He is credited with refining the isotopic composition and atomic weight measurements of elements , including antimony , barium , tin and ytterbium .
De Laeter 's scientific interests were broad , but centred on the application of mass spectrometry techniques in cosmochemistry and nuclear physics .
De Laeter is credited with refining the isotopic composition and atomic weight measurements of elements , including antimony , barium , tin and ytterbium .
De Laeter 's scientific interests were broad , but centred on the application of mass spectrometry techniques in cosmochemistry and nuclear physics .