The Kramers-Kronig transform analysis of the Cu DAFS and XAFS measurements
was done in two different ways. First, the Kramers-Kronig transform of the
normalized Cu(111) DAFS 
was compared to the XAFS 
(see
Fig. 6a); is dominated by 
since the
and contributions accidentally cancel. The agreement
is excellent. Second, the DAFS f' and f'' functions were extracted
from the raw data using the Kramers-Kronig method. The resulting f' and
f'' functions are compared in Fig. 6b with the
Cromer-Liberman 
and 
values.
The Kramers-Kronig method f' and f'' functions were splined to
determine the associated DAFS and functions. The
resulting and functions are compared with the normalized
Cu(111) DAFS in Fig. 6c and with the XAFS
signals in Fig. 6d. The agreement
between these signals is excellent. The Kramers-Kronig iterative fitting
procedure is clearly a very useful method for analyzing DAFS data.
