dorsal/arxiv
View SchemaElectron-impact ionization of atomic hydrogen from near threshold to high energies
| Authors | Igor Bray |
|---|---|
| Categories | |
| ArXiv ID | physics/9906008 |
| URL | https://arxiv.org/abs/physics/9906008 |
| DOI | 10.1071/PH000355 |
Abstract
Application of the convergent close-coupling (CCC) method to electron-impact ionization of the ground state of atomic hydrogen is considered at incident energies of 15.6, 17.6, 20, 25, 27.2, 30, 54.4, 150 and 250 eV. Total through to fully differential cross sections are presented. Following the analysis of Stelbovics [submitted to Phys. Rev. Lett. (physics/9905020)] the equal-energy sharing cross sections are calculated using a solely coherent combination of total-spin-dependent ionization amplitudes, which are found to be simply a factor of two greater than the incoherent combination suggested by Bray and Fursa [1996 Phys. Rev. A {\bf 54}, 2991]. As a consequence, the CCC theory is particularly suited to the equal-energy-sharing kinematical region, and is able to obtain convergent absolute scattering amplitudes, fully ab initio. This is consistent with the step-function hypothesis of Bray [1997 Phys. Rev. Lett. {\bf 78}, 4721], and indicates that at equal-energy-sharing the CCC amplitudes converge to half the step size. Comparison with experiment is satisfactory in some cases and substantial discrepancies are identified in others. The discrepancies are generally unpredictable and some internal inconsistencies in the experimental data are identified. Accordingly, new (e,2e) measurements are requested.
{
"annotation_id": "66ee0578-e085-4bff-8ddd-5f6291c36e06",
"date_created": "2026-03-02T18:01:25.416000Z",
"date_modified": "2026-03-02T18:01:25.416000Z",
"file_hash": "0fb2dfc2d46e1bcc841dacd962b34cb35f7b6c8c5dc93988780be22285580078",
"private": false,
"record": {
"abstract": "Application of the convergent close-coupling (CCC) method to electron-impact\nionization of the ground state of atomic hydrogen is considered at incident\nenergies of 15.6, 17.6, 20, 25, 27.2, 30, 54.4, 150 and 250 eV. Total through\nto fully differential cross sections are presented. Following the analysis of\nStelbovics [submitted to Phys. Rev. Lett. (physics/9905020)] the equal-energy\nsharing cross sections are calculated using a solely coherent combination of\ntotal-spin-dependent ionization amplitudes, which are found to be simply a\nfactor of two greater than the incoherent combination suggested by Bray and\nFursa [1996 Phys. Rev. A {\\bf 54}, 2991]. As a consequence, the CCC theory is\nparticularly suited to the equal-energy-sharing kinematical region, and is able\nto obtain convergent absolute scattering amplitudes, fully ab initio. This is\nconsistent with the step-function hypothesis of Bray [1997 Phys. Rev. Lett.\n{\\bf 78}, 4721], and indicates that at equal-energy-sharing the CCC amplitudes\nconverge to half the step size. Comparison with experiment is satisfactory in\nsome cases and substantial discrepancies are identified in others. The\ndiscrepancies are generally unpredictable and some internal inconsistencies in\nthe experimental data are identified. Accordingly, new (e,2e) measurements are\nrequested.",
"arxiv_id": "physics/9906008",
"authors": [
"Igor Bray"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1071/PH000355",
"title": "Electron-impact ionization of atomic hydrogen from near threshold to high energies",
"url": "https://arxiv.org/abs/physics/9906008"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "8dcdf3be-dd02-41db-95aa-fe9ba0e5fbe1",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}