Journal article
Defect recovery in aluminum irradiated with protons at 20 K
Department of Energy Conversion and Storage, Technical University of Denmark1
Management, Department of Energy Conversion and Storage, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark4
Fuel Cells and Solid State Chemistry Division. Management, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark5
Aluminum single crystals have been irradiated with 7.0-MeV protons at 20 K. The irradiation damage and its recovery are studied with positron-lifetime spectroscopy between 20 and 500 K. Stage-I recovery is observed at 40 K. At 240 K, loss of freely migrating vacancies is observed. Hydrogen in vacancies is found to stabilize the vacancies and prolong stage III to above 280 K, where the hydrogen bound to vacancies is released.
Single and multiple occupancy of hydrogen atoms at monovacancies is put forward as the reason for the two recovery stages between 280 and 400 K. A binding energy of 0.53±0.03 eV is found for a hydrogen atom trapped at a monovacancy. The results are in excellent agreement with recent ion-beam-analysis results and also with theoretical estimates.
| Language: | English |
|---|---|
| Year: | 1987 |
| Pages: | 5524-5528 |
| ISSN: | 10953795 , 01631829 , 1550235x , 10980121 and 24699950 |
| Types: | Journal article |
| DOI: | 10.1103/PhysRevB.35.5524 |
| ORCIDs: | Linderoth, S. |
