Purcell , Edward Mills


Purcell , Edward Mills
(1912–) American physicist
Purcell was born at Taylorville, Illinois. He gained his BSc degree in electrical engineering at Purdue University, Illinois (1933) and his masters degree and PhD from Harvard (1938), having also spent a year in Germany at the Technische Hochschule, Karlsruhe. At Harvard his career advanced from instructor in physics (1938), to associate professor (1946), full professor (1949), and professor emeritus (1980). During the war years 1941–45 he was a group leader at the Massachusetts Institute of Technology Radiation Laboratories.
Purcell's research has spanned nuclear magnetism, radio astronomy, radar, astrophysics, and biophysics. In the field of nuclear magnetism, he was awarded the 1952 Nobel Prize for physics (shared with Felix Bloch) for his work in developing the nuclear magnetic resonance (NMR) method of measuring the magnetic fields of the nuclei of atoms. As a result of these experiments, measurements of nuclear magnetic moment could now be performed on solids and liquids, whereas previously they had been confined to molecular beams of gases. Nuclear magnetic resonance is now commonly applied in chemical analysis.
Purcell's major contribution to astronomy was the first detection of microwave emission from neutral hydrogen in interstellar space at the wavelength of 21 centimeters (1420Hz). The phenomenon had been predicted theoretically by Hendrik van de Hulst and others and was first observed in 1951 by three independent groups of radio astronomers – American, Dutch, and Australian – the American group being the first to report their findings. This, and the subsequent observation of the corresponding absorption line by the Dutch group in 1954, has made possible the mapping of a large part of our own galaxy, and allowed the calculation of the excitation temperature in interstellar space. Purcell was also aware of the possible future implications of his discovery for interstellar communications.

Scientists. . 2011.

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  • Purcell, Edward Mills — ▪ 1998       American physicist (b. Aug. 30, 1912, Taylorville, Ill. d. March 7, 1997, Cambridge, Mass.), shared the 1952 Nobel Prize for Physics with Felix Bloch for independently developing nuclear magnetic resonance (NMR), a method used to… …   Universalium

  • Purcell, Edward Mills — ► (1912 97) Físico estadounidense. Fue premio Nobel de Física en 1952, compartido con Bloch, por su descubrimiento de la resonancia magnética nuclear en los sólidos …   Enciclopedia Universal

  • Edward Mills Purcell — Edward Mills Purcell. Edward Mills Purcell (* 30. August 1912 in Taylorville, Illinois; † 7. März 1997 in Cambridge, Massachusetts) war ein amerikanischer Physiker. Purcell studierte an der Purdue University (Bachelor Abschluss in Elekt …   Deutsch Wikipedia

  • Edward Mills Purcell — Pour les articles homonymes, voir Purcell. Edward Mills Purcell. Edward Mills Purcell (30 août 1912 7  …   Wikipédia en Français

  • Edward Mills Purcell — Saltar a navegación, búsqueda Retrato de 1952. Edward Mills Purcell (Taylorville, 30 de agosto de 1912 Cambridge, 7 de marzo de 1997) fue un físico estadounidense que compartió el Premio Nobel de Física de 1952 con Felix Bloch por sus… …   Wikipedia Español

  • Edward Mills Purcell — Infobox Scientist name = Edward Purcell imagesize = 180px caption = Edward Mills Purcell (1912 1997) birth date = August 30, 1912 birth place = Taylorville, Illinois, USA death date = March 7, 1997 death place = Cambridge, Massachusetts, USA… …   Wikipedia

  • Edward Mills Purcell — Físico norteamericano, n. en Taylorville (Ill.) y m. en Cambridge (Mass.). A poco de iniciar su labor de profesor en la Universidad de Harvard (1949), detectó las microondas emitidas por el hidrógeno en el espacio interestelar, radiación que… …   Enciclopedia Universal

  • Physiknobelpreis 1952: Felix Bloch — Edward Mills Purcel —   Die amerikanischen Physiker erhielten den Nobelpreis für ihre Entwicklung verfeinerter und vereinfachter Methoden zur Messung magnetischer Kraftfelder.    Biografien   Felix Bloch, * Zürich 23. 10. 1905, ✝ Zürich 10. 9. 1983; 1928 Entdeckung… …   Universal-Lexikon

  • Purcell — Edward Mills …   Scientists

  • Edward M. Purcell — Edward Mills Purcell Pour les articles homonymes, voir Purcell. Edward Mills Purcell. Edward Mills Purcell (30 août 1912 7  …   Wikipédia en Français


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