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Summary Of Neutron Measurement Methods

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Summary Of Neutron Measurement Methods

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Author : Herman Lunden Miller
language : en
Publisher:
Release Date : 1962

Summary Of Neutron Measurement Methods written by Herman Lunden Miller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Gamma rays categories.

An Analysis Technique For Active Neutron Multiplicity Measurements Based On First Principles

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Author :
language : en
Publisher:
Release Date : 2012

An Analysis Technique For Active Neutron Multiplicity Measurements Based On First Principles written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.

Passive neutron multiplicity counting is commonly used to quantify the total mass of plutonium in a sample, without prior knowledge of the sample geometry. However, passive neutron counting is less applicable to uranium measurements due to the low spontaneous fission rates of uranium. Active neutron multiplicity measurements are therefore used to determine the 235U mass in a sample. Unfortunately, there are still additional challenges to overcome for uranium measurements, such as the coupling of the active source and the uranium sample. Techniques, such as the coupling method, have been developed to help reduce the dependence of calibration curves for active measurements on uranium samples; although, they still require similar geometry known standards. An advanced active neutron multiplicity measurement method is being developed by Texas A & M University, in collaboration with Los Alamos National Laboratory (LANL) in an attempt to overcome the calibration curve requirements. This method can be used to quantify the 235U mass in a sample containing uranium without using calibration curves. Furthermore, this method is based on existing detectors and nondestructive assay (NDA) systems, such as the LANL Epithermal Neutron Multiplicity Counter (ENMC). This method uses an inexpensive boron carbide liner to shield the uranium sample from thermal and epithermal neutrons while allowing fast neutrons to reach the sample. Due to the relatively low and constant fission and absorption energy dependent cross-sections at high neutron energies for uranium isotopes, fast neutrons can penetrate the sample without significant attenuation. Fast neutron interrogation therefore creates a homogeneous fission rate in the sample, allowing for first principle methods to be used to determine the 235U mass in the sample. This paper discusses the measurement method concept and development, including measurements and simulations performed to date, as well as the potential limitations.

Summary Of Neutron Measurements For The Viking Program

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Author : M. E. Anderson
language : en
Publisher:
Release Date : 1975

Summary Of Neutron Measurements For The Viking Program written by M. E. Anderson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Neutron counters categories.

Dynamics Of Soft Matter

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Author : VICTORIA GARCIA SAKAI
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-12-19

Dynamics Of Soft Matter written by VICTORIA GARCIA SAKAI and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-12-19 with Technology & Engineering categories.

Dynamics of Soft Matter: Neutron Applications provides an overview of neutron scattering techniques that measure temporal and spatial correlations simultaneously, at the microscopic and/or mesoscopic scale. These techniques offer answers to new questions arising at the interface of physics, chemistry, and biology. Knowledge of the dynamics at these levels is crucial to understanding the soft matter field, which includes colloids, polymers, membranes, biological macromolecules, foams, emulsions towards biological & biomimetic systems, and phenomena involving wetting, friction, adhesion, or microfluidics. Emphasizing the complementarities of scattering techniques with other spectroscopic ones, this volume also highlights the potential gain in combining techniques such as rheology, NMR, light scattering, dielectric spectroscopy, as well as synchrotron radiation experiments. Key areas covered include polymer science, biological materials, complex fluids and surface science.

Handbook Of Prompt Gamma Activation Analysis

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Author : G. Molnar
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-02-23

Handbook Of Prompt Gamma Activation Analysis written by G. Molnar and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-02-23 with Science categories.

Prompt gamma activation analysis (PGAA) is a unique, non-destructive nuclear analytical method with multi-element capabilities. It is most effective if intense neutron beams (especially cold beams) of nuclear reactors are used to induce the prompt gamma radiation. Based largely on the authors' pioneering research in cold neutron PGAA, the handbook describes the methodology in self-contained manner and reviews recent applications. The library of prompt gamma ray data and spectra for all natural elements is a unique aid to the practitioner. The level is understandable by a broad audience, which facilitates teaching and training. The Handbook of Prompt Gamma Activation Analysis is a comprehensive handbook written for those practising the method, wanting to implement it at a reactor facility, or just looking for a powerful non-destructive method of element analysis. The book is also useful for nuclear physics, chemistry and engineering scientists, scholars and graduate students interested in neutron-induced gamma ray spectroscopy and nuclear analytical methods.