Ej. Robinson, ON THE VALIDITY OF AN APPROXIMATION METHOD FOR 2-COLOR PHOTODETACHMENT, Journal of physics. B, Atomic molecular and optical physics, 28(19), 1995, pp. 595-599
The validity of an approximation method used by Bivona at al for two-c
olour photodetachment is investigated. It is found that while their ap
proach may be valid for some S-matrix elements, in others, contributio
ns neglected in the scheme are much larger than the terms that are ret
ained. In addition, an explanation is suggested for the linear depende
nce found for the transition probability on final-state energy.