lõhustumine - aatomituuma muundumine kaheks (harvemini enamaks) ligikaudu võrdse massiga kildtuumaks. Raske tuuma lõhustumisel vabaneb energiat ja kiirgub mitu neutronit, mis võivad tekitada ahelreaktsiooni. Lõhustumine võib toimuda neutronite, prootonite, footonite jt osakeste mõjul või spontaanselt.
the splitting of a heavy nucleus,with release of neutrons and liberation of energy
division of a heavy nucleus into two or, rarely, more parts with masses of equal order of magnitude, usually accompanied by the emission of neutrons, gamma rays and, rarely, small charged nuclear fragments
Cooperation relating to nuclear fission research and development in such fields as safety, radiological protection, health and the environment, and safeguards may be subject to specific agreements between the Community and the United States of America.
