Tamilnadu BoardEnglish MediumSTD 10ScienceNuclear Physics1 Mark
Question
What is alpha decay (α decay)? give an example.
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Answer
A nuclear reaction in which an unstable parent nucleus emits an alpha particle and forms a stable daughter nucleus is called 'alpha decay'. E.g. Decay of uranium $\left( U ^{238}\right)$ to thorium $\left( Th ^{234}\right)$ with the emission of an alpha particle. ${ }_{92} U ^{238} \rightarrow{ }_{90} Th ^{234}+{ }_2 He ^4(\alpha-$ decay $)$.
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