FAIR-DDX: a code for production of double differential cross section library

Recently double differential (energy and angle) cross sections (DDX) have been measured intensively in Osaka and Tohoku Universities. These results give valuable information on the cross sections in high energy region important for fusion neutronics, paticularly on the inelastic scattering. Hence useful feed-back is expected on the evaluation work for JENDL-3 by comparing the evaluation data in JENDL-2 with these experimental DDX data. For this purpose. FAIR-DDX code has been developed to produce the double differential cross sections from JENDL-2 library in Working Group on Group Constants for Fusion and Shielding of Japanese Nuclear Data Committee. This report is a manual of FAIR-DDX, which describes on outline of the code and explain how to use it. (author)