Minima and maxima in the generalized oscillator strength (GOS) are studied as a function of momentum transfer for allowed transitions in lithium atom using the Glauber approximation. The results of the present calculations have been compared with the first Born approximation. The results indicate that the Glauber approximation predicts the occurrence of these extrema and their positions shift with energy of the incident particle, in contrast to the results of Born approximation. The total excitation cross sections are also obtained using the Glauber approximation and are compared with the Born calculations and the available experimental data.
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