Brebis Bleaney (born 6.06.1915) is an English physicist and a Fellow of the Royal Society (1950). He was born in London. He graduated from the University of Oxford (1937), where he worked from 1945 (in 1957-77 he was professor and director of the Clarendon Laboratory).
His research was in the field of solid-state physics, low-temperature physics, microwave spectroscopy, magnetism and electron paramagnetic resonance. He observed the hyperfine structure of paramagnetic resonance. Independently of R. Pound he proposed two methods of producing oriented nuclei (1951).
The C. Boys Prize (1950), the D. Hughes Medal (1962).