What is the difference in the p-wave and s-wave photodetachment in an electric field?

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By applying closed-orbit theory to an existing model, a simple formula is derived for the modulation function of s-wave photo-detachment in the presence of a static electric field. We then compare the s-wave modulation function with the p-wave modulation function. We show the maximums (minimums) in the s-wave modulation function correspond to the minimums (maximums) in the p-wave modulation function because of a phase difference of π in their oscillations. The oscillation amplitude in the p-wave modulation function can be larger than, smaller than or equal to the oscillation amplitude of s-wave modulation function when the angle between the laser polarization direction and the static electric field direction is tuned to be smaller than, larger than or equal to a special angle which is approximately 54.74∘.