Peter John Twin (born 26 July 1939 in London)[1] is a British experimental nuclear physicist.
He is known for his research into the structure of atomic nuclei, based upon his pioneering work on techniques of gamma ray spectroscopy and, specifically, the Total Energy Suppression Shield Array (TESSA).
[2] In 1986 his science team discovered superdeformed nuclei with a high spin (with an observation of a yrast line in the gamma spectrum).
[6] In retrospect, the phenomenon was also observed in 1962 when spontaneous fission of isomers in heavy nuclei was discovered by Sergey Polikanov (1926–1994).
[7] Following the success of TESSA III, he collaborated with Francis Beck, director of the Centre de recherches nucléaires (CRN) at Strasbourg, on leading the French-British development of the more advanced gamma ray detectors of the Eurogam project.