Defect-impurity interactions in irradiated germanium. [/sup 60/Co. gamma. rays, 1. 5 to 2 MeV electrons, thermal neutrons]

Journal Article · Mon Dec 01 04:00:00 EST 1975 · IEEE Trans. Nucl. Sci.; (United States)

DOI:https://doi.org/10.1109/TNS.1975.4328121· OSTI ID:7326541

Cleland, J W; James, F J; Westbrook, R D

The purpose of these experiments was to formulate a better model for the structures of lattice defects and defect-impurity complexes in irradiated n-type Ge. Single crystals were grown by the Czochralski process from P, As, or Sb-doped melts, less than or equal to 10/sup 15/ to greater than or equal to 10/sup 17/ oxygen cm/sup -3/ was added to the furnace chamber after approximately /sup 1///sub 3/ of the crystal had been solidified. Hall coefficient and resistivity measurements (at 77/sup 0/K) were used to determine the initial donor concentration due to the dopant and clustered oxygen, and infrared absorption measurements (at 11.7 ..mu..) were used to determine the dissociated oxygen concentration. Certain impurity and defect-impurity interactions were then investigated that occurred as a consequence of selected annealing, quenching, Li diffusion, and irradiation experiments at approximately 300/sup 0/K with /sup 60/Co photons, 1.5 to 2.0 MeV electrons, or thermal energy neutrons. Particular attention was given to determining the electrical role of the irradiation produced interstitial and vacancy, and to look for any evidence from electrical and optical measurements of vacancy-oxygen, lithium-oxygen, and lithium-vacancy interactions. A tentative model was developed for the lattice defect and defect-impurity structures; however, it was evident that any interpretation of defect-impurity interactions as a consequence of irradiation or annealing was subject to considerable error if the concentration and electrical role of certain impurities was not determined.

• Research Organization: Oak Ridge National Lab., TN
• OSTI ID: 7326541
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Journal Name: IEEE Trans. Nucl. Sci.; (United States) Vol. NS-22:6; ISSN IETNA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALKALI METALS
ALLOYS
ANNEALING
ANTIMONY ADDITIONS
ANTIMONY ALLOYS
ARSENIC ADDITIONS
ARSENIC ALLOYS
BEAMS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFUSION
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELEMENTS
GAMMA RADIATION
GERMANIUM
HALL EFFECT
HEAT TREATMENTS
IONIZING RADIATIONS
LEPTON BEAMS
LITHIUM
METALS
N-TYPE CONDUCTORS
NEUTRON BEAMS
NUCLEON BEAMS
OXYGEN ADDITIONS
PARTICLE BEAMS
PHOSPHORUS ADDITIONS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
PNICTIDES
QUENCHING
RADIATION EFFECTS
RADIATIONS
SEMICONDUCTOR MATERIALS