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A thermal neutron has a speed v at temperature T = 300 K and kinetic energy
m,v²
m = 3KT. Calculate its deBroglie wavelength. State whether a beam of these
neutrons could be diffracted by a crystal, and why?
(b) Use Heisenberg's Uncertainty principle to estimate the kinetic energy (in
MeV) of a nucleon bound within a nucleus of radius 10-15 m.

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