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Double-quantum ionization cross-sections for hydrogen atom have been calculated for the more general exponential cosine screened coulomb (MGECSC) potential. The ionization cross-sections are calculated as a function of the wavelength of the incident photons, as well as the potential parameters,using linearly and circularly polarized radiation. The transition matrix elements are calculated using the efficient pseudostate summation technique which has proved to be very accurate in these calculations. Numerical data is also presented for the double-quantum ionization cross-sections for hydrogen atom under the effect of MGECSC potential.

Double quantum ionization cross-sections for more general exponential cosine screened coulomb potential