Criteria for the Consistent Counting of Delta Rays on Heavy Nuclear Tracks in Emulsion Plates Available to Purchase

This paper is an attempt to improve greatly the consistency of delta-ray counting along tracks of heavy nuclei in emulsions. The problem is complicated and, unless satisfactory criteria are properly followed, variable results may be expected both from a given scanner and from different scanners. A set of criteria are given. Considerable information regarding their use is included. This work is adapted to nuclei with Z's of ten or greater.