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John Reynolds (physicist)

 

 
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John Reynolds (physicist)
 
 
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John Hamilton Reynolds (April 3, 1923–November 4, 2000) was an American
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
 physicist
Physicist

A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many Physics#Major fields of physics spanning all length scales: from atom particles of which all ordinary matter is made to the behavior of the material Universe as a whole ....
 and a specialist in mass spectroscopy.

H. Reynolds was born in Cambridge
Cambridge, Massachusetts

Cambridge is a city in the Greater Boston area of Massachusetts, United States. It was named in honor of the University of Cambridge in England....
, Massachusetts
Massachusetts

The Commonwealth of Massachusetts is a U.S. state located in the New England region of the Northeastern United States United States. It borders Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north....
, USA. He studied first at Harvard University
Harvard University

Harvard University is a private university in Cambridge, Massachusetts, Massachusetts, United States, and a member of the Ivy League. Founded in 1636 by the colonial Massachusetts legislature, Harvard is the Colonial Colleges institution of higher learning in the United States....
 and, after serving in the Navy during World War II
World War II

World War II, or the Second World War , was a global military conflict which involved a Participants in World War II, including all of the great powers, organised into two opposing military alliances: the Allies of World War II and the Axis powers....
, at the University of Chicago
University of Chicago

The University of Chicago is a private university located principally in the Hyde Park, Chicago neighborhood of Chicago. Although an older university by the same name existed prior to its founding, the modern University of Chicago credits its founding to the oil magnate John D....
. There, he was influenced by his Ph.D.
Ph.D.

Ph.D. or PHD may stand for:* Doctor of Philosophy, an academic degree* Ph.D. , a 1980s British group* Piled Higher and Deeper, a web comic strip...
 thesis advisor Mark Inghram
Mark Inghram

Mark G. Inghram was an United States physicist....
 and by two other famous physicists, Harold Urey
Harold Urey

Harold Clayton Urey was an American physical chemist whose pioneering work on isotopes earned him the Nobel Prize in Chemistry in 1934 and later led him to theories of planetary evolution....
 and Enrico Fermi
Enrico Fermi

Enrico Fermi was an Italian physicist most noted for his work on the development of the first nuclear reactor, and for his contributions to the development of Quantum mechanics, nuclear physics and particle physics, and statistical mechanics....
. He specialized in mass spectroscopy and utilized this method to determine isotope ratios needed for the radiometric dating
Radiometric dating

Radiometric dating is a technique used to date materials, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates....
 of geologically and cosmologically relevant samples.






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John Hamilton Reynolds (April 3, 1923–November 4, 2000) was an American
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
 physicist
Physicist

A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many Physics#Major fields of physics spanning all length scales: from atom particles of which all ordinary matter is made to the behavior of the material Universe as a whole ....
 and a specialist in mass spectroscopy.

Life

John H. Reynolds was born in Cambridge
Cambridge, Massachusetts

Cambridge is a city in the Greater Boston area of Massachusetts, United States. It was named in honor of the University of Cambridge in England....
, Massachusetts
Massachusetts

The Commonwealth of Massachusetts is a U.S. state located in the New England region of the Northeastern United States United States. It borders Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north....
, USA. He studied first at Harvard University
Harvard University

Harvard University is a private university in Cambridge, Massachusetts, Massachusetts, United States, and a member of the Ivy League. Founded in 1636 by the colonial Massachusetts legislature, Harvard is the Colonial Colleges institution of higher learning in the United States....
 and, after serving in the Navy during World War II
World War II

World War II, or the Second World War , was a global military conflict which involved a Participants in World War II, including all of the great powers, organised into two opposing military alliances: the Allies of World War II and the Axis powers....
, at the University of Chicago
University of Chicago

The University of Chicago is a private university located principally in the Hyde Park, Chicago neighborhood of Chicago. Although an older university by the same name existed prior to its founding, the modern University of Chicago credits its founding to the oil magnate John D....
. There, he was influenced by his Ph.D.
Ph.D.

Ph.D. or PHD may stand for:* Doctor of Philosophy, an academic degree* Ph.D. , a 1980s British group* Piled Higher and Deeper, a web comic strip...
 thesis advisor Mark Inghram
Mark Inghram

Mark G. Inghram was an United States physicist....
 and by two other famous physicists, Harold Urey
Harold Urey

Harold Clayton Urey was an American physical chemist whose pioneering work on isotopes earned him the Nobel Prize in Chemistry in 1934 and later led him to theories of planetary evolution....
 and Enrico Fermi
Enrico Fermi

Enrico Fermi was an Italian physicist most noted for his work on the development of the first nuclear reactor, and for his contributions to the development of Quantum mechanics, nuclear physics and particle physics, and statistical mechanics....
. He specialized in mass spectroscopy and utilized this method to determine isotope ratios needed for the radiometric dating
Radiometric dating

Radiometric dating is a technique used to date materials, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates....
 of geologically and cosmologically relevant samples. In 1950 he was appointed as professor to the University of California, Berkeley
University of California, Berkeley

The University of California, Berkeley is a public university research university located in Berkeley, California, California, United States. The oldest of the ten major campuses affiliated with the University of California, Berkeley offers some 300 undergraduate and graduate degree programs in a wide range of disciplines....
 where he continued his research on isotope ratios in meteorites, leading to the discovery in 1960 that certain meteorites had an excess of xenon
Xenon

Xenon is a chemical element represented by the chemical symbol Xe. Its atomic number is 54. A colorless, heavy, odorless noble gas, xenon occurs in the Earth's atmosphere in trace amounts....
-129, thought to be a result of the beta decay of iodine-129
Iodine-129

Iodine-129 is long-lived radioisotope of iodine which occurs naturally, but also is of special interest in the monitoring and effects of man-made nuclear fission decay products, where it serves as both tracer and potential radiological contaminant....
 in the early solar system
Solar System

The Solar System consists of the Sun and those Astronomical object bound to it by gravity: the eight planets and five dwarf planets, their 173 known Natural satellite, and billions of Small Solar System body....
. His improvement of potassium-argon dating
Potassium-argon dating

Potassium-argon dating or K-Ar dating is a radiometric dating method used in geochronology and archeology. It is based on measuring the products of the radioactive decay of potassium , which is a common element found in materials such as micas, clay minerals, tephra, and evaporites....
 was adopted by several institutions.

Reynolds was elected to the National Academy of Sciences
United States National Academy of Sciences

The National Academy of Sciences is a corporation in the United States whose members serve pro bono as "advisers to the nation on science, engineering, and medicine."...
 in 1968. He died of pneumonia
Pneumonia

Pneumonia is an Inflammation illness of the lung. Frequently, it is described as lung parenchyma/alveolus inflammation and abnormal alveolar filling with fluid ....
 on November 4, 2000 in Berkeley
Berkeley, California

Berkeley is a city on the east shore of San Francisco Bay in Northern California, in the United States. Its neighbors to the south are the cities of Oakland, California and Emeryville, California....
, California
California

California is a U.S. state on the West Coast of the United States of the United States, along the Pacific Ocean. It is bordered by Oregon to the north, Nevada to the east, Arizona to the southeast, and to the south the Mexico state of Baja California....
, USA.