Astrophysics, Symmetries, and Applied Physics at Spallation Neutron Sources : Proceedings of the Workshop on ASAP 2002.
Title:
Astrophysics, Symmetries, and Applied Physics at Spallation Neutron Sources : Proceedings of the Workshop on ASAP 2002.
Author:
Koehler, Paul E.
ISBN:
9789812776242
Personal Author:
Physical Description:
1 online resource (264 pages)
Contents:
Contents -- Preface -- Schedule for the Workshop on ASAP -- Participant List -- Neutron Capture Nucleosynthesis: Astrophysical Processes and Laboratory Approaches -- 1 Introduction -- 2 The Observed Abundances -- 3 Neutron Capture Scenarios -- 4 The Case of the s Process -- 5 s Process Models -- 6 s-Process Branchings -- 7 Neutron Data for Astrophysics: Status and Needs -- 8 Summary -- References -- The Detector for Advanced Neutron Capture Experiments at LANSCE -- 1 Introduction -- 2 Neutron Source -- 3 Preliminary Data with C6D6 Scintillators -- 4 DANCE Design -- 5 Summary and Future Plans -- References -- Astrophysics Program at the CERN n_TOF Facility -- 1 Introduction -- 2 Priority measurements for nuclear astrophysics -- 3 Conclusion and perspectives -- Acknowledgments -- References -- Recent Astrophysics Results from ORELA and Possible Future Experiments at ORELA and SNS -- 1 Introduction -- 2 Recent ORELA Results and the Need for New Measurements -- 3 The Need for the SNS -- Acknowledgements -- References -- Sensitivity of Isotope Yields to Reaction Rates in the Alpha Rich Freezeout -- 1 Introduction -- 2 The calculations -- 3 Web-based data display -- 4 Examples -- 5 Conclusion -- Acknowledgements -- References -- Neutron Reactions of Light Nuclei from Astrophysics & Nuclear Physics Interest -- 1 Introduction -- 2 Experimental method -- 3 Results and discussions -- 4 Summary -- References -- Measurement of the n+p->d+y Cross Section for Big Bang Nucleosynthesis with the Spallation Neutron Source at the Los Alamos Neutron Science Center -- 1 Introduction -- 2 The Experimental Setup -- 3 Status and expected Signal -- References -- Phonon Properties of Materials from Neutron Resonance Doppler Broadening Measurements -- 1 Introduction -- 2 Theory and experimental requirements.
3 Measurements on Tungsten and Tantalum metals -- 4 Plutonium- gallium alloy -- 5 Doppler Resonance Spectroscopy at the SNS -- Acknowledgements -- References -- Applied Nuclear Physics at Spallation Neutron Sources -- 1 Introduction -- 2 Applied Nuclear Physics -- 3 Nuclear Power Applications -- 4 Defense Applications -- 5 Other Applications -- 6 Reaction Model Applications -- 7 Conclusions -- Acknowledgements -- References -- Applied Physics Measurements at the CERN n_TOF(1) Facility -- 1 Introduction and motivations for the measurements program -- 2 The n_TOF-ADS EC project -- 3 Program of neutron cross section measurements at n_TOF -- References -- Activities of the DOE Nuclear Criticality Safety Program (NCSP) at the Oak Ridge Electron Linear Accelerator (ORELA) -- 1 Introduction -- 2 The Need for Nuclear Data Measurements -- 3 Measurement Activities at ORELA -- 4 Summary -- 5 Acknowledgements -- References -- Parameters for Nuclear Reaction Calculations - Needs for Improvements -- 1 Introduction -- 2 Contents of RIPL-2 -- 3 Testing -- 4 Code Interfaces -- 5 Conclusions -- 6 Participants -- References -- Aluminum Data Measurements and Evaluation for Criticality Safety Applications -- 1 Data Measurements -- 2 Data Evaluation -- 3 Distribution of the Resonance Parameters -- 4 Spin Channel Issue -- 5 Data Testing of the Aluminum Evaluation -- 6 Conclusions -- Reference -- Nuclear Physics Investigations at the Time-of-Flight Spectrometer GNEIS with Spallation Neutron Source -- 1 Facility description -- 2 Study of the (nyf)-reaction in Neutron Resonances of 235U and 239Pu.
3 Measurements of the capture cross-section of 238U in energy range En<100 keV and y-ray spectra from the capture of resonance neutrons: study of the nature of the 721.6 eV resonance -- 4 Measurement of the neutron total cross-sections of Pb-isotopes: estimate of the electric polarizability of the neutron -- 5 Measurement of the forward-backward asymmetry in slow neutron fission -- 6 Neutron induced fission cross-sections measurement of actinides and non-fissile nuclei relative to 235U in the energy range 1 - 200 MeV -- 7 Acknowledgements -- References -- Measurements of Neutron Capture Cross Sections of Long-lived Fission Products -- 1 Introduction -- 2 Development of neutron-capture cross section measurement methods -- 3 Discussion -- 4 Acknowledgements -- References -- Temperature Measurements in Dynamically-loaded Systems Using Neutron Resonance Spectroscopy (NRS) at LANSCE -- 1 Introduction -- 2 Neutron Resonance Spectroscopy -- 3 Neutron Beam and Experimental Setup -- 4 Measurement Time Scale -- 5 Contributions to the Final Line shape -- 6 Shocked Metal Experiment -- Acknowledgements -- References -- Radioactive Target Production at RIA -- 1 Introduction -- 2 Brief Overview of the RIA facility -- 3 Isotopes of interest for the s process -- 4 Isotopes of interest for the p process -- 5 Nuclei with shorter half-lives -- 6 Conclusions -- 7 Acknowledgements -- References -- Parity Violation in Epithermal Neutron Resonances -- 1 Introduction -- 2 Experimental Method -- 3 Analysis -- 4 Results -- 5 Conclusion -- Acknowlegments -- References -- New Experimental Capabilities for Parity Non-conservation and the Time Reversal Invariance Violation in Neutron Transmission -- 1. Introduction.
2. An experimental setup to search for violation of timereversal invariance in neutron transmission -- 3. About pulsed spallation neutron sources -- 4. Neutron beam polarizer and analyzer -- 5. Polarized nuclear targets for a triple-correlation experiment -- 6. Summary -- References -- T-Violating Three-fold Correlation in Neutron Transmission -- References -- Violation of Fundamental Symmetries in Resonance Neutron Induced Fission -- 1 Introduction -- 2 Elements of formalism -- 3 Discussion -- Acknowledgements -- References -- Physics of the Fission Process and Parity Violation in Neutron Induced Reactions -- 1 Introduction -- 2 Angular Correlations in Fission -- 3 Why we need the SNS to study asymmetries in fission? -- References -- Possibilities for Studies of Parity Violation at the SNS Using the Capture Gamma Reaction -- 1 Introduction -- 2 Parity Violation in Neutron Capture -- 3 Experimental Considerations -- 4 Summary -- References -- Time Reversal Tests with Epithermal Neutrons -- 1 Introduction -- 2 Transmission Tests -- 3 Statistics of Null Bounds -- Acknowledgment -- Appendix -- References -- An Experiment to Search for Parity-conserving Time Reversal Invariance Using Epithermal Neutrons from the Spallation Neutron Source -- 1 Introduction -- 2 Deformation Effect -- 3 Time-Reversal Violation for s-d Mixing -- 4 Experimental Setup -- 5 Summary -- References -- Neutronic Characteristics of the Spallation Neutron Source -- 1 Introduction -- 2 SNS Target System -- 3 Monte Carlo Modeling and Results -- 4 Summary -- 5 Acknowledgements -- References -- Workshop Summary: Opportunities in Astrophysics Symmetries and Applied Physics at Spallation Neutron Sources -- Letter of Intent to the Spallation Neutron Source -- Author Index.
Abstract:
The spallation neutron source (SNS) being built at the Oak Ridge National Laboratory (ORNL) will be by far the highest flux pulsed source of epithermal neutrons in the world when it comes on line in 2006. Although the main thrust of the science program at the SNS will be materials science, the facility could provide outstanding opportunities for research in nuclear astrophysics, fundamental symmetries, and applied nuclear physics. To review the current status of these fields and to begin to assemble the scientific case and the community of researchers for future experiments at the SNS, a workshop on "Astrophysics, Symmetries, and Applied Physics" was held in March 2002 at the ORNL. Over 60 scientists, representing 11 US and 4 foreign universities as well as many national laboratories around the world, participated in the workshop. The proceedings describe the current state of research in those fields and the future opportunities at the SNS. Contents: The Detector for Advanced Neutron Capture Experiments at LANSCE (J L Ullmann et al.); Recent Astrophysics Results from ORELA and Possible Future Experiments at ORELA and SNS (P E Koehler); Applied Nuclear Physics at Spallation Neutron Sources (P Oblozinzky); Aluminum Data Measurements and Evaluation for Criticality Safety Applications (L C Leal et al.); Measurement of Neutron Capture Cross Sections of Long-lived Fission Products (H Harada et al.); Radioactive Target Production at RIA (J C Blackmon); Parity Violation in Epithermal Neutron Resonances (G E Mitchell et al.); Violation of Fundamental Symmetries in Resonance Neutron Induced Fission (A Barabanov et al.); Time Reversal Tests with Epithermal Neutrons (C R Gould); Neutronic Characteristics of the Spallation Neutron Source (P D Ferguson et al.); and other papers. Readership: Graduate students, researchers and engineers in nuclear astrophysics,
nuclear physics, nuclear engineering, applied physics and nuclear medicine.
Local Note:
Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2017. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.
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