In 1946, after the war, Chamberlain continued with his doctoral studies at theUniversity of Chicago under physicistEnrico Fermi.[4] Fermi acted as an important guide and mentor for Chamberlain, encouraging him to leave behindtheoretical physics forexperimental physics, for which Chamberlain had a particular aptitude. Chamberlain received hisPhD from the University of Chicago in 1949.
In 1948, having completed his experimental work, Chamberlain returned to Berkeley as a member of its faculty. There he, Segrè, and other physicists investigated proton-proton scattering. In 1955, a series of proton scattering experiments at Berkeley'sBevatron led to the discovery of the anti-proton, a particle like a proton but negatively charged. Chamberlain's later research work included thetime projection chamber (TPC), and work at theStanford Linear Accelerator Center (SLAC).
Chamberlain was politically active on issues of peace and social justice, and outspoken against theVietnam War. He was a member of Scientists for Sakharov, Orlov, and Shcharansky, three physicists of the formerSoviet Union imprisoned for their political beliefs. In the 1980s, he helped found thenuclear freeze movement. In 2003 he was one of 22 Nobel Laureates who signed theHumanist Manifesto.[5]
Chamberlain was diagnosed withParkinson's disease in 1985, and retired from teaching in 1989. He died of complications from the disease on February 28, 2006, in Berkeley at the age of 85.
^"Notable Signers".Humanism and Its Aspirations. American Humanist Association. Archived fromthe original on November 13, 2016. RetrievedSeptember 15, 2012.
^Appel, JM. (2015)Miracles and Conundrums of the Secondary Planets, Black Lawrence Press.
