Sequential irradiations of polycrystalline γ-LiAlO₂ pellets were performed at 573 K with He⁺ and D₂⁺ ions to overlap the deuterium (D) profile with the He⁺ ion damage peak. The D depth profiles were measured using time-of-flight secondary ion mass spectrometry before and after thermal annealing steps. A linear concentration gradient approximation is adopted to estimate the diffusion coefficient. The combined isothermal and isochronal data are used to determine the activation energy for D migration. At and above 1 × 10¹⁷ He⁺+D⁺/cm², a double-peak structure in the D profile is observed due to isotope exchange reaction. The D diffusion coefficient in the irradiated γ-LiAlO₂ pellets is on the order of 10⁻¹² cm²/s at 773 K for the first 2 min annealing and the average values between 5 and 60 min tend to decrease to 10⁻¹³ or 10⁻¹⁴ cm²/s, depending on the ion fluence. The activation energy for D migration is determined to be 1.0 ± 0.3 eV at 2 × 10¹⁶ He⁺+D⁺/cm² and 0.6 ± 0.3 eV at 1 × 10¹⁷ He⁺+D⁺/cm². The results from this study may help better understand and predict tritium diffusion behavior during neutron irradiation of γ-LiAlO₂ pellets.

多晶γ-LiAlO的顺序照射₂的粒料在573 K的他进行⁺和d _2个⁺离子重叠与他的氘（d）简档⁺离子损伤峰。在热退火步骤之前和之后，使用飞行时间二次离子质谱法测量D深度分布。采用线性浓度梯度近似来估计扩散系数。等温和等时数据的组合用于确定D迁移的活化能。大于等于1×10 ¹⁷ He ⁺ + D ⁺ / cm ²，由于同位素交换反应，在D轮廓中观察到双峰结构。在照射γ-LiAlO的d扩散系数₂丸粒在10的数量级上^-12 厘米² /秒，在773 K为第一2分钟退火和5分钟和60分钟之间的平均值趋于降低到10 ^-13或10 ^-14  cm ² / s，取决于离子通量。D迁移的活化能在2×10 ¹⁶ He ⁺ + D ⁺ / cm ^2时为1.0±0.3 eV，在1×10 ¹⁷ He ⁺ + D ⁺ / cm ^2时为0.6±0.3 eV。。这一研究结果可能有助于更好地理解和γ-LiAlO的中子辐照过程中预测氚扩散行为₂粒。