nuclear targets. The hypernucleus formation occurred through the strangeness-exchange
reaction Kstop−+ ZA→ ZΛA+ π−. From the analysis of the momentum of the emerging π−,
binding energies and formation probabilities of LiΛ7, BeΛ9, CΛ13 and OΛ16 have been
measured and are here presented. The behavior of the formation probability as a function of
the atomic mass number A is also discussed.