We present collision experiments of centimetre projectiles on to decimetre targets , both made up of solid ice , at velocities of 15 \mathrm { m s ^ { -1 } } to 45 \mathrm { m s ^ { -1 } } at an average temperature of \mathrm { T _ { avg } } = 255.8 \pm 0.7 \mathrm { K } .
In these collisions the centimetre body gets disrupted and part of it sticks to the target .
This behaviour can be observed up to an upper threshold , that depends on the projectile size , beyond which there is no mass transfer .
In collisions of small particles , as produced by the disruption of the centimetre projectiles , we also find mass transfer to the target .
In this way the larger body can gain mass , although the efficiency of the initial mass transfer is rather low .
These collision results can be applied to planetesimal formation near the snowline , where evaporation and condensation is expected to produce solid ice .
In free fall collisions at velocities up to about 7 \mathrm { m s ^ { -1 } } , we investigated the threshold to fragmentation and coefficient of restitution of centimetre ice spheres .