Behavior of the absorptivity of metals under the action of laser radiation

Experimental data on the time dependence of the absorptivity A(t) of a copper target during the action of a single laser pulse are used to calculate the time dependence of the temperature of the illuminated surface T(t). The functions A(t) and T(t) are used to determine the temperature dependence of the absorptivity A(T) in the range 300–6000°K for λ=1.06 μ radiation. The possibilities and limitations of this method of determining A(T) are discussed.