Nuclear physics between 1921 and 1947 shaped more than anyother science thepolitical landscape of our century and thepublic opinion on physical research. Using quantitativescientometric methods, a new branch in the history ofscience, the author focuses on the developments of nuclearphysics in these formative years paying special attention totheimpact of German emigrants on the evolution of the fieldas a cognitive and social unity. The book is based on athorough analysis of various citation analyses thusproducing results that should be more replicable and moreobjective. The scientometric techniques should complementthe more qualitative approach usually applied in historicalwriting. This makes the text an interesting study also forthe historian in general.