dorsal/arxiv
View SchemaIntermanifold similarities in partial photoionization cross sections of helium
| Authors | Tobias Schneider, Chien-Nan Liu, Jan-Michael Rost |
|---|---|
| Categories | |
| ArXiv ID | physics/0111100 |
| URL | https://arxiv.org/abs/physics/0111100 |
| DOI | 10.1103/PhysRevA.65.042715 |
| Journal | Phys. Rev. A65, 042715 (2002) |
Abstract
Using the eigenchannel R-matrix method we calculate partial photoionization cross sections from the ground state of the helium atom for incident photon energies up to the N=9 manifold. The wide energy range covered by our calculations permits a thorough investigation of general patterns in the cross sections which were first discussed by Menzel and co-workers [Phys. Rev. A {\bf 54}, 2080 (1996)]. The existence of these patterns can easily be understood in terms of propensity rules for autoionization. As the photon energy is increased the regular patterns are locally interrupted by perturber states until they fade out indicating the progressive break-down of the propensity rules and the underlying approximate quantum numbers. We demonstrate that the destructive influence of isolated perturbers can be compensated with an energy-dependent quantum defect.
{
"annotation_id": "3f35d02a-89dd-49c6-9397-82165124b4ae",
"date_created": "2026-03-02T18:00:36.378000Z",
"date_modified": "2026-03-02T18:00:36.378000Z",
"file_hash": "bb763b4cbb79beb64780526e038627c0aa7adbc60dc3666bb7ebf896f7e6aad4",
"private": false,
"record": {
"abstract": "Using the eigenchannel R-matrix method we calculate partial photoionization\ncross sections from the ground state of the helium atom for incident photon\nenergies up to the N=9 manifold. The wide energy range covered by our\ncalculations permits a thorough investigation of general patterns in the cross\nsections which were first discussed by Menzel and co-workers [Phys. Rev. A {\\bf\n54}, 2080 (1996)]. The existence of these patterns can easily be understood in\nterms of propensity rules for autoionization. As the photon energy is increased\nthe regular patterns are locally interrupted by perturber states until they\nfade out indicating the progressive break-down of the propensity rules and the\nunderlying approximate quantum numbers. We demonstrate that the destructive\ninfluence of isolated perturbers can be compensated with an energy-dependent\nquantum defect.",
"arxiv_id": "physics/0111100",
"authors": [
"Tobias Schneider",
"Chien-Nan Liu",
"Jan-Michael Rost"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.65.042715",
"journal_ref": "Phys. Rev. A65, 042715 (2002)",
"title": "Intermanifold similarities in partial photoionization cross sections of helium",
"url": "https://arxiv.org/abs/physics/0111100"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "975833ba-f984-433c-8eff-e35daf7db2fa",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}