BRIEF COMMUNICATIONS: Dependences of the parameters of an optoacoustic signal on the radius of the excited region
Experimental and theoretical investigations were made of the dependence of the amplitude of an optoacoustic signal on the radius of a region excited by a focused beam. A linearized equation for the pressure was solved to show that the acoustic signal profile was governed primarily by the beam radius and that for r0 cτ it is proportional to r01/2. A series of experiments was carried out on the absorption in ozone and these experiments confirmed the r03/2 dependence for r0 < cτ.