Response to "Comment on `Direct observation of stretched-exponential relaxation in
low-temperature Lennard-Jones systems using the cage correlation
function'
Eran Rabani1, J. Daniel Gezelter2, and B. J. Berne3
1 School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel
2 Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
3Department of Chemistry,
Columbia University,
3000 Broadway,
New York, New York 10027
In our recent letter [E. Rabani, J. D. Gezelter, and B. J. Berne, Phys. Rev. Lett. 82, 3649 (1999)] we used the cage correlation
function [E. Rabani, J. D. Gezelter, and B. J. Berne,
J. Chem. Phys. 107, 6867 (1997)]to observe relaxation behavior in
defective crystals. We observed a decay that was consistent with
stretched-exponential function with ß ~ 1/2 for the three temperatures we studied.
Zürcher and Keyes (ZK) describe the relaxation of the
cage-correlation function using a choice of rho(k) equivalent to a
sum of two delta functions in k (a bi-exponential model).
PACS numbers: 66.30.h, 02.70.Ns, 31.15.Qg, 61.43.Er
