The specular reflectivities of picosecond and subnanosecond high-intensity light pulses from a gold target are investigated and compared. It is found that the reflectivity for a picosecond pulse is several times higher than for a subnanosecond one and that dependences of the reflectivity on light pulse energy or intensity are different for both kinds of pulses. A qualitative explanation of the observed features of reflectivity is provided.
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