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March 10, 1997
Dr. E.M. Purcell, 84, Shared Nobel for Work on Hydrogen
r. Edward M. Purcell, who made it possible to "listen" to the whisperings of hydrogen throughout the universe, died Friday in Cambridge, Mass.
Edward purcell
He was 84.
The cause was respiratory failure, a son said.
Purcell had been associated with Harvard University since 1936, retiring from there in 1977 as the Gerhard Gade University Professor.
In 1952, he shared the Nobel Prize in Physics for discovering a way to detect the extremely weak magnetism of the atomic nucleus.
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The method, measuring nuclear magnetic resonance, is widely used to study the structure of molecules and to measure magnetic fields.
The previous year, he and a graduate student, Harold I. Ewen, used an antenna on a Harvard roof for the first detection of radio emissions from clouds of hydrogen in space.
As had been predicted, the emissions were at a wavelength of 21 centimeters, or 8.3 inches.
Because hydrogen is the dominant material of