Random sequential adsorption of coupled three-circle objects for various radius ratios

We study random sequential adsorption (RSA) of coupled three-circle objects (consisting of two circular discs of radius r(2) touching the central one of radius r(1) making an angle θ) on a two-dimensional continuum substrate. For all the objects corresponding to various values of radius ratios r(2)/r(1) and angles θ, approach of instantaneous coverage Θ(t) to the jammed state coverage Θ(∞), is found to obey a power law Θ(∞)-Θ(t)~t(-p), as expected based on general arguments. However, the observed values of exponent p and jammed state coverage Θ(∞) are found to vary with r(2)/r(1) and θ. The interplay between the degree of nonconvexity |δ| and packing efficiency η of the object governs the saturation coverage Θ(∞).