In a low-energy neutron-proton scattering experiment only the -wave contributes

PHYSICS · Subjective · Fermi University Physics · Quantum Mechanics · Scattering theory · Scattering theory

The Nucleus Resolved, Ch The deuteron and what two nucleons do to each other

Problem

In a low-energy neutron-proton scattering experiment only the

s

-wave contributes. At centre-of-mass wavenumber

k = 0.185\,\mathrm{fm^{-1}}

the measured

s

-wave phase shift is

\delta_0 = 42.3^\circ

. Calculate the

s

-wave cross section

\sigma_0

, in barns (

1\,\mathrm{b} = 100\,\mathrm{fm^2}