments, the density fluctuations are not strongly localized at the vicinity of the heavy ions.
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"abstract": "We report on the observation of a strong perturbation of the electron gas\ninduced by 20 MeV/u U$^{91+}$ ions and 13 MeV/u Pb$^{81+}$ ions channeled in\nsilicon crystals. This collective response (wake effect) in-duces a shift of\nthe continuum energy level by more than 100 eV, which is observed by means of\nRadiative Electron Capture into the K and L-shells of the projectiles. We also\nobserve an increase of the REC probability by 20-50% relative to the\nprobability in a non-perturbed electron gas. The energy shift is in agreement\nwith calculations using the linear response theory, whereas the local electron\ndensity enhancement is much smaller than predicted by the same model. This\nshows that, for the small values of the adiabaticity parameter achieved in our\nexperiments, the density fluctuations are not strongly localized at the\nvicinity of the heavy ions.",
"arxiv_id": "physics/0509094",
"authors": [
"D. Dauvergne",
"A. Br\u00e4uning-Demian",
"F. Bosch",
"H. Br\u00e4uning",
"M. Chevallier",
"C. Cohen",
"A. Gumberidze",
"S. Hagmann",
"A. L\u0027hoir",
"R. Kirsch",
"C. Kozhuharov",
"D. Liesen",
"P. H. Mokler",
"J. -C. Poizat",
"C. Ray",
"J. -P. Rozet",
"Th. St\u00f6hlker",
"S. Toleikis",
"M. Toulemonde",
"P. Verma"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1016/j.nimb.2005.11.073",
"journal_ref": "Nuclear Instruments and Methods in Physics Research B 245 (2006)\n 47-51",
"title": "Electron gas polarization effect induced by heavy H-like ions of moderate velocities channeled in a silicon crystal",
"url": "https://arxiv.org/abs/physics/0509094"
},
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