. . "13559509-n"^^ . . . "0"^^ . "113559509"^^ . . "(physics) a nuclear reaction in which a bombarded nucleus breaks up into many particles; \"some astronomers believe that the solar system was formed by spallation when the sun was a very young star\""@en-us . "0"^^ . . "spallation"@en-us . "112795097"@en-us . "spallation"^^ . . . .