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Fig. 10

image

Number of porous aggregates (dark gray) and compact particles (light gray) on each targt set. The number of porous aggregates is determined by assuming that all aggregates collected during a fragmentation event originate from a single aggregate. The compact particles on the other hand are counted as independent particles. The error bars are derived from Tables 1 and 2 of Gehrels (1986) and represent the upper and lower limit of the Poisson single sided distribution for a 1σ confidence level. The images on the left show the target holders after the end of the whole period in which they were exposed.

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