Question

Which one of the following is correct about $\gamma -rays$?

• A. They are emitted before $\alpha$ and $\beta -rays$
• B. They are emitted after $\alpha$ and $\beta -rays$
• C. They are emitted simultaneously with $\alpha$ and $\beta$ rays
• D. They are emitted along with $\alpha -rays$ or along with $\beta$

Answer 1

The correct option is B They are emitted after $\alpha$ and $\beta -rays$

They are emitted after α and β−rays is correct about γ−rays.

A beta particle, also called beta ray or beta radiation, (symbol β) is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay. There are two forms of beta decay, β− decay and β+ decay, which produce electrons and positrons respectively.

Beta radiation is radiation due to beta particles, which are electrons (or, sometimes, positrons); mostly, when you come across the words 'beta radiation', what is meant is what is produced by beta decay (radioactive decay which produces beta particles either electrons or positrons).