
Figure 8
Variation of the Bragg peak position with surface pressure. Black symbols correspond to the data from the present study: solid circles  Q_{z} components of the 02 peak; open circles  Q_{xy} components of the 02 peak; open triangles  Q_{z} components of the 11 peak; solid triangles  Q_{xy} components of the 11 peak. Red symbols represent data from Dupres et al. (2003): open squares  Q_{xy} components of the 02 peak; solid squares  Q_{xy} components of the 11 peak. 