The Small Angle Scattering Cross Sections of 14.7 MeV Neutron for 238U

This work is the continuation and the development of the previous researchwork.The main detector is a position sensitive neutron detector whichconsists of a long cylindric liquid scintillation tube and two photomultipliers atboth ends of the tube.The position imformation of the incident neutron isextracted by the time difference between the signals from the two photomultipliers.Recently the measurement have been done on the Cockcroft accelerator in Tsing-hua University.Special attention has been paid to the improvement of the relia-bility and the precision in the measurements.