James Chadwick

Also found in: Wikipedia.

Chadwick, James


Born Oct. 20, 1891, in Manchester; died July 24, 1974. English physicist. Fellow of the Royal Society of London (1927). Student of E. Rutherford.

Chadwick graduated from the University of Manchester and received the Ph.D. degree from Cambridge University. From 1923 to 1935 he taught at Cambridge University and was assistant director of the Cavendish Laboratory. From 1935 to 1948 he was a professor at the University of Liverpool. Beginning in 1948, he was master of Gonville and Caius College at Cambridge University.

Chadwick’s main works were devoted to nuclear physics. His first papers were on radioactivity. In 1920, Chadwick experimentally confirmed that the charge of a nucleus was equal to the atomic number of the element. He then studied the artificial transmutation of elements under the action of alpha particles (with Rutherford). One of his major contributions was the discovery in 1932 of the neutron upon bombardment of a beryllium target by a stream of alpha particles, for which he was awarded a Nobel Prize in 1935. In 1934–35, Chadwick and his co-worker M. Goldhaber set up experiments on the photodissociation of the deuteron into a neutron and proton under the action of gamma quanta. From 1943 to 1945, Chadwick headed the group of British scientists who were working at the Los Alamos Laboratory (United States) on the atomic bomb.


Radiations From Radioactive Substances . . ., [2nd ed.]. Cambridge, 1951. (With E. Rutherford and C. Ellis.)
“Possible Existence of a Neutron.” Nature, 1932, vol. 129, no. 3252.
Radioaktivnost’ i radioaktivnye veshchestva. Leningrad, 1935. (Translated from English.)


Neitron: Predystoriia, otkrytie, posledstviia. Moscow, 1975.
References in periodicals archive ?
MURDER victim James Chadwick lay in his flat for days before his body was found, say police.
The couple: Rachel Kilby, 44, head of music services for Rhondda Cynon Taff (RCT) and James Chadwick, 48, a guitar teacher for the music service in RCT.
March 27, 1950 Huddersfield Chief Constable James Chadwick said 'juvenile delinquents' were getting too many chances and called for tougher measures.
FOUNDATION First head of St Cuthbert's, James Chadwick, Bishop of Hexham and Newcastle FORMER PUPIL Musician Sting STANDARDS Head of St Cuthbert's Gerard Murphy HISTORY The St Cuthbert's football team and school officials in 1924-5 season
James Chadwick discovers the neutron, an uncharged particle in the atomic nucleus (3/5/32, p.
For which discovery did Sir James Chadwick win the Nobel physics prize in 1935?
James Chadwick will be bringing his quartet to the weekly session in Stratford and will be joined by trumpeter Ben Thomas, bassist Erica Lyons and drummer Lee Goodall.
The staff at Design2Print proudly show off their new certification to use FSC and PEFC products, which are sourced exclusively from well-managed forests worldwide Printer James Chadwick and director Arwel Hughes
Bishop James Chadwick - 2nd Bishop of Hexham and Newcastle.
The fact that the union dismissed its lawsuit says that they recognized it didn't have any merit," said James Chadwick, a media and entertainment-industry attorney representing the Daily News.
Valley went ahead thanks to youngster James Chadwick, only for Anchor to claim a share of the spoils with a Thomas Rockville volley.
An English radiation oncologist practicing in New Hampshire, Brown has also written a biography of James Chadwick, who discovered the neutron.