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

question 158

Multiple Choice

A beryllium-8 nucleus at rest undergoes double alpha decay as follows:
$^{8}_{4}$ Be → $^{4}_{2}$ He + $^{4}_{2}$ He The known atomic masses are:
$^{4}_{2}$ He: 4.002603 $^{8}_{4}$ nd{array}\) 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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