John Reynolds (physicist): Difference between revisions
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}}'''John Hamilton Reynolds'''<ref>[http://adsabs.harvard.edu/abs/1973Metic...8..291. The Leonard Medal], ''Meteoritics'' '''8''' (1973), pp. |
}}'''John Hamilton Reynolds'''<ref>[http://adsabs.harvard.edu/abs/1973Metic...8..291. The Leonard Medal], ''Meteoritics'' '''8''' (1973), pp. 291–293.</ref> (April 3, 1923–November 4, 2000) was an [[United States|American]] [[physicist]] and a specialist in [[mass spectrometry]].<ref name=im /> |
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==Life== |
==Life== |
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| issue = 7 |
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| pages = 351–354 |
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| year = 1960 |
| year = 1960 |
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| url = http://link.aps.org/abstract/PRL/v4/p351 |
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| issue = 1 |
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| year = 1960 |
| year = 1960 |
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| url = http://link.aps.org/abstract/PRL/v4/p8 |
| url = http://link.aps.org/abstract/PRL/v4/p8 |
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| doi = 10.1103/PhysRevLett.4.8 |
| doi = 10.1103/PhysRevLett.4.8 |
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| bibcode=1960PhRvL...4....8R}}</ref><ref name="NYtimes John Reynolds Xe">{{cite news|title=John Hamilton Reynolds, 77; Improved Study of Cosmic Ages|url=http://www.nytimes.com/2000/11/20/us/john-hamilton-reynolds-77-improved-study-of-cosmic-ages.html|accessdate=25 December 2012}}</ref> thought to be a result of the beta decay of [[iodine-129]] in the early [[solar system]].<ref> |
| bibcode=1960PhRvL...4....8R}}</ref><ref name="NYtimes John Reynolds Xe">{{cite news|title=John Hamilton Reynolds, 77; Improved Study of Cosmic Ages|url=http://www.nytimes.com/2000/11/20/us/john-hamilton-reynolds-77-improved-study-of-cosmic-ages.html|accessdate=25 December 2012}}</ref> thought to be a result of the beta decay of [[iodine-129]] in the early [[solar system]].<ref>{{cite book| author = Alan P. Dickin| title = Radiogenic Isotope Geology| year = 1997| publisher = Cambridge University Press| isbn = 978-0-521-59891-0| page = 400 }}</ref> His improvement of [[potassium-argon dating]] was adopted by several institutions.<ref name="im">[http://content.cdlib.org/xtf/view?docId=hb1r29n709&doc.view=content&chunk.id=div00061&toc.depth=1&brand=oac&anchor.id=0 John H. Reynolds, Physics: Berkeley], Bruce A. Bolt, Richard E. Packard, and P. Buford Price, in ''University of California: In Memoriam, 2000'', edited by Micki Conklin, University of California Academic Senate, 2000. Accessed on line October 24, 2007.</ref><ref>{{cite book| author = Office of the Home Secretary| coauthors = National Academy of Sciences| title = Biographical Memoirs| year = 2004| publisher = National Academies Press| isbn = 978-0-309-10363-3| page = 248 |url = http://www.nap.edu/readingroom/books/biomems/jreynolds.html }}</ref> |
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Reynolds was elected to the [[United States National Academy of Sciences|National Academy of Sciences]] in 1968. He died of [[pneumonia]] on November 4, 2000 in [[Berkeley, California|Berkeley]], [[California]], [[USA]].<ref name=im /> |
Reynolds was elected to the [[United States National Academy of Sciences|National Academy of Sciences]] in 1968. He died of [[pneumonia]] on November 4, 2000 in [[Berkeley, California|Berkeley]], [[California]], [[USA]].<ref name=im /> |
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Revision as of 15:48, 23 July 2013
John Hamilton Reynolds | |
|---|---|
| Born | April 3, 1923 |
| Died | November 4, 2000 (aged 77) |
| Alma mater | Harvard University, University of Chicago |
| Known for | Discovery of excess meteoritic 129Xe |
| Scientific career | |
| Fields | Geophysics |
| Institutions | University of Chicago, University of California, Berkeley |
| Doctoral advisor | Mark Inghram |
John Hamilton Reynolds[1] (April 3, 1923–November 4, 2000) was an American physicist and a specialist in mass spectrometry.[2]
Life
John H. Reynolds was born April 3, 1923 in Cambridge, Massachusetts, USA. He studied first at Harvard University and, after serving in the Navy during World War II, at the University of Chicago. There, he was influenced by his Ph.D. 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,[3][4][5] thought to be a result of the beta decay of iodine-129 in the early solar system.[6] His improvement of potassium-argon dating was adopted by several institutions.[2][7]
Reynolds was elected to the National Academy of Sciences in 1968. He died of pneumonia on November 4, 2000 in Berkeley, California, USA.[2]
References
- ^ The Leonard Medal, Meteoritics 8 (1973), pp. 291–293.
- ^ a b c John H. Reynolds, Physics: Berkeley, Bruce A. Bolt, Richard E. Packard, and P. Buford Price, in University of California: In Memoriam, 2000, edited by Micki Conklin, University of California Academic Senate, 2000. Accessed on line October 24, 2007.
- ^ J. H. Reynolds (1960). "Isotopic Composition of Primordial Xenon". Physical Review Letters. 4 (7): 351–354. Bibcode:1960PhRvL...4..351R. doi:10.1103/PhysRevLett.4.351.
- ^ J. H. Reynolds (1960). "Determination of the Age of the Elements". Physical Review Letters. 4 (1): 8–10. Bibcode:1960PhRvL...4....8R. doi:10.1103/PhysRevLett.4.8.
- ^ "John Hamilton Reynolds, 77; Improved Study of Cosmic Ages". Retrieved 25 December 2012.
- ^ Alan P. Dickin (1997). Radiogenic Isotope Geology. Cambridge University Press. p. 400. ISBN 978-0-521-59891-0.
- ^ Office of the Home Secretary (2004). Biographical Memoirs. National Academies Press. p. 248. ISBN 978-0-309-10363-3.
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