Abstract
Samples of 238Pu-substituted zirconolite (CaPuTi 2O 7) were stored near room temperature to allow accumulation of alpha recoil damage. Differential thermal analysis was employed to measure release of stored energy accompanying recrystallization, after damage had proceeded for times from 35 days ( 4.7 × 10 24 alpha decays/m 3 ) to 1198 days ( 1.6 × 10 26 α/m 3 ). It was found that three parameters related to energy release (amount of stored energy, transformation temperature, and abruptness of transformation) were dependent on damage dose. Results are interpreted in terms of the quantity and distribution of remanent crystallinity, and of the consequences of redamage to once-damaged material.
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