Background
Reynolds, John Hamilton was born on April 3, 1923 in Cambridge, Massachusetts, United States. Son of Horace Mason and Catharine (Coffeen) Reynolds.
Reynolds, John Hamilton was born on April 3, 1923 in Cambridge, Massachusetts, United States. Son of Horace Mason and Catharine (Coffeen) Reynolds.
He studied first at Harvard University and, after serving in the Navy during World World War II, at the University of Chicago. There, he was influenced by his Doctor of Philosophy thesis advisor Mark Inghram and by two other famous physicists, Harold Urey and Enrico Fermi.
He specialized in mass spectrometry and utilized this method to determine isotope ratios needed for the radiometric dating of geologically and cosmologically relevant samples. In 1950 he was appointed as professor to the University of California, Berkeley where he continued his research on isotope ratios in meteorites, leading to the discovery in 1960 that the Richardton meteorite and other meteorites had an excess of xenon-129, thought to be a result of the beta decay of iodine-129 in the early solar system. His improvement of potassium-argon dating was adopted by several institutions.
Reynolds was elected to the National Academy of Sciences in 1968.
He died of pneumonia on November 4, 2000 in Berkeley, California, United States of America.
Lieutenant United States Naval Reserve, 1943-1946. Fellow American Association for the Advancement of Science, American Academy Arts and Sciences, American Physical Society, American Geophysical Union, Geochem. Society, European Association Geochemistry, California Academy Sciences (honorary), Meteoritical Society (Leonard medal 1973).
Member NAS (J. LawrenceSmith medal 1967), Faculty Club (Berkeley), Phi Beta Kappa.
Married Ann Burchard Arnold, July 19, 1975. Children from previous marriages: Amy, Horace Marshall, Brian Marshall, Karen Leigh, Petra Catharine.