| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
H-24: Damage Evolution in Apatite Irradiated with Alpha Emitters |
| Author(s) |
Dee Jay Cerico, Frederico Garrido, Cécile Gautheron, Lech Nowicki, Cyril Bachelet, Jérôme Bourçois, Sandrine Picard, Aurelie Gentils |
| On-Site Speaker (Planned) |
Aurelie Gentils |
| Abstract Scope |
Apatite ceramics is a possible host matrix for actinides separated from high-level nuclear wastes. To determine the radiation tolerance of apatite to actinide decay at room temperature and at 200°C, an ion beam analysis technique known as Rutherford Backscattering Spectrometry in channeling mode (RBS/C) was utilized in this study. Through RBS/C, the individual contribution of both alpha particles and recoil nuclei to the alpha decay-induced defects creation was obtained at ion fluences ranging from a few 1012 cm-2 to a few 1017 cm-2. Damage kinetics follows a single ion direct impact model for both projectiles and the regular increase of damage level can be ascribed to the formation of radiation-induced defects. In the high fluence regime, however, the formation of overpressurized He gas bubbles plays a decisive role to the damage evolution and eventual material destabilization. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |