Nuclei - Result Question 73

74. In the nuclear decay given below:

[2009]

$ _Z^{A} X \longrightarrow _{Z+1}^{A} Y \longrightarrow _{Z-1}^{A-4} B^{*} \longrightarrow _{Z-1}^{A-4} B$,

the particles emitted in the sequence are

(a) $\gamma, \beta, \alpha$

(b) $\beta, \gamma, \alpha$

(c) $\alpha, \beta, \gamma$

(d) $\beta, \alpha, \gamma$

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Answer:

Correct Answer: 74. (d)

Solution:

  1. (d) $ _Z^{A} X \longrightarrow _{Z+1}^{A} Y: \beta, \underset{Z+1}{A} Y \longrightarrow _{Z-1}^{A-4} B^{*}: \alpha$

$ _{Z-1}^{A-4} B^{*} \longrightarrow _{Z-1}^{A-4} B: \gamma \quad(\beta, \alpha, \gamma) $

Mass number and charge number of a nucleus remains unchanged during $\gamma$ decay)