Nuclear resonance fluorescence of 235U measured with high-resolution LaBr3 (Ce) scintillation detectors

A nuclear resonance fluorescence (NRF) experiment was performed on a 235 U target with quasi-monochromatic γ-rays at the High Intensity γ-ray Source (HIγS) facility using a 1733 keV resonant energy. A LaBr 3 (Ce) detector array consisting of eight cylindrical detectors, each with a length of 7.62 cm and a diameter of 3.81 cm, was implemented in this measurement. Moreover, a high-purity germanium (HPGe) detector array consisting of four detectors, each of which has a relative efficiency of 60%, was used as the benchmark for the measurement taken using the LaBr 3 (Ce) detector array. The integrated cross section of the NRF level, measured with LaBr 3 (Ce) detectors, showed good agreement with the available data.