{"paper":{"title":"Electron-impact excitation and ionization of atomic calcium at intermediate energies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Henry Parker, Klaus Bartschat, Oleg Zatsarinny","submitted_at":"2018-11-17T15:16:05Z","abstract_excerpt":"We present a comprehensive study of electron collisions with calcium atoms by using the convergent \\emph{B}-spline \\emph{R}-matrix method. Elastic, excitation, and ionization cross sections were obtained for all transitions between the lowest 39 physical states of calcium (except for $3p^6 4s5g\\ ^{3,1}G$) up to the $3p^6 4s8s\\ ^1S$ state, for incident electron energies ranging from threshold to 100~eV. A multi\\-configuration Hartree-Fock method with non\\-orthogonal term-dependent orbitals was employed to generate accurate wave functions for the target states. Close-coupling expansions includin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.07176","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}