Capture of positrons by radiation defects in germanium

Journal Article · Mon Aug 01 04:00:00 EDT 1977 · Sov. Phys. - Semicond. (Engl. Transl.); (United States)

OSTI ID:5230170

Arifov, P U; Arutyunov, N Y; Il'yasov, A Z

It was found that the positron annihilation method could be used to study the thermodynamic characteristics of disordered regions in germanium. The method of angular correlation of the annihilation ..gamma.. rays was used to study positron annihilation in germanium irradiated with fast reactor neutrons. The results indicated that positrons were captured by defects formed as a result of neutron irradiation. A study of the influence of isochronous annealing (involving measurement of the counting rate at the maximum of the angular correlation curve) revealed the existence of two stages of annealing of those defects which acted as the positron-capture centers. The first stage was described by a chemical kinetics equation of the first order with an activation energy of 0.18 eV and attributed tentatively to the ''evaporation'' of vacancies from disordered regions formed by fast neutrons; the second annealing stage obeyed a chemical kinetics equation of the second order with an activation energy of 1.8 eV.

• Research Organization: Institute of Electronics, Academy of Sciences of the Uzbek SSR, Tashkent
• OSTI ID: 5230170
• Journal Information: Sov. Phys. - Semicond. (Engl. Transl.); (United States), Journal Name: Sov. Phys. - Semicond. (Engl. Transl.); (United States) Vol. 11:8; ISSN SPSEA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ANNEALING
ANNIHILATION
BARYONS
BASIC INTERACTIONS
COLLISIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
FAST NEUTRONS
FERMIONS
GERMANIUM
HADRONS
HEAT TREATMENTS
INTERACTIONS
METALS
NEUTRONS
NUCLEONS
PHYSICAL RADIATION EFFECTS
POSITRON COLLISIONS
RADIATION EFFECTS