High resolution diffraction imaging of crystals grown in microgravity and closely related terrestrial crystals
Abstract
Irregularities found in three crystals grown in space, in four crystals grown entirely on the ground were examined and compared. Irregularities were observed in mercuric iodide, lead tin telluride, triglycine sulfate, and gallium arsenide by high resolution synchrotron x radiation diffraction imaging. Radiation detectors made from mercuric iodide crystals grown in microgravity were reported to perform far better than conventional detectors grown from the same material under full gravity. Effort is now underway to reproduce these 'space' crystals, optimize their properties, and extend comparable superiority to other types of materials.
- Publication:
-
National Aeronautics and Space Administration Report
- Pub Date:
- August 1991
- Bibcode:
- 1991nasa.reptU....S
- Keywords:
-
- Crystal Defects;
- Crystal Growth;
- Gallium Arsenides;
- Iodides;
- Lead Tellurides;
- Mercury Compounds;
- Reduced Gravity;
- Sulfates;
- Tin Tellurides;
- Gravitation;
- Gravitational Effects;
- High Resolution;
- Imaging Techniques;
- Irregularities;
- Radiation Detectors;
- Synchrotron Radiation;
- X Ray Diffraction;
- Solid-State Physics