Wavelengths, intensities, and Zeeman patterns in ytterbium spectra (Yb I, II, III, IV)

In 1937, Meggers and Scribn er publi s hed a paper o n arc and s park s pectra of ytterbium provid in g wave le n gth s, relativ e inte nsities, and s pectrum numbe rs of 1668 spec tra l lin es, in c ludin g a bout 400 for Yb I , 1250 for Yb II, and 12 for Yb III. That work was handicapped by impure mat e ri als and co n venti onal li ght so urces. When pure ytterb ium metal and new li ght sources beca me avai lab le in 1950, Meggers and Corliss decided to make a ne w d esc ri pt ion of ytterbium sQec tra. Thi s ne w d esc ription in clud es data for 7300 spec tral lines with wave le ngth s be tw ee n 2000 A a nd 12000 A di s tribut e d as fo llows: 1800 belon g to Yb 1,5100 to Yb II, 430 to Yb III , and 5 to Yb IV . Th e Zee man e ffect on 1300 lin es ha s been o bse rved in ma gneti c fi e ld int e nsi ti es ran gin g from 3.7 to 9.358 tes la (37000 to 93580 ga uss). Th ese data were obta in e d for c he mical id e ntific ation s an d for s tructural ana lyses of th e firs t two s pec tra of ytterb iu m. Kcy Word s : S pec tra of ytterbium : ytt e rbium. s pectra of: Zeeman efrcc t in ytterb ium : wavel e ngth s of ytte rbiu Ill .