| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1680952 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2012 | 5 Pages |
Hydrogen trapping and its interaction with defects in Li2TiO3 and Li2ZrO3 that were irradiated with hydrogen isotopes and exposed to air were investigated using ion beam techniques and photo-stimulated luminescence (PSL) measurements. During irradiation with 10 keV H2+, the incident hydrogen was trapped in Li2TiO3 at the end of its trajectory until the local concentration reached 12.5 at.%, whereas an increase in the hydrogen retained in Li2ZrO3 was observed at a considerably greater depth as compared to the projected range. A broad PSL emission with two peaks at around 2.8 and 3.1 eV was observed under irradiation of Li2ZrO3 with 5.17 eV light. The PSL intensity of the band at 2.8 eV showed a remarkable decrease as compared to the peak at 3.1 eV upon irradiation with 10 keV D2+. The results of isochronal annealing subsequent to irradiation showed that the recovery of the luminescence intensity in the 2.8 eV luminescent centers and release of hydrogen occurred in the same temperature range of 350–450 K. In addition, the formation of a Li2CO3 layer at the surface of Li2TiO3 and Li2ZrO3 following exposure to air was subject to the humidity conditions and was considered to play an important role in the dissociation of water vapor and hydrogen trapping beneath the reaction layer in Li2TiO3 and Li2ZrO3.
