Abstract
We have measured the attenuation of a supersonic helium beam scattered from the (001) surface of LiF as a function of surface temperature. We found that over an extended temperature range (140500 K) a simple model for the Debye-Waller factor can explain the data. At higher temperatures (500650 K) anharmonic effects become noticeable. Our data indicate that present models describing the Debye-Waller attenuation need improvements in this temperature range. The observed sudden drop of the He-beam reflected intensity at about 780 K is discussed in terms of surface disorder.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 10374-10377 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 37 |
| Issue number | 17 |
| DOIs | |
| State | Published - 1988 |
ASJC Scopus subject areas
- Condensed Matter Physics