es ’ ▁research ▁and ▁doctor al ▁th esis ▁led ▁to ▁his ▁publication ▁of ▁Me asure ments ▁on ▁the ▁Near - In fra red ▁Abs or ption ▁of ▁Some ▁Di atomic ▁G ases ▁in ▁November ▁ 1 9 1 9 ▁in ▁the ▁Ast ro phys ical ▁Journal . ▁This ▁work ▁was ▁followed ▁by ▁a ▁paper ▁co - author ed ▁and ▁presented ▁in ▁November ▁ 1 9 1 9 ▁joint ly ▁with ▁Harrison ▁M . ▁Rand all , ▁" The ▁Fine ▁Str ucture ▁of ▁the ▁Near ▁Inf ra - Red ▁Abs or ption ▁B ands ▁of ▁H CI , ▁H Br , ▁and ▁H F " ▁at ▁the ▁American ▁Phys ical ▁Society ; ▁it ▁was ▁published ▁in ▁the ▁Phys ical ▁Review ▁in ▁February ▁ 1 9 2 0 . ▁This ▁work ▁demonstrated ▁for ▁the ▁first ▁time ▁that ▁Quant um ▁Theory ▁could ▁be ▁applied ▁to ▁radiation ▁in ▁all ▁regions ▁of ▁the ▁elect romagnet ic ▁spectrum , ▁to ▁the ▁rot ational ▁energy ▁states ▁of ▁mole cules , ▁as ▁well ▁as ▁the ▁v ibration ▁and ▁electronic ▁levels . ▁Im es ' ▁work ▁provided ▁an ▁early ▁ver ification ▁of ▁Quant um ▁Theory . ▁ ▁It ▁became ▁known ▁in ▁Europe ▁as ▁well ▁as ▁in ▁the ▁United ▁States . ▁ ▁Im es ' ▁work ▁was ▁one ▁of ▁the ▁earliest ▁applications ▁of ▁high ▁resolution ▁inf ra red ▁spect ro sc opy ▁and ▁provided ▁the ▁first ▁detailed ▁spect ra ▁of ▁mole cules . ▁This ▁led ▁to ▁development ▁of ▁the ▁field ▁of ▁study ▁of ▁mole cular ▁structure ▁through ▁inf ra red ▁spect ro sc