dorsal/arxiv
View SchemaInterference effects in the photorecombination of argonlike Sc3+ ions: Storage-ring experiment and theory
| Authors | Stefan Schippers, Stefan Kieslich, Alfred Mueller, Gerald Gwinner, Michael Schnell, Andreas Wolf, Aaron Covington, Mark E. Bannister, Li-Bo Zhao |
|---|---|
| Categories | |
| ArXiv ID | physics/0202017 |
| URL | https://arxiv.org/abs/physics/0202017 |
| DOI | 10.1103/PhysRevA.65.042723 |
| Journal | Phys. Rev. A 65 (2002) 042723 (10 pages) |
Abstract
Absolute total electron-ion recombination rate coefficients of argonlike Sc3+(3s2 3p6) ions have been measured for relative energies between electrons and ions ranging from 0 to 45 eV. This energy range comprises all dielectronic recombination resonances attached to 3p -> 3d and 3p -> 4s excitations. A broad resonance with an experimental width of 0.89 +- 0.07 eV due to the 3p5 3d2 2F intermediate state is found at 12.31 +- 0.03 eV with a small experimental evidence for an asymmetric line shape. From R-Matrix and perturbative calculations we infer that the asymmetric line shape may not only be due to quantum mechanical interference between direct and resonant recombination channels as predicted by Gorczyca et al. [Phys. Rev. A 56, 4742 (1997)], but may partly also be due to the interaction with an adjacent overlapping DR resonance of the same symmetry. The overall agreement between theory and experiment is poor. Differences between our experimental and our theoretical resonance positions are as large as 1.4 eV. This illustrates the difficulty to accurately describe the structure of an atomic system with an open 3d-shell with state-of-the-art theoretical methods. Furthermore, we find that a relativistic theoretical treatment of the system under study is mandatory since the existence of experimentally observed strong 3p5 3d2 2D and 3p5 3d 4s 2D resonances can only be explained when calculations beyond LS-coupling are carried out.
{
"annotation_id": "657a5a8c-2433-483f-859a-e55408f618a6",
"date_created": "2026-03-02T18:00:39.379000Z",
"date_modified": "2026-03-02T18:00:39.379000Z",
"file_hash": "7efec663821a211e91041c579c752d1d5948070ccf184e8a5d6e653dcb6fa7cb",
"private": false,
"record": {
"abstract": "Absolute total electron-ion recombination rate coefficients of argonlike\nSc3+(3s2 3p6) ions have been measured for relative energies between electrons\nand ions ranging from 0 to 45 eV. This energy range comprises all dielectronic\nrecombination resonances attached to 3p -\u003e 3d and 3p -\u003e 4s excitations. A broad\nresonance with an experimental width of 0.89 +- 0.07 eV due to the 3p5 3d2 2F\nintermediate state is found at 12.31 +- 0.03 eV with a small experimental\nevidence for an asymmetric line shape. From R-Matrix and perturbative\ncalculations we infer that the asymmetric line shape may not only be due to\nquantum mechanical interference between direct and resonant recombination\nchannels as predicted by Gorczyca et al. [Phys. Rev. A 56, 4742 (1997)], but\nmay partly also be due to the interaction with an adjacent overlapping DR\nresonance of the same symmetry. The overall agreement between theory and\nexperiment is poor. Differences between our experimental and our theoretical\nresonance positions are as large as 1.4 eV. This illustrates the difficulty to\naccurately describe the structure of an atomic system with an open 3d-shell\nwith state-of-the-art theoretical methods. Furthermore, we find that a\nrelativistic theoretical treatment of the system under study is mandatory since\nthe existence of experimentally observed strong 3p5 3d2 2D and 3p5 3d 4s 2D\nresonances can only be explained when calculations beyond LS-coupling are\ncarried out.",
"arxiv_id": "physics/0202017",
"authors": [
"Stefan Schippers",
"Stefan Kieslich",
"Alfred Mueller",
"Gerald Gwinner",
"Michael Schnell",
"Andreas Wolf",
"Aaron Covington",
"Mark E. Bannister",
"Li-Bo Zhao"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.65.042723",
"journal_ref": "Phys. Rev. A 65 (2002) 042723 (10 pages)",
"title": "Interference effects in the photorecombination of argonlike Sc3+ ions: Storage-ring experiment and theory",
"url": "https://arxiv.org/abs/physics/0202017"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "dd8c7068-7f2b-4eb8-a491-4c07bd94727a",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}