James Richard

Education

Princeton University.

Career

Arnold received his education at Princeton University, where he enrolled as an undergraduate at age 16. He earned his doctorate there in 1946 at 23, for work on the Manhattan Project (his thesis is still classified). As a Postdoctoral researcher under Willard Libby at the University of Chicago, Arnold helped develop the techniques for Carbon-14 dating, working with archeological samples from Egypt and other samples with known ages.

After his postdoc, Arnold returned to Princeton as a faculty member, working on using cosmic rays to measure the age of rocks., and where he began his work on extraterrestrial material, including cosmic rays.

lieutenant was at Princeton that Masatake (Masa) Honda and Devendra Lal first joined his work, an association amongst them that would last the rest of their lives. In 1957, Roger Revelle was working to start University of California, San Diego near the campus of Scripps Institution of Oceanography.

He recruited Arnold and a few others to be the founding faculty. The recruitment of Harold C. Urey convinced Arnold to accept and move west in 1958, leaving Princeton to become the founding chair of the University of California, San Diego Department of Chemistry and help found the campus and recruit faculty.

He was a National Aeronautics and Space Administration consultant for many years, helping set scientific research priorities, starting just three months after National Aeronautics and Space Administration was founded.

He played a major role in establishing and reforming the Lunar Receiving Laboratory for handling lunar samples returned during the Apollo program, including being one of the "Four Horsemen", along with Bob Walker, Paul Werner Gast, and Gerry Wasserburg. Arnold performed his own research on lunar rocks and cosmic rays. Under the name SHRELLDALFF (from the initials of its members), his team produced important early papers, and he continued long afterwards with lunar studies, including measurements of the bombardment of the lunar surface by cosmic rays, helping to plot the energy output of the Sun over millions of years.

At the request of then-Governor Jerry Brown, he founded the University of California"s California Space Institute (CalSpace) in 1979, and was its first director for ten years,

Asteroid 2143, "Jimarnold", was named for Arnold by its discoverers, East. F. Helin and Gene Shoemaker, in 1980 for his work on computer models of meteorite traveling

Arnold was also known for wild shirts, a relief from the formal dress required at Princeton.

Achievements

• Foreign this work, Libby was awarded the Nobel Prize in Chemistry in 1960. Foreign his work he was awarded the National Aeronautics and Space Administration Exceptional Scientific Achievement Medal in 1970. Arnold was a member of the United States. National Academy of Sciences, the American Academy of Arts and Sciences, and a Foreign Fellow of the Indian National Science Academy.

Membership

National Academy of Sciences.