Bernice Weldon Sargent, MBE, FRSC (24 September 1906 – 17 December 1993) was a Canadian physicist who worked at the Manhattan Project's Montreal Laboratory during the Second World War as head of its nuclear physics division.

[1] In 1928, Sargent was awarded an 1851 Research Fellowship, which allowed him to travel to England to study at the Cavendish Laboratory at the University of Cambridge under Ernest Rutherford.

His 1932 doctoral thesis, written under the supervision of Rutherford and Charles Drummond Ellis, on "The Disintegration Electrons",[1] subsequently published in the Proceedings of the Royal Society, described relationship between the radioactive disintegration constants of beta particle-emitting radioisotopes and corresponding logarithms of their maximum beta particle energies.

In 1943, he took a leave of absence from Queen's University to join the Anglo-Canadian Montreal Laboratory, which subsequently became part of the Manhattan Project.

[1] In 1951, Sargent left the Chalk River Laboratories to return to Queen's University as the head of its physics department and, from 1954 to 1972, as its R.S.