Nuclear resonance fluorescence excitations near 2 MeV in {sup 235}U and {sup 239}Pu
- Passport Systems Incorporated, Acton, Massachusetts 01720 (United States)
- Pacific Northwest National Laboratory, Richland, Washington 99352 (United States)
- Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
A search for nuclear resonance fluorescence excitations in {sup 235}U and {sup 239}Pu within the energy range of 1.0- to 2.5-MeV was performed using a 4-MeV continuous bremsstrahlung source at the High Voltage Research Laboratory at the Massachusetts Institute of Technology. Measurements utilizing high purity Ge detectors at backward angles identified nine photopeaks in {sup 235}U and 12 photopeaks in {sup 239}Pu in this energy range. These resonances provide unique signatures that allow the materials to be nonintrusively detected in a variety of environments including fuel cells, waste drums, vehicles, and containers. The presence and properties of these states may prove useful in understanding the mechanisms for mixing low-lying collective dipole excitations with other states at low excitations in heavy nuclei.
- OSTI ID:
- 21192273
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 78, Issue 4; Other Information: DOI: 10.1103/PhysRevC.78.041601; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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