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Science in China Series G
Using the time-dependent perturbation theory and the calculation formula of the single-and double-pulse absorption spectra of the atom in strong external fields, we calculate the single-and double-pulse absorption spectra of Li atom in strong magnetic field for different pulse widths. The results show that a pulse of some width can reduce the contribution of the short period closed orbits and eliminate the contribution of the long period orbits. Compared with the single-pulse absorptiondoi:10.1007/s11433-006-0178-0 fatcat:xeof2stccfbtdexmtzydqghweu