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Nuclei Physics Ncert Solutions Class 12th Physics Class 12th Physics NCERT Exemplar Solutions Class 12th Chapter Thirteen

M_e and M_s denote the atomic masses of the parent and he daughter nuclei respectively in radioactive decay. The Q value for a beta^-1 decay is Q₁ and that for beta+ decay is Q₂.if m_e denotes the mass of an electron, then which of the following statements is correct?

(a) Q₁=(M_x-M_y)c² and Q₂=[M_x-M_y-2m_e]c²

(b) Q₁=(M_x-M_y)c² and Q₂=[M_x-M_y]c²

(c) Q₁=(M_x-M_y-2m_e)c² and Q₂=[M_x-M_y-2C_e]c²

(d) Q₁=(M_x-M_y+2m_e)c² and Q₂=[M_x-M_y+2m_e]c²

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alok kumar singh | Contributor-Level 10

4 months ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Answer –a

Explanation- $β$ ⁺ decay represents

_zX^{A
$\to$}_z-1Y^A+₁e^o+v+Q₂

Q₂= [m_n (_zX^A)-m_n (_z-1Y^A)-m_e]c²

= (M_x-M_y-2m_e)c²

^{$β$
-}decay represents

_zX^{A
$\to$}_z+1Y^A+-₁e^o+v+ $\propto$ ₁

_{$\propto$
1}= [m_n (_zX^A)-m_n (_z+1Y^A)-m_e]c²

= (M_x-M_y)c²

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