Defect recovery in aluminum irradiated with protons at 20 K

Journal Article · Wed Apr 15 00:00:00 EDT 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.5524· OSTI ID:6810818

Linderoth, S; Rajainmaeki, H; Nieminen, R M

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.

• Research Organization: Laboratory of Applied Physics II, Technical University of Denmark, DK-2800 Lyngby, Denmark
• OSTI ID: 6810818
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 35:11
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
PHYSICAL RADIATION EFFECTS
ATOMS
BINDING ENERGY
HIGH TEMPERATURE
HYDROGEN
ION COLLISIONS
IRRADIATION
LIFETIME
LOW TEMPERATURE
MEDIUM TEMPERATURE
MEV RANGE 01-10
MONOCRYSTALS
POSITRONS
PROTONS
RECOVERY
VACANCIES
VERY LOW TEMPERATURE
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BARYONS
COLLISIONS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
ENERGY RANGE
FERMIONS
HADRONS
LEPTONS
METALS
MEV RANGE
NONMETALS
NUCLEONS
POINT DEFECTS
RADIATION EFFECTS
360106* - Metals & Alloys- Radiation Effects