handy. Most solutions rely on correctly identifying the parity and spin of the last unpaired nucleon. 5. Ethical Use of Solutions Using a solution manual as a primary study tool
Krane respects the "Fermi estimate." If the problem asks for the radius of a (^208\textPb) nucleus, use (R = R_0 A^1/3) with (R_0 = 1.2 \text fm) before doing a more precise calculation. Write the approximation explicitly. This is often half the credit.
Since the $\pi^0$ is at rest, its total energy is $E_\pi = m_\pic^2$. By conservation of energy, $E_\pi = E_\gamma_1 + E_\gamma_2$.
They usually show the step-by-step math, which is helpful when you're stuck on a tricky integration or unit conversion.