A neutron emerging from a reactor moderator has kinetic energy eV

PHYSICS · Subjective · Fermi University Physics · Quantum Mechanics · Origins of quantum theory · Origins of quantum theory

Quantum Mechanics: From the Photon to the Hydrogen Atom, Ch Matter waves and wave-particle duality

Problem

A neutron emerging from a reactor moderator has kinetic energy K=0.040K = 0.040 eV. Treat it as a free non-relativistic particle. Take h=6.626×10−34h = 6.626\times10^{-34} J s, the neutron mass mn=1.675×10−27m_n = 1.675\times10^{-27} kg and 11 eV =1.602×10−19= 1.602\times10^{-19} J.Compute the de Broglie wavelength of the neutron, in nm.

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