Applications of Photonuclear Physics for International Safeguards and Security APPLICATIONS OF PHOTONUCLEAR PHYSICS FOR INTERNATIONAL SAFEGUARDS AND SECURITY

Studies of nuclear resonance fluorescence based applications are presented. Important for these applications are data for isotopes such as 239 Pu. Nuclear resonance fluorescence measurements of 239 Pu were performed at the free electron laser facility at UC Santa Barbara using photons from a bremsstrahlung beam with an endpoint energies between 4.0 MeV and 5.5 MeV. Though no discrete states with significant confidence level were measured, we have excluded the region above 27(3) eV-barns, or 4-sigma, where we would expect only a small chance of false positives. Details of the measurements and the results are presented here