Subjects of research: Silicon single crystal with large diameter and thickness (D > 30 mm, d > 3mm), Si(Li) p-n and p-i-n structures with large sensitive volume.
Purpose of work: Investigation of new physical and technological bases for development of Si(Li) detectors of nuclear radiation on silicon single crystals with a diameter up to 100 - 110 mm and thickness W > 5 mm.
Methods of research: One- and four- probe measurements, electro-physical (current-volt, capacity-volt and noise-volt characteristics) and radiometric measurements, phase-frequency measurements.
The results obtained and their novelty: New specific features of the lithium diffusion process in p-Si with large diameter, related to formation of Li-0 complexes, have been revealed. New physical techniques in lithium drift technology on silicon single crystal of large volume are found. Previously unexplored physical and technological aspects in development of universal spectrometer of telescope type and low background installation based on Si(Li) p-i-n structure with large sensitive area, are presented. Methods based on external sources (ultrasound, pulsed electric field) are developed, which extend the basic knowledge in semiconductor physics.
Practical value: the unique detectors of nuclear radiation created on silicon wafers with diameter up to 110 mm do not have analogues in the world. They open new perspectives in the design of original experiments in nuclear physics, as well as new applications in various fields of science and technology, such as geology, metallurgy, medicine, environment protection, etc.
Degree of embed and economic effect: semiconductor detectors that have been developed are employed in nuclear physics experiments conducted at Nuclear Research Institute of Moscow State University, agreement No.01/04, 01/05 Institute of Nuclear Physics of Uzbek Academy of Sciences, Scientific Production Association of Russia "Taifun", Almalik Metallurgical Enterprize, Uzgidromet, agreement No. 01/07 09 UzKTGM.
Field of application: new scientific knowledge and advanced technology for the creation of silicon-lithium detectors of nuclear radiation with large sensitive volume, that have been obtained, can be effectively used for solving various fundamental and applied problems in nuclear physics, medicine, geology, archeology, environmental research, etc.
