NEEDLE ABSORB

4.15 - NEEDLE Absorption Correction

Synopsis
This provides a CAD4 specific correction suitable for cylindrical or needle crystals, where the crystal is mounted along the spindle axis. It will be useful for crystals where the needle axis is very much longer than the X-ray beam width. A GUI is presented for further information and user input. If direction cosines are present in the input reflection file, these will be echoed to the output file.

Files read
  1. name.INS (for unit cell information only)
  2. name.HKL - uncorrected reflection file
Files written
  1. NEEDLE.HKL - absorption corrected reflection file
  2. ABSORB.CIF - CIF containing relevant information