The Japan Atomic Energy Agency has held a new international symposium "nuclear physics and gamma-ray sources for nuclear security and nonproliferation." The purpose of this symposium is to discuss detection/measurement methods of long-lived radioisotopes and fissionable nuclides in a non-destructive manner. This technological challenge requires new methods for detecting relevant nuclides and the development of new quantum-beam sources. The development of new methods requires the help of researchers working in various scientific fields, such as nuclear physics, accelerator physics, laser physics, etc. Furthermore, any new method must be compatible with the requirements of administrators and nuclear-material inspectors. In this symposium some detection methods have been discussed. For example, one new method that has been proposed and studied is nuclear resonance fluorescence with energy-tunable, monochromatic gamma-rays generated by Compton scattering of laser photons with electrons. Many people from different fields jointed to this symposium.
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