A Reflection Upon the Applicability of Electron Beam Induced Current (EBIC) as a Sensitive Microanalytical Technique (ppb range) for Silicon Materials Research

This paper discusses the application of electron-beam-induced current (EBIC) technique as a tool which is able to provide at least qualitative microanalytical information not available from other techniques. Three examples are given which demonstrate a sensitivity in the parts per billion (ppb) range: temperature dependence of dislocation contrast as a fingerprint of level of metal (Cu) contamination, iron determination down to 1013 atoms per cm3, and visualization of phosphorous striations in silicon grown by float-zone (FZ) method (FZ-grown Si). Microanalytical information by EBIC is rather indirect and, usually, identification of the impurity species is not possible. Conclusions about impurity content require supplementary information and a large degree of expertise and may not be unambiguous. Nevertheless, despite these weaknesses, EBIC is considered to be a valuable tool to increase our understanding of impurity behavior, because real trace analysis methods, able to meet sensitivity and spatial requirements, are rare and utilization of indirect methods is necessary, therefore

Influence of dislocation loops on the near infrared light emission from silicon diodes

The infrared light emission of forward-biased silicon diodes is studied. Through ion implantation and anneal, dislocation loops were created near the diode junction. These loops suppress the light emission at the band-to-band peak around 1.1 μm. The so-called D1 line at 1.5 μm is strongly enhanced by these dislocation loops. We report a full study of photoluminescence and electroluminescence of these diodes. The results lead to new insights for the manufacturing approach of practical infrared light sources in integrated circuit

Определение оптимального спектрального состава пучка нейтронов при проведении НЗТ

В данной работе рассматривалось определение оптимального спектрального состава пучка нейтронов при проведении НЗТ. Для проведения исследования были созданы модели частей тела, а также задан источник нейтронов при помощи программного обеспечения MCU-PTR. Основной целью данной работы является достижение оптимального спектрального состава в пучке нейтронов для проведения НЗТ.In current work was considered the determination of the optimal spectral composition of a neutron beam during NCT. For the study, models of body parts were created, and a neutron source was set using the MCU-PTR software. The main goal of this work is to achieve the optimal spectral composition in a neutron beam for conducting NC

Современное состояние и перспективы развития ООПТ Томской области

В работе дана характеристика сети особо охраняемых природных территорий Томской области, ее роли в поддержании эколого-хозяйственного баланса области. Определены этапы формирования сети ООПТ. Дан анализ географического разнообразия сети ООПТ и представленности ее в административных районах области. Определена роль сети ООПТ в сохранении редких и исчезающих видов растений и животных. Разработана и реализована методика комплексной оценки эффективности сети ООПТ. Предложены пути ее развития и оптимизации.In work the characteristic of the network of specially protected natural territories of the Tomsk region, its role in maintaining ecological and economic balance of the region. The stages of forming a network of protected areas. The analysis of the geographic diversity of the PA network and its representation in the administrative districts of the region. Defined the role of the network of protected areas in the conservation of rare and endangered species of plants and animals. Developed and implemented a methodology of comprehensive evaluation of the effectiveness of the PA network. The proposed ways of its development and optimization

Технологические решения для строительства эксплуатационной наклонно-направленной скважины глубиной 3673 метров на Арчинском нефтегазоконденсатном месторождении (Томская область)

Цель работы – технологические решения для строительства наклонно-направленной скважины глубиной 3673 метров на Арчинском нефтегазоконденсатном месторождении. В процессе исследования в специальной части теоретически рассмотрели возможность качественного вскрытия продуктивных пластов на депрессии. В результате исследования Разработаны мероприятия по организации строительства, охране труда и окружающей среды. Степень внедрения: на аналитическом уровне.Purpose – technological solutions for the construction of directional well with a depth of 3673 meters Archinskoye oil and gas condensate field. In the process of research in special parts theoretically considered the possibility of qualitative opening of productive layers on depression. The study Developed measures for the organization of construction, occupational safety and the environment. Level of implementation: at the analytical level