{"paper":{"title":"A DPF analysis yields accurate analytic potentials for Li$_2(a\\,^3\\Sigma^+_u)$ and Li$_2(1\\,^3 \\Sigma^+_g)$ that incorporate 3-state mixing near the $1\\,^3 \\Sigma^+_g$-state asymptote","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.comp-ph","quant-ph"],"primary_cat":"physics.chem-ph","authors_text":"Nikesh S. Dattani, Robert J. Le Roy","submitted_at":"2011-01-07T06:48:54Z","abstract_excerpt":"A combined-isotopologue direct-potential-fit (DPF) analysis of optical and photoassociation spectroscopy data for the $a\\,^{3}\\Sigma_u^+$ and $1\\,^3\\Sigma_g^+$ states of Li$_2$ has yielded accurate analytic potential energy functions for both states. The recommended M3LR$_{5,3}^{8.0}(3)$ potential for the $a\\,^3\\Sigma_u^+$ of $^{7,7}$Li$_2$ has a well depth of $\\,{\\mathfrak D}_e= 333.758(7)\\,{\\rm cm^{-1}}$ and equilibrium distance of $\\,r_e= 4.17005(3)~$\\AA, and the associated scattering lengths are $\\,a_{\\rm SL}= -14.759(9)\\,$\\AA\\ for $^{7,7}$Li$_2$ and $-1906(50)\\,$\\AA\\ for $^{6,6}$Li$_2$. F"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.1361","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"}