But for some crystals flash-cooling is better at temperatures higher
than in the 77 K to 100 K regime for unknown reasons. This can be one
reason why flash-cooling in the gas stream occassionally is better.
It is also why liquid propane worked for Raji E. and Karolin L.: they
were using a temperature above the freezing point of propane.
Hi Jim,
could the reason for this be cold annealing ? You have an imperfect
crystal lattice which thanks to the slow cooling can adjust it's lattice
slightly to yield better diffracting crystals ? In my simple mind this
is how I imagine flash annealing procedures.
Juergen
--
Jürgen Bosch
University of Washington
Dept. of Biochemistry, K-426
1705 NE Pacific Street
Seattle, WA 98195
Box 357742
Phone: +1-206-616-4510
FAX: +1-206-685-7002
Web: http://faculty.washington.edu/jbosch
