OVERVIEW FACILITY DETECTORS DAQ EXPERIMENTS PUBLICATIONS COLLABORATIONS PEOPLE LINKS

Scheduled Experiments l Special Events l Contacts TUNL Activity An interdisciplinary program has been developed at TUNL, devoted to a fundamental study of the interaction of neutrons and gamma rays with matter. Key instruments for this research include the ion sources and associated accelerator for generating neutron beam at TUNL and the High Intensity Gamma Ray Source (HIγS) at DFELL, which produce the world's most intense and highly polarized monoenergetic beams in the low-energy regime. These sources, in combination with cutting-edge detector systems, offer new insights into nuclear systems. MAJOR GOALS Greater accuracy in low energy cross sections and corresponding reaction rates for neutron and gamma-induced reactions Precision measurements of the (n,2n) cross section on Actinides Cross-section measurements of isomer states produced in (n,n') and (n,2n) reactions Nuclear structure study for reactions with low momentum transfer Nuclear resonance fluorescence studies at HIGS Nuclear astrophysics experiments at HIGS Applied nuclear physics with low-energy neutrons and gamma rays Off- site Activity A second program has been established to measure level densities, cross sections, and strength functions. Initial activities focused on measurement of radiative strength functions at low photon energies and level densities in the energy region below the nucleon separation energy. Present activities focus on measurement of neutron capture cross sections using the DANCE array at Lujan Center, Los Alamos National Laboratory and measurement of neutron-induced reactions (from 1 to 250 MeV) using the GEANIE array: at WNR, Los Alamos National Laboratory. MAJOR GOALS Determination of level densities and radiative strength functions for energy ranges previously inaccessible Partial cross sections for (n,xnypz&alpha&gamma) reactions, with emphasis on preequilibrium effects Measurement of neutron capture cross sections, with emphasis on small samples including radioactive targets NOTICE : The present research activity is partially supported by the Stewardship Science Academic Alliances Program through DOE Research grant #DE-PS52-05NA25930.