Ann Catherine Horton (née Davies, 7 April 1894 – 15 July 1967) was a British physicist and academic who was the first woman to be appointed to the lecturing staff of the Cavendish Laboratory.
[1] Her research chiefly concerned radiation from and ionization potentials of the rare gases, and contributed to the verification of Niels Bohr's theory of stationary states.
[5] In 1921, their work called into question the conclusions drawn from the Franck–Hertz experiment, leading to an exchange of correspondence with James Franck that eventually concluded with all participants agreeing that the Franck–Hertz results had been correct.
[1][3] From this point she carried out no further original research, but focused on teaching and administration.
[1] In 1968, Cambridge founded the Ann Horton Visiting Research Fellowship at her bequest.