High Energy Neutron Time of Flight Measurements of Carbon and Beryllium Samples at the RPI LINAC

New high energy (0.5-20 MeV) beryllium total cross sections have been measured at the Gaerttner Linac Laboratory located at Rensselaer Polytechnic Institute. The transmission measurement combines fast detector response and electronics, a narrow neutron pulse width and 100 meter flight path. The detector system was validated using the well known cross sections of carbon. An innovative background determination technique was developed and applied. Cross sections derived from both the carbon and beryllium data are compared to ENDF/B-VII.0. This effort validates the newly developed 100 meter time of flight system and data analysis methods and provides useful information to improve the current data for beryllium.