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Figure 4
Loci of allowable ω and Q values (dotted lines) on D22 with a sample-to-detector distance of 1.5 m for neutron energy gain (phonon annihilation). A reduced zone scheme is used so that all possible phonon annihilation processes are included (normal and Umklapp). The upper and lower dotted lines correspond to scattering angles (2θ) of 0 and 24.3°, respectively. The solid lines are fits to the silicon dispersion curves for the [100] direction under the reduced zone scheme from Dolling (1963BB2).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 39| Part 1| February 2006| Pages 46-52
https://doi.org/10.1107/S0021889805033698
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