a splitting of spectral lines observed when the source of a radiation is subjected to a strong magnetic field, caused when the vectors associated with the spin and orbital angular momentum exhibit individual rather than common precession.
Compare Zeeman effect.
Origin of Paschen-Back effect
1920–25; named after Friedrich Paschen (1865–1947) and Ernst Back (1881–1959), German physicists
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019