SINGLE-PARTICLE TRANSVERSE RESPONSE FUNCTION
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Simple expressions for the single-particle transverse (current) response function and its sum rule are derived in terms of the Wigner transforms (WT) of the single-particle wavefunctions, leading to a semiclassical interpretation of the results. For finite nuclei, the harmonic-oscillator (HO) model is used to derive simple analytic expressions for the transverse (current) response function and its sum rule. A comparison is made with the results of the Fermi-gas (FG) model.
