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•  For a 4 MHz AT-cut resonator, X-ray dose of 6 x 106 rads produced Df = 41 Hz.
•  Activiation energies were calculated from the temperature dependence of the
   annealing curves.  The experimental results can be reproduced by two
   processes, with activation energies E1 = 0.3 ± 0.1 eV and E2 = 1.3 ± 0.3eV.
•  Annealing was complete in less than 3 hours at > 2400C.
x
x
x
x
x
x
x
x
x
x
x
x
-Df
40
20
0
Text Box: Frequency change, Hz
Frequency change, Hz
100
200
300
x
DfS = 41 Hz
X  T= 4330K (1600C)
X  T= 4540K
X  T= 4680K
X  T= 4880K (2150C)
Annealing time, minutes
T = 5130K(2400C)
Annealing of Radiation Induced f Changes
P. Freymuth and G. Sauerbrey, "Ausheilung von Bestrahlungsschaden in Quarz- Schwingkristallen," J. Phys. Chem. Solids, Pergamon Press, Vol. 24, pp. 151-155, 1963.