ScienceJuly 9, 2026
spallation
/spəˈleɪʃən/
Definition
A nuclear reaction where a high-energy particle strikes a heavy atomic nucleus, causing it to fragment and emit secondary particles like neutrons.
Etymology
Derived from the English word 'spall,' meaning to break off chips or fragments from a solid material, which itself comes from Middle English and Old French roots related to splitting or breaking.
In the news
In the article, spallation is the process triggered when high-energy protons in space collide with the nuclear material inside a secret weapon, creating a detectable 'neutron signal' for inspector satellites.
Scientist models way to make sure no one's violating the ban on nuclear weapons in space
Read the full article ↗The Register