In a decay process ${ }_Z^A X$ changes into ${ }_{Z-1}^A Y$. Which process is this?

In a decay process ${ }_Z^A X$ changes into ${ }_{Z-1}^A Y$. Which process is this?
  1. $\beta$-decay
  2. $\beta^{+}$-decay
  3. $\alpha$-decay
  4. $\gamma$-decay.

Solution

${ }_Z^A X \longrightarrow{ }_{Z-1}^A Y+{ }_{+1}^0 e\left(\right.$ or $\left.\beta^{+}\right)$

Asked in: NEET 2009 (Screening)

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