Test Index

Atoms and Nuclei

Section: Physics

Question : 5 of 33

Marks: +1, -0

Solution:

Step 1. Typical energy scale of atomic levels

Atomic energy levels (like in the hydrogen atom) are of the order of electron volts (eV).

E_{\;\text{atomic }\;} \sim 1\;\text{eV}

Step 2. Typical energy scale of nuclear levels

Nuclear energy level spacings are typically in the range of MeV (mega electron volts):

E_{\;\text{nuclear }\;} \sim 1\;\text{MeV}=10^6\;\text{eV}

Step 3. Ratio of orders

\;\frac{E_{\;\text{nuclear }\;}}{E_{\;\text{atomic }\;}} \sim \;\frac{10^6\;\text{eV}}{1\;\text{eV}}=10^6

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