
TY  - JOUR
A1  - Willis, BTM 
T1  - Measurement of Thermal Diffuse Scattering Using Pulsed Neutron Diffraction
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1988
VL  - 41
IS  - 3
SP  - 477
EP  - 488
KW  - 
UR  - https://doi.org/10.1071/PH880477 
N2  - Collective excitations in crystals can be examined with neutrons by means of the so-called 'diffraction method', without carrying out an energy analysis of the inelastically scattered neutrons. For studying thermal diffuse scattering (I'DS) from acoustic phonons, it is particularly advantageous to employ a white source of pulsed neutrons instead of a monochromatic source of reactor neutrons. Provided that the neutron velocity is less than the sound velocity in the crystal, each reciprocal-lattice point observed in backscattering Laue geometry is associated with a wavelength window within which TDS is forbidden. The edges of the window are readily measured to give the sound velocity as a function of the direction of propagation. 
ER  -

