Lyle Benjamin Borst (November 24, 1912 – July 30, 2002) was an American nuclear physicist and inventor.

[4] Borst worked as a senior physicist on the Manhattan Project from 1943 to 1946 at the Clinton Laboratories in Oak Ridge, Tennessee.

In 1944 Ernest O. Wollan and Borst used neutron diffraction to produce "rocking curves" for crystals of gypsum and sodium chloride (salt).

[5][6] In 1946 Karl Z. Morgan and Borst at Oak Ridge develop a film badge to measure worker exposure to fast neutrons.

In 1969 he served as master of Clifford Furnas College at the State University of New York at Buffalo.