Complex sentence: These high energy muons are capable of penetration to considerable depths in water and soil, where they, striking atomic nuclei and (among other reactions) induce spallation reactions in which a neutron is liberated from the nucleus.
Split into simpler sentences: These high energy muons are capable of penetration to considerable depths in water and soil. There, in striking atomic nuclei, among other reactions they induce spallation reactions in which a neutron is liberated from the nucleus.