Investigation of the behaviours of different glasses against radiation, evaluation of the usage for dosimetric purposes and a new correlation , YOK PhD Thesis No: 126657

Baydoğan N.

ITU, İstanbul, 2001

  • Publication Type: Book / Other Book
  • Publication Date: 2001
  • Publisher: ITU
  • City: İstanbul
  • Istanbul Technical University Affiliated: Yes


INVESTIGATION OF THE BEHAVIOURS OF DIFFERENT GLASSES AGAINST RADIATION, EVALUATION OF THE USAGE FOR DOSIMETRIC PURPOSES AND A NEW CORRELATION SUMMARY Glass is an engineering material commonly used for different purposes. Today, soda- lime-silicate glass is the most widely used one among different types of glasses. In addition, lead-alkali-silicate, borosilicate, barium, and boron containing special optical glasses have also relatively wide use. Although, the behaviours of different types of glasses against radiation are generally similar, this is significantly affected by major and minor elements present in the glass structure as well as the type and the energy of the radiation source. In this study, soda-lime-silica, lead-alkali silica, borosilicate and barium glasses, which were supplied from Topkapi Sisecam Co. and whose chemical compositions were analysed with X-Ray Fluorescence Technique (XRF), were used in order to investigate the behaviours of them against different types of radiation. To do this, gama rays, beta rays, neutrons and mixed radiation were selected to use because of their important penetration characteristics into the glasses. Co-60 radioisotope and Sr-90 radioisotope were used as the gama and the beta source, respectively. Tangential Beam Tube of ITU TRIGA Mark-II Training and Research Reactor was used as the neutron source and Central Thimble of the Reactor was used as the mixed radiation source. It was determined from the experimental studies the irradiated glasses changed their colours and this colour change was connected with the absorbed dose. This behaviour was investigated spectrophotometrically and evaluated for different glasses comparatively. Based on experimental data, further evaluations were performed about the usage of the glasses for dosimetric purposes and established a new mathematical correlation expressing the relation between spectrophotometric data, which states the colour change and the absorbed dose