## Scattering of neutrons in polycrystals |

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absorption cross section associated Laguerre function assumption binding energy calculate the cross Chemical Binding composite system consisting cross section assume cross section computed Debye crystal Debye model discontinuous function Einstein crystal Einstein model ejection elastic and inelastic elastic cross section elastic scattering ellipsoid emission absorption equilibrium position Fhys formula free nucleus frequencies given by equations given by Fermi Hammermesh and Johnson Hence higher order collisions higher order inelastic incoherent inelastic scattering initial and final integral isotropic KDDC Large Compared lattice vibrations matrix element maximum momentum MDDC monocrystal neutron and nucleus neutron energies order inelastic collisions order inelastic cross orthonormalized phonons Physik R. G. Sachs recoil direction result Scattering Cross Section scattering nucleus SECTION IN BARNS single crystal Single Oscillator Functions solid angle struck nucleus term3 thermal region total cross section total elastic cross transition UDDC unit cell wave function Weinstock