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Showing 1 to 13 of 13 for “"nuclear resonance fluorescence"”.
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Nuclear resonance fluorescence in Si²⁸
… γ)Si²⁸ was investigated using a technique of nuclear resonance fluorescence. A silicon absorber was placed in a collimated beam of gamma rays from the reaction. The direction of collimation with reference to the direction of the bombarding protons governs the exact energy of the ground state …
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Nuclear Resonance Fluorescence in Lead-206,207,208 and Bismuth-209
Made available in DSpace on 2015-05-13T15:21:53Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7524286.PDF: 2412351 bytes, checksum: 0cda674b42367a2b8a9c064cb63aea22 (MD5) Previous issue date: 1975
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Nuclear Resonance Fluorescence in 206, 207, 208Pb and 209Bi
… general value in furthering our understanding of nuclear structure. Nuclear resonant photon scattering between 4 MeV and the neutron separation energy for targets of 206, 207, 208Pb and 209Bi was observed w1th a large Ge(Li) detector. Energies and ground state decay widths were measured for …
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Nuclear resonance fluorescence studies of sodium, aluminum, and phosphorous
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-16T15:56:25Z No. of bitstreams: 1 1981_vodhanel.pdf: 6684934 bytes, checksum: 3ba7105d9baa381270b60576f12f2f15 (MD5)
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Monochromator studies of nuclear resonance fluorescence in carbon, silicon, and magnesium
… the monochromator a better tool for studying nuclear levels and the investigation of the properties of selected levels. There are three aspects of the monochromator performance which were improved or studied during the course of the experiment. The first consisted of the design of a very fast …
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Development of an isotope-sensitive warhead verification technique using nuclear resonance fluorescence
… three decades after the end of the Cold War, nuclear arms control remains a pressing global issue. Despite obligations under the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) to make 'good-faith efforts' to disarm their nuclear arsenals, the United States and Russia still maintain …
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Monte Carlo simulations of a physical cryptographic warhead verification protocol using nuclear resonance fluorescence
Future multilateral nuclear arms reduction efforts will require technologies for the verification of treaty compliance. In particular, warheads slated for dismantlement will need to be verified for authenticity without revealing any sensitive weapons design information to international inspectors. …
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Increasing proliferation resistance of sodium fast reactor fuel cycle through use of a nuclear resonance fluorescence detector
… using a novel detection system that utilizes the nuclear resonance fluorescence (NRF) phenomenon to determine the isotopic composition of materials flowing through the plant. In an aqueous reprocessing facility, the waste stream was identified as a weak point for proliferation resistance. By …
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Resonant elastic photon scattering from the nuclei 88Sr, 89Y, and 90Zr
Nuclear resonant elastic photon scattering in the N=50 nuclei B8Sr, 89y , 90 and Zr was measured between 5 and 10 MeV excitation energy. Average elastic cross sections for natural targets were measured using tagged photons of resolution 60 to 150 keV and a NaI scintillation detector. Total cross …
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Monte Carlo Method for Calorimetric NRF Cargo Screening
A number of fields in nuclear security require isotopic analysis and identification. Nuclear resonance fluorescence(NRF) has provided a non-intrusive isotope-sensitive measurement technique to detect special nuclear material in cargo [8], and has been proposed to be used as a verification technique …
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Data processing and inference methods for zero knowledge nuclear disarmament
It is hoped that future nuclear arms control treaties will call for the dismantlement of stored nuclear warheads. To make the authenticated decommissioning of nuclear weapons agreeable, methods must be developed to validate the structure and composition of nuclear warheads without it being possible …
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Photon scattering from 40Ca and 39K up to 14 MeV
… resonant absorption experiments were done on it. Nuclear resonance fluorescence was measured up to 9.5 MeV in both 39K and 40Ca using a Ge(Li) detector. Elastic scattering was seen from twelve levels in 40Ca and from seventeen levels in 39K. Inelastic scattering was seen from one level in each …
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Estimating warhead design properties from multiple resonances in physical cryptographic warhead verification
Further progress towards complete nuclear disarmament hinges upon the development of technologies that can reliably verify the authenticity of nuclear weapons without revealing classified information about their design. One recently developed approach makes use of isotope-specific nuclear resonance …