Abstract
An intracavity dye laser technique has been used to study the photodetachment of electrons from gaseous OH− ions in an ion cyclotron resonance (icr) spectrometer. Enhancement of the photodetachment effect by a factor of 6.8 when comparing the intracavity technique to a double‐pass experiment has been observed. Under the conditions of these experiments approximately 93% of the OH− ions in the icr cell undergo photodetachment using the intracavity technique.