## Wikipedia - Emissione stimolata (it) stimulated emission

https://doi.org/10.1351/goldbook.S06015
That part of the emission which is induced by a resonant perturbing electromagnetic field. The transition between states, n and m, is governed by the @[email protected] @[email protected] of stimulated emission, $$B_{nm}$$. CIDNP emission and @[email protected] action are examples of processes which require stimulated emission.