TWENTY-FIVE years ago in Russia, Zavoisky made the first experimen- tal observation of electron spin resonances; and a year later Purcell, Torrey and Pound at Harvard and Bloch, Hansen and Packard at Stanford ('The Harvard of the West') observed nuclear magnetic resonances for the first time. In both cases (ESR and NMR) the phenomena had been previously predicted, and Gorter - surely one of the most unlucky experimenters of our time - had made his noble attempts to detect magnetic resonances. Purcell et aZ., having beaten their radar swords into scientific ploughshares, used a re- 3 sonant...
TWENTY-FIVE years ago in Russia, Zavoisky made the first experimen- tal observation of electron spin resonances; and a year later Purcell, Torrey and ...
