A proton beam is stopped inside a target of enriched (molar mass )

PHYSICS · Subjective · Fermi University Physics · Nuclear Physics · Nuclear reactions · Nuclear reactions

The Nucleus Resolved, Ch Reactions: four-vectors, amplitudes and partial waves

Problem

A proton beam is stopped inside a target of enriched

^{63}\mathrm{Cu}

(molar mass

M = 63.0\,\mathrm{g\,mol^{-1}}

), driving the reaction

^{63}\mathrm{Cu}(p,n)^{63}\mathrm{Zn}

. Over the energy range spanned as the beam slows in the target, the excitation function averages to

\bar\sigma = 30\,\mathrm{mb}

, and the mass range difference between the entrance and stopping energies is

\Delta R = \int \mathrm{d}E \,/\,[(-\mathrm{d}E/\mathrm{d}x)/\rho] = 0.12\,\mathrm{g\,cm^{-2}}

. Calculate the yield

Y

in reactions per incident proton.