Author: Kimberly Ann Burns
Publisher:
ISBN:
Category : Computer simulation
Languages : en
Pages :
Book Description
The accurate and efficient simulation of coupled neutron-photon problems is necessary for several important radiation detection applications. Examples include the detection of nuclear threats concealed in cargo containers and prompt gamma neutron activation analysis for nondestructive determination of elemental composition of unknown samples. In these applications, high-resolution gamma-ray spectrometers are used to preserve as much information as possible about the emitted photon flux, which consists of both continuum and characteristic gamma rays with discrete energies. Monte Carlo transport is the most commonly used modeling tool for this type of problem, but computational times for many problems can be prohibitive. This work explored the use of coupled Monte Carlo-deterministic methods for the simulation of neutron-induced photons for high-resolution gamma-ray spectroscopy applications. A method was developed for the implementation of coupled neutron-photon problems into RAdiation Detection Scenario Analysis Toolbox (RADSAT), a computer code that couples the complementary strengths of discrete-ordinate and Monte Carlo approaches to obtain high-resolution detector responses. Central to this work was the development of a method for generating multi-group neutron-photon cross-sections in a way that separates the discrete and continuum photon emissions so that the key signatures in neutron activation analysis (i.e., the characteristic line energies) are preserved. The mechanics of the cross-section preparation method are described and contrasted with standard neutron-gamma cross-section sets. These custom cross-sections were then applied to several benchmark problems using the method developed in this work. Multi-group results for neutron and photon flux are compared to MCNP results. Finally, calculated responses of high-resolution spectrometers were compared. The added computational efficiency of the coupled Monte Carlo-deterministic method and the positive agreement achieved in the code-to-code verification make the integration of the coupled neutron-photon method into RADSAT a promising endeavor.
Coupled Multi-group Neutron Photon Transport for the Simulation of High-resolution Gamma-ray Spectroscopy Applications
Author: Kimberly Ann Burns
Publisher:
ISBN:
Category : Computer simulation
Languages : en
Pages :
Book Description
The accurate and efficient simulation of coupled neutron-photon problems is necessary for several important radiation detection applications. Examples include the detection of nuclear threats concealed in cargo containers and prompt gamma neutron activation analysis for nondestructive determination of elemental composition of unknown samples. In these applications, high-resolution gamma-ray spectrometers are used to preserve as much information as possible about the emitted photon flux, which consists of both continuum and characteristic gamma rays with discrete energies. Monte Carlo transport is the most commonly used modeling tool for this type of problem, but computational times for many problems can be prohibitive. This work explored the use of coupled Monte Carlo-deterministic methods for the simulation of neutron-induced photons for high-resolution gamma-ray spectroscopy applications. A method was developed for the implementation of coupled neutron-photon problems into RAdiation Detection Scenario Analysis Toolbox (RADSAT), a computer code that couples the complementary strengths of discrete-ordinate and Monte Carlo approaches to obtain high-resolution detector responses. Central to this work was the development of a method for generating multi-group neutron-photon cross-sections in a way that separates the discrete and continuum photon emissions so that the key signatures in neutron activation analysis (i.e., the characteristic line energies) are preserved. The mechanics of the cross-section preparation method are described and contrasted with standard neutron-gamma cross-section sets. These custom cross-sections were then applied to several benchmark problems using the method developed in this work. Multi-group results for neutron and photon flux are compared to MCNP results. Finally, calculated responses of high-resolution spectrometers were compared. The added computational efficiency of the coupled Monte Carlo-deterministic method and the positive agreement achieved in the code-to-code verification make the integration of the coupled neutron-photon method into RADSAT a promising endeavor.
Publisher:
ISBN:
Category : Computer simulation
Languages : en
Pages :
Book Description
The accurate and efficient simulation of coupled neutron-photon problems is necessary for several important radiation detection applications. Examples include the detection of nuclear threats concealed in cargo containers and prompt gamma neutron activation analysis for nondestructive determination of elemental composition of unknown samples. In these applications, high-resolution gamma-ray spectrometers are used to preserve as much information as possible about the emitted photon flux, which consists of both continuum and characteristic gamma rays with discrete energies. Monte Carlo transport is the most commonly used modeling tool for this type of problem, but computational times for many problems can be prohibitive. This work explored the use of coupled Monte Carlo-deterministic methods for the simulation of neutron-induced photons for high-resolution gamma-ray spectroscopy applications. A method was developed for the implementation of coupled neutron-photon problems into RAdiation Detection Scenario Analysis Toolbox (RADSAT), a computer code that couples the complementary strengths of discrete-ordinate and Monte Carlo approaches to obtain high-resolution detector responses. Central to this work was the development of a method for generating multi-group neutron-photon cross-sections in a way that separates the discrete and continuum photon emissions so that the key signatures in neutron activation analysis (i.e., the characteristic line energies) are preserved. The mechanics of the cross-section preparation method are described and contrasted with standard neutron-gamma cross-section sets. These custom cross-sections were then applied to several benchmark problems using the method developed in this work. Multi-group results for neutron and photon flux are compared to MCNP results. Finally, calculated responses of high-resolution spectrometers were compared. The added computational efficiency of the coupled Monte Carlo-deterministic method and the positive agreement achieved in the code-to-code verification make the integration of the coupled neutron-photon method into RADSAT a promising endeavor.
Coupled Multi-group Neutron Photon Transport for the Simulation of High-resolution Gamma-ray Spectroscopy Applications
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 170
Book Description
The accurate and efficient simulation of coupled neutron-photon problems is necessary for several important radiation detection applications. Examples include the detection of nuclear threats concealed in cargo containers and prompt gamma neutron activation analysis for nondestructive determination of elemental composition of unknown samples.
Publisher:
ISBN:
Category :
Languages : en
Pages : 170
Book Description
The accurate and efficient simulation of coupled neutron-photon problems is necessary for several important radiation detection applications. Examples include the detection of nuclear threats concealed in cargo containers and prompt gamma neutron activation analysis for nondestructive determination of elemental composition of unknown samples.
Theory of Quadsitron-Energy Connectivity
Author: Lane B. Scheiber II MD
Publisher: iUniverse
ISBN: 1532071507
Category : Science
Languages : en
Pages : 394
Book Description
The luminous aether, a concept known for hundreds of years, is the fine essence of the universe. Over the last 130 years, mainstream science abandoned the knowledge such an aether existed. Yet, reawakening the principles of a luminous aether as the fabric of space--both within our being and surrounding us, reaching out in every direction to the very edges of the universe-- explains many unsolved mysteries. The luminous aether is a vast three-dimensional ocean of the tiniest and most elemental particles called quadsitrons. From the fusion of quadsitrons and energy, all else in the universe is constructed. The dynamics of quadsitrons interacting with energy accounts for and connects all the micro and macrophenomena that fill our lives, such as gravity, light, electrons, atoms, molecules, and magnetism. It is essential we understand and grasp the principles of this wondrous quadsitron-energy connectivity in order to advance our technology forward to interstellar travel.
Publisher: iUniverse
ISBN: 1532071507
Category : Science
Languages : en
Pages : 394
Book Description
The luminous aether, a concept known for hundreds of years, is the fine essence of the universe. Over the last 130 years, mainstream science abandoned the knowledge such an aether existed. Yet, reawakening the principles of a luminous aether as the fabric of space--both within our being and surrounding us, reaching out in every direction to the very edges of the universe-- explains many unsolved mysteries. The luminous aether is a vast three-dimensional ocean of the tiniest and most elemental particles called quadsitrons. From the fusion of quadsitrons and energy, all else in the universe is constructed. The dynamics of quadsitrons interacting with energy accounts for and connects all the micro and macrophenomena that fill our lives, such as gravity, light, electrons, atoms, molecules, and magnetism. It is essential we understand and grasp the principles of this wondrous quadsitron-energy connectivity in order to advance our technology forward to interstellar travel.
RADSAT Benchmarks for Prompt Gamma Neutron Activation Analysis Measurements
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The accurate and efficient simulation of coupled neutron-photon problems is necessary for several important radiation detection applications. Examples include the detection of nuclear threats concealed in cargo containers and prompt gamma neutron activation analysis for nondestructive determination of elemental composition of unknown samples. High-resolution gamma-ray spectrometers are used in these applications to measure the spectrum of the emitted photon flux, which consists of both continuum and characteristic gamma rays with discrete energies. Monte Carlo transport is the most commonly used simulation tool for this type of problem, but computational times can be prohibitively long. This work explores the use of multi-group deterministic methods for the simulation of coupled neutron-photon problems. The main purpose of this work is to benchmark several problems modeled with RADSAT and MCNP to experimental data. Additionally, the cross section libraries for RADSAT are updated to include ENDF/B-VII cross sections. Preliminary findings show promising results when compared to MCNP and experimental data, but also areas where additional inquiry and testing are needed. The potential benefits and shortcomings of the multi-group-based approach are discussed in terms of accuracy and computational efficiency.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The accurate and efficient simulation of coupled neutron-photon problems is necessary for several important radiation detection applications. Examples include the detection of nuclear threats concealed in cargo containers and prompt gamma neutron activation analysis for nondestructive determination of elemental composition of unknown samples. High-resolution gamma-ray spectrometers are used in these applications to measure the spectrum of the emitted photon flux, which consists of both continuum and characteristic gamma rays with discrete energies. Monte Carlo transport is the most commonly used simulation tool for this type of problem, but computational times can be prohibitively long. This work explores the use of multi-group deterministic methods for the simulation of coupled neutron-photon problems. The main purpose of this work is to benchmark several problems modeled with RADSAT and MCNP to experimental data. Additionally, the cross section libraries for RADSAT are updated to include ENDF/B-VII cross sections. Preliminary findings show promising results when compared to MCNP and experimental data, but also areas where additional inquiry and testing are needed. The potential benefits and shortcomings of the multi-group-based approach are discussed in terms of accuracy and computational efficiency.
Energy Research Abstracts
The Development and Application of a Coupled Monte Carle Neutron-photon Transport Code
Author: Paul Albert Robinson
Publisher:
ISBN:
Category :
Languages : en
Pages : 172
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 172
Book Description
Nuclear Science Abstracts
NBS Special Publication
Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 684
Book Description
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 684
Book Description
Publications of the National Institute of Standards and Technology ... Catalog
Author: National Institute of Standards and Technology (U.S.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 680
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 680
Book Description
Passive Nondestructive Assay of Nuclear Materials
Author: Doug Reilly
Publisher:
ISBN: 9780160327247
Category : Non-destructive testing
Languages : en
Pages : 700
Book Description
Publisher:
ISBN: 9780160327247
Category : Non-destructive testing
Languages : en
Pages : 700
Book Description