Q124 / 197 · NEET 2009 (Mains) · Physics

In the nuclear decay given below : $$ { }_{\mathrm{A}}^{\mathrm{A}} \mathrm{X} \longrightarrow \stackrel{\mathrm{A}}{\mathrm{A}+1} \mathrm{Y} \longrightarrow \mathrm{A}_{\mathrm{A}-4} \mathrm{~B}^* \longrightarrow \stackrel{\mathrm{A}-4}{\mathrm{Z}-1} \mathrm{~B} $$ The particles emitted in the sequence are :

  • A
    $\alpha, \beta, \gamma$
  • Correct answer
    B
    $\beta, \alpha, \gamma$
  • C
    $\gamma, \beta, \alpha$
  • D
    $\beta, \gamma, \alpha$

Solution

$$ \begin{aligned} & \mathrm{Z}^{\mathrm{X}^{\mathrm{A}} \stackrel{\beta}{\longrightarrow}} \mathrm{Z+1} \mathrm{Y}^{\mathrm{A}} \stackrel{\alpha}{\longrightarrow} \mathrm{Z}_{-1} \mathrm{~B}^{\mathrm{A}-4} \stackrel{\gamma}{\longrightarrow} \\ & \mathrm{Z}-1 \mathrm{~B}^{\mathrm{A}-4} \\ & \end{aligned} $$

Hence, the correct answer is option: 'B'.

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