▁Institute ▁of ▁Technology ▁ 1 9 5 1 – 1 9 5 4 , ▁and ▁then ▁professor ▁of ▁experimental ▁physics ▁at ▁U pp s ala ▁University ▁ 1 9 5 4 – 1 9 8 4 , ▁which ▁was ▁the ▁same ▁chair ▁his ▁father ▁had ▁held . ▁He ▁shared ▁the ▁ 1 9 8 1 ▁Nobel ▁Prize ▁in ▁Physics ▁with ▁Nicola as ▁Blo ember gen ▁and ▁Arthur ▁Sch aw low ▁for ▁their ▁work ▁in ▁las er ▁spect ro sc opy . ▁ ▁Sieg bahn ▁obtained ▁the ▁Nobel ▁Prize ▁for ▁developing ▁the ▁method ▁of ▁Electron ▁Spect ro sc opy ▁for ▁Chem ical ▁Analysis ▁( ES CA ), ▁now ▁usually ▁described ▁as ▁X - ray ▁photo elect ron ▁spect ro sc opy ▁( X PS ). ▁At ▁the ▁time ▁of ▁his ▁death ▁he ▁was ▁still ▁active ▁as ▁a ▁scient ist ▁at ▁the ▁Å ng ström ▁Labor atory ▁at ▁U pp s ala ▁University . ▁ ▁Publications ▁K ai ▁Sieg bahn ▁was ▁one ▁of ▁the ▁original ▁edit ors ▁of ▁the ▁Encyclopedia ▁of ▁Anal yt ical ▁Chem istry ▁ ▁References ▁ ▁External ▁links ▁▁ ▁including ▁the ▁Nobel ▁L ect ure , ▁December ▁ 8 , ▁ 1 9 8 1 ▁Electron ▁Spect ro sc opy ▁for ▁At oms , ▁M ole cules ▁and ▁Cond ensed ▁M atter ▁ ▁Category : 1 9 1 8 ▁birth s ▁Category : 2 0 0 7 ▁death s ▁Category : Ex perimental ▁phys ic ists ▁Category : N ob el ▁la ure ates ▁in ▁Physics ▁Category : S wed ish ▁phys