A theoretical investigation of the configurations (3d + 4s)6 4p in neutral manganese (MnI)

A Theoretical Investigation of the Configurations(3d + 45)6 4p in Neutral Manganese (Mn 1)* C. Roth** (April 6, 1970) Experim e nt a l leve ls of th e co nfi gurati ons (3d+4s)H4p in Mn t were co mpa re d with correspo ndin g ca lc ul at.ed va lu es.On fittin g 228 expe rim e nta l le ve ls by mea ns of 20 free para me te rs an rm s error of on Iy 170 Cm -I was obtain e d.It was s hown that the correction p aramete rs f3 and T were not s ignifi cant. Key word s : En e rgy le ve ls MnI ; g-factors Mn I ; int e ra cti ons betwee n co nfi g urat ions Mn t; manganese s pectrum; Mn J co nfi gura ti ons (3d+4s)I; 4p_ *An invited pa pe r. " Prese nt address: Depa rtmcnt of Math e mati cs .McGi ll Uni vI! rs il y.Montreal 110.Ca nada.I Figures in bracke ts ind ic ate lit erature refe re nces at th e end of thi s paper. 2 The rea d e r is referre d l o these papers fo r a n ex pl anati on of th e me thod used , nota tion , an d s ignifica nce of t he va riou s paramete rs.The num eri cal values of al l level s an d parame ters a re in e m -I.:.I Unp rimed paramete rs re fer to th e configu rat ion 3d64p, prim ed parame ters 10 3d~4s4p .and doub ly prim ed parame1c rs to 3d '4s1 4p.