The Evaluated Gamma-ray Activation File (EGAF).

The Evaluated Gamma-ray Activation File (EGAF).
Title The Evaluated Gamma-ray Activation File (EGAF). PDF eBook
Author
Publisher
Pages 5
Release 2004
Genre
ISBN

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The Evaluated Gamma-ray Activation File (EGAF), a new database of prompt and delayed neutron capture g-ray cross sections, has been prepared as part of an International Atomic Energy Agency (IAEA) Coordinated Research Project to develop a ''Database of Prompt Gamma-rays from Slow Neutron Capture for Elemental Analysis.'' Recent elemental g-ray cross-section measurements performed with the guided neutron beam at the Budapest Reactor have been combined with data from the literature to produce the EGAF database. EGAF contains thermal cross sections for (almost equal to) 35,000 prompt and delayed g-rays from 262 isotopes. New precise total thermal radiative cross sections have been derived for many isotopes from the primary and secondary gamma-ray cross sections and additional level scheme data. An IAEA TECDOC describing the EGAF evaluation and tabulating the most prominent g-rays will be published in 2004. The TECDOC will include a CD-ROM containing the EGAF database in both ENSDF and tabular formats with an interactive viewer for searching and displaying the data. The Isotopes Project, Lawrence Berkeley National Laboratory continues to maintain and update the EGAF file. These data are available on the Internet from both the IAEA and Isotopes Project websites.

Evaluation of Prompt Gamma-ray Data and Nuclear Structure of Niobium-94 with Statistical Model Calculations

Evaluation of Prompt Gamma-ray Data and Nuclear Structure of Niobium-94 with Statistical Model Calculations
Title Evaluation of Prompt Gamma-ray Data and Nuclear Structure of Niobium-94 with Statistical Model Calculations PDF eBook
Author Danyal J. Turkoglu
Publisher
Pages 133
Release 2014
Genre
ISBN

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Capture Gamma-Ray Libraries for Nuclear Applications

Capture Gamma-Ray Libraries for Nuclear Applications
Title Capture Gamma-Ray Libraries for Nuclear Applications PDF eBook
Author
Publisher
Pages
Release 2010
Genre
ISBN

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The neutron capture reaction is useful in identifying and analyzing the gamma-ray spectrum from an unknown assembly as it gives unambiguous information on its composition. This can be done passively or actively where an external neutron source is used to probe an unknown assembly. There are known capture gamma-ray data gaps in the ENDF libraries used by transport codes for various nuclear applications. The Evaluated Gamma-ray Activation file (EGAF) is a new thermal neutron capture database of discrete line spectra and cross sections for over 260 isotopes that was developed as part of an IAEA Coordinated Research Project. EGAF has been used to improve the capture gamma production in ENDF libraries. For medium to heavy nuclei the quasi continuum contribution to the gamma cascades is not experimentally resolved. The continuum contains up to 90percent of all the decay energy an is modeled here with the statistical nuclear structure code DICEBOX. This code also provides a consistency check of the level scheme nuclear structure evaluation. The calculated continuum is of sufficient accuracy to include in the ENDF libraries. This analysis also determines new total thermal capture cross sections and provides an improved RIPL database. For higher energy neutron capture there is less experimental data available making benchmarking of the modeling codes more difficult. We use CASINO, a version of DICEBOX that is modified for this purpose. This can be used to simulate the neutron capture at incident neutron energies up to 20 MeV to improve the gamma-ray spectrum in neutron data libraries used for transport modelling of unknown assemblies.

Capture Gamma-ray Spectroscopy And Related Topics - Proceedings Of The Fourteenth International Symposium

Capture Gamma-ray Spectroscopy And Related Topics - Proceedings Of The Fourteenth International Symposium
Title Capture Gamma-ray Spectroscopy And Related Topics - Proceedings Of The Fourteenth International Symposium PDF eBook
Author Paul E Garrett
Publisher World Scientific
Pages 680
Release 2013-03-08
Genre Science
ISBN 9814513830

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The book contains the proceedings of the 14th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics held at the University of Guelph from August 28 through September 2, 2011. The proceedings cover topics of nuclear structure, nuclear reactions, nuclear astrophysics, fundamental symmetries in nuclei, statistical aspects of nuclei, and new techniques and applications, from forefront researchers in their fields.

Neutron Capture Gamma-Ray Libraries for Nuclear Applications

Neutron Capture Gamma-Ray Libraries for Nuclear Applications
Title Neutron Capture Gamma-Ray Libraries for Nuclear Applications PDF eBook
Author
Publisher
Pages 9
Release 2010
Genre
ISBN

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The neutron capture reaction is useful in identifying and analyzing the gamma-ray spectrum from an unknown assembly as it gives unambiguous information on its composition. this can be done passively or actively where an external neutron source is used to probe an unknown assembly. There are known capture gamma-ray data gaps in the ENDF libraries used by transport codes for various nuclear applications. The Evaluated Gamma-ray Activation file (EGAF) is a new thermal neutron capture database of discrete line spectra and cross sections for over 260 isotopes that was developed as part of an IAEA Coordinated Research project. EGAF is being used to improve the capture gamma production in ENDF libraries. For medium to heavy nuclei the quasi continuum contribution to the gamma cascades is not experimentally resolved. The continuum contains up to 90% of all the decay energy and is modeled here with the statistical nuclear structure code DICEBOX. This code also provides a consistency check of the level scheme nuclear structure evaluation. The calculated continuum is of sufficient accuracy to include in the ENDF libraries. This analysis also determines new total thermal capture cross sections and provides an improved RIPL database. For higher energy neutron capture there is less experimental data available making benchmarking of the modeling codes more difficult. They are investigating the capture spectra from higher energy neutrons experimentally using surrogate reactions and modeling this with Hauser-Feshbach codes. This can then be used to benchmark CASINO, a version of DICEBOX modified for neutron capture at higher energy. This can be used to simulate spectra from neutron capture at incident neutron energies up to 20 MeV to improve the gamma-ray spectrum in neutron data libraries used for transport modeling of unknown assemblies.

Non-Destructive Material Characterization Methods

Non-Destructive Material Characterization Methods
Title Non-Destructive Material Characterization Methods PDF eBook
Author Akira Otsuki
Publisher Elsevier
Pages 842
Release 2023-09-01
Genre Science
ISBN 0323984789

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Non-Destructive Material Characterization Methods provides readers with a trove of theoretical and practical insight into how to implement different non-destructive testing methods for effective material characterization. The book starts with an introduction to the field before moving right into a discussion of a wide range of techniques that can be immediately implemented. Various imaging and microscopy techniques are first covered, with step-by-step insights on characterization using a polarized microscope, an atomic force microscope, computed tomography, ultrasonography, magnetic resonance imaging, infrared tomography, and more. Each chapter includes case studies, applications, and recent developments. From there, elemental assay and mapping techniques are discussed, including Raman spectroscopy, UV spectroscopy, atomic absorption spectroscopy, neutron activation analysis, and various others. The book concludes with sections covering displacement measurement techniques, large-scale facility techniques, and methods involving multiscale analysis and advanced analysis. - Provides an overview of a wide-range of NDT material characterization methods, strengths and weaknesses of these methods, when to apply them, and more - Includes eddy current sensing and imaging, ultrasonic sensing and imaging, RF and THz imaging, internet and cloud-based methods, among many others - Presents case studies, applications and other insights on putting these methods into practice

Capture Gamma-Ray Spectroscopy and Related Topics

Capture Gamma-Ray Spectroscopy and Related Topics
Title Capture Gamma-Ray Spectroscopy and Related Topics PDF eBook
Author Andreas Woehr
Publisher American Inst. of Physics
Pages 690
Release 2006-03-16
Genre Science
ISBN 9780735403130

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The International Conferences on Capture Gamma-Ray Spectroscopy and Related Topics are the primary interdisciplinary low energy physics conference held in the world. This meeting alternates every three years between Europe and the U.S.A, and topics on the applications of nuclear physics are discussed. Included are nuclear astrophysics as well as nuclear energy and other potential uses for safeguards of nuclear weapons and homeland security.