New Capabilities of the RPI γ-Multiplicity Detector to Measure γ-Production

Accurate modeling of γ-production in neutron capture reactions is critical for many applications including on-proliferation, safeguards and nuclear reactors. To improve this work, the Rensselaer Polytechnic Institute (RPI) 16-segment γ-multiplicity NaI(Tl) detector at Gaerttner Linear Accelerator (LINAC) Center has been upgraded by implementing a digital data acquisition system. The new digitized system records γ-energy deposition distribution each individual detector, values as function time-of-flight (TOF). With capabilities, high precision (and fission) yield measurements can be made, accuracy simulation tools used to predict γ-cascades tested. validate updated system, an experiment was performed using natural Ta sample measure 181 180m resonance detecting prompt γ-rays emitted from interactions both energy measured event. results confirm earlier agree with theoretical low region 1 20 eV. A 238 U(n, γ) measurement also generate γ-spectra. For where total close binding energy, γ-spectra were energies observed γ-multiplicities. are comparable shape recent done Detector Advanced Neutron Capture Experiments (DANCE) array Los Alamos Science (LANSCE); however, differences need compared Monte-Carlo n-particle simulations.