Author:
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ISBN:
Category :
Languages : en
Pages : 19
Book Description
Nuclear Resonance Fluorescence States in 239Pu
Nuclear Resonance Fluorescence Excitations Near 2 MeV in 235U and 239Pu
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
A search for nuclear resonance fluorescence excitations in 235U and 239Pu 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 9 photopeaks in 235U and 12 photopeaks in 239Pu in this energy range. These resonances provide unique signatures that allow the materials to be non-intrusively 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.
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
A search for nuclear resonance fluorescence excitations in 235U and 239Pu 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 9 photopeaks in 235U and 12 photopeaks in 239Pu in this energy range. These resonances provide unique signatures that allow the materials to be non-intrusively 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.
Examining 239Pu and 240Pu Nuclear Resonance Fluorescence Measurements on Spent Fuel for Nuclear Safeguards
Final Report for Nuclear Resonance Fluorescence Measurements of 239Pu Above 2.5 MeV.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
Nuclear Resonance Fluorescence measurements were performed at the free electron laser facility at UC Santa Barbara using a bremsstrahlung beam. Three endpoint energies were chosen for the bremsstrahlung to cover as much area above 2.5 MeV as possible. We were able to set an upper limit of NRF state strengths between 2.5 and 3.8 MeV at roughly 38(5) eV barns at the 4-sigma level and 9(2) eV barns at the 1-sigma level. Published results on states near 2.4 MeV indicate strengths about 10(2) eV barns. Details of the results are presented in this report.
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
Nuclear Resonance Fluorescence measurements were performed at the free electron laser facility at UC Santa Barbara using a bremsstrahlung beam. Three endpoint energies were chosen for the bremsstrahlung to cover as much area above 2.5 MeV as possible. We were able to set an upper limit of NRF state strengths between 2.5 and 3.8 MeV at roughly 38(5) eV barns at the 4-sigma level and 9(2) eV barns at the 1-sigma level. Published results on states near 2.4 MeV indicate strengths about 10(2) eV barns. Details of the results are presented in this report.
Nuclear Resonance Fluorescence in 240Pu
Measurements of Nuclear Resonance Fluorescence on the 1.27 Mev Level of Sn−p116 −s
Author: John M. Gonser
Publisher:
ISBN:
Category : Fluorescence
Languages : en
Pages : 82
Book Description
Publisher:
ISBN:
Category : Fluorescence
Languages : en
Pages : 82
Book Description
Applications of Photonuclear Physics for International Safeguards and Security
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
Studies of nuclear resonance fluorescence based applications are presented. Important for these applications are data for isotopes such as 239Pu. Nuclear resonance fluorescence measurements of 239Pu 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.
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
Studies of nuclear resonance fluorescence based applications are presented. Important for these applications are data for isotopes such as 239Pu. Nuclear resonance fluorescence measurements of 239Pu 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.
Nuclear Resonance Fluorescence in 31P and 55Mn
Nuclear Resonance Fluorescence in 206, 207, 208 Pb and 209 Bi
Author: Daniel Frederick Coope
Publisher:
ISBN:
Category : Nuclear magnetic resonance
Languages : en
Pages : 86
Book Description
Publisher:
ISBN:
Category : Nuclear magnetic resonance
Languages : en
Pages : 86
Book Description