Prominent role of multielectron processes in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>K</mml:mi></mml:math>-shell double and triple photodetachment of oxygen anions

Abstract

The absolute cross sections of double and triple photodetachment of O${}^{-}$ ions are measured with the photon-ion merged-beams technique, where good agreements are found between the measurements and the results from multiconfiguration Dirac-Fock calculations.