PHYSICAL PROPERTIES OF INSULATORS MOLECULAR CRYSTALS AND MAGNETIC MATERIALS
Abstract
Research is being carried out on the determination of the physical properties of alkali halides, molecular crystals and magnetic materials. The research on alkali halides involves the creation of point imperfections by weak ionizing radiations. A study of the expansion and F center concentration in alkali halides induced by x-ray irradiation of relatively weak intensities was made. The ionization of excited F centers by electric fields was detected by measuring the change in the F - center concentration when additively colored crystals were irradiated in the F band at liquid N temperatures and an electric field was applied simultaneously. These experiments were designed to give information as to whether the ionization could be considered a Zener type tunneling or an impact ionization process. Work on molecular crystals is presented and results on the photoconductivity of I single crystals are reported. The design of a Foner type magnetometer and a torsion anisotropy apparatus is described. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1961
- Accession Number
- AD0268666
Entities
People
- Max E. Caspari
Organizations
- University of Pennsylvania