A Beryllium-8 Nucleus at Rest Undergoes Double Alpha Decay as Follows

question 68

Multiple Choice

A beryllium-8 nucleus at rest undergoes double alpha decay as follows:
Be →
He +
He
The known atomic masses are:
He: 4.002603 u
Be: 8.005305 u
What is the kinetic energy of each departing alpha particle? (1 u = 931.5 MeV/c²)

• A)46 keV
• B)65 keV
• C)92 keV
• D)130 keV
• E)180 keV

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