Positron lifetime in neutron-irradiated germanium

Journal Article · Fri Feb 01 04:00:00 EST 1980 · Sov. Phys. - Semicond. (Engl. Transl.); (United States)

OSTI ID:5408413

Arifov, P U; Arutyunov, N Y

A model is proposed for calculating the average positron lifetime (before annihilation) in the case when positrons are captured by traps of two types. The average positron lifetime calculated from the experimentally determined angular correlation of the annihilation ..gamma.. rays increases during stage I of isochronous annealing of neutron-irradiated germanium and decreases during stage II to the value before irradiation. The experimental and calculated dependences of the average positron lifetime on the annealing temperature are in qualitative agreement. The observed narrowing of the angular correlation curves and increase in the positron lifetime in neutron-irradiated germanium are inversely proportional to one another. A combined analysis of the annihilation, electrical, and x-ray experiments shows that during annealing of neutron-irradiated germanium the process of positron annihilation is influenced by two types of positron-sensitive defects, which are formed by irradiation (mainly disordered regions) and during stage I of the annealing process (probably divacancies).

• Research Organization: Institute of Electronics, Academy of Sciences of the Uzbek SSR, Tashkent
• OSTI ID: 5408413
• Journal Information: Sov. Phys. - Semicond. (Engl. Transl.); (United States), Journal Name: Sov. Phys. - Semicond. (Engl. Transl.); (United States) Vol. 14:2; ISSN SPSEA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ANNEALING
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
COHERENT SCATTERING
DIFFRACTION
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
GERMANIUM
HEAT TREATMENTS
INTERACTIONS
LEPTONS
LIFETIME
METALS
NEUTRON DIFFRACTION
PHYSICAL RADIATION EFFECTS
POSITRONS
RADIATION EFFECTS
SCATTERING