A SINGLE-CRYSTAL ADAPTOR FOR THE NORELCO HIGH-ANGLE DIFFRACTOMETER
Abstract
The adapter is based on the principle of completely bathing a small crystal in a slightly divergent collimated x-ray beam, and slowly rocking the crystal through the Bragg reflection angle while keeping the GM counter stationary at the proper 2 theta angle. The normal specimen holder is replaced by a long shaft which closely fits the bronze sleeve of the diffractometer and ends in a screw on which a Supper goniometer head can be fitted. A graduated circle is attatched to the other end of the shaft which is connected to a synchronous motor. The whole shaft can be translated along its length to bring the crystal into the x-ray beam. A Bodine motor is used to rotate the crystal at a constant angular velocity of 1/8 deg theta/min. A backstop is mounted on a sleeve which fits over the collimator shaft, and permits the counter ro record spectra with angles as low as 3 deg 2 theta.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1953
- Accession Number
- AD0019940
Entities
People
- H. J. Grenville-wells
- S. C. Abrahams
Organizations
- Massachusetts Institute of Technology