Nuclear Resonance Fluorescence States in $^{239}$Pu
ORAL
Abstract
Nuclear Resonance Fluorescence (NRF) has been used to probe collective excitations in many deformed rare-earth and actinide nuclei. Two collective modes have been established below 3 MeV, magnetic dipole excitations and Octupole-Quadrupole excitations. We will present measurements of newly discovered NRF states in $^{239}$Pu. The measurements were performed at the HVRL at MIT using a bremsstrahlung source with an endpoint energy up to 3 MeV. Plans for future measurements of NRF states in $^{239}$Pu at higher energies will be presented. We will also briefly discuss current research at LLNL to use NRF as a method to isotopically map containers.
*Part of this work was done in collaboration with Passport Systems Inc. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
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