Question 239: Atoms & Nuclei

Question

A nucleus with mass number 184 initially at rest emits an $$\alpha$$-particle. If the Q value of the reaction is 5.5 MeV, calculate the kinetic energy of the $$\alpha$$-particle.

Accepted Answer

$${k_\alpha } + {k_N} = 5.5$$
$$k = {{{p^2}} \over {2m}}$$
$$ \Rightarrow {{{k_\alpha }} \over {{k_N}}} = {{180} \over 4} = 45$$
$$ \Rightarrow {k_\alpha } = {{45} \over {46}} 	imes 5.5$$ MeV
= 5.38 MeV

Answer

5.5 MeV

Answer

5.0 MeV

Answer

5.38 MeV

Answer

0.12 MeV

Atoms & Nuclei

A nucleus with mass number 184 initially at rest emits an $\alpha-particle. If the Q value of the reaction is 5.5 MeV, calculate the kinetic energy of the \alpha$-particle.

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