Download or read book Weapons Radiation Shielding Handbook Chapter 3 Methods Calculating Neutron and Gamma Ray Attenuation written by Paul N. Stevens and published by . This book was released on 1971 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculations of the attenuation of neutrons and gamma rays in shields can be performed by several techniques, the best technique for a particular problem depending on the type of problem to be solved and the degree of accuracy required. This chapter of the Handbook surveys the calculational methods used most frequently and provides summaries of digital computer codes based on the various methods. The methods covered are those of spherical harmonics, discrete ordinates, moments, Monte Carlo, diffusion theory, invariant imbedding, and kernels, plus a method which combines a removal kernel with diffusion theory. Except for the invariant imbedding method, all these techniques are either approximate solutions to the well-known Boltzmann equation or are based on kernels obtained from solutions to the equation. A discussion of the Boltzmann equation is also included. (Author).

Download or read book Weapons Radiation Shielding Handbook Chapter 3 Methods for Calculating Neutron and Gamma ray Attenuation written by Paul N. Stevens and published by . This book was released on 1968 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculations of the attenuation of neutrons and gamma rays in shields can be performed by several techniques, the best technique for a particular problem depending on the type of problem to be solved and the degree of accuracy required. This chapter of the Handbook surveys the calculational methods used most frequently and provides summaries of digital computer codes based on the various methods. The methods covered are those of spherical harmonics, discrete ordinates, moments, Monte Carlo, diffusion theory, invariant imbedding, and kernels, plus a method which combines a removal kernel with diffusion theory. Except for the invariant imbedding method, all these techniques are either approximate solutions to the well-known Boltzmann equation or are based on kernels obtained from solutions to the equation. A discussion of the Boltzmann equation is also included in the chapter. (Author).

Download or read book WEAPONS RADIATION SHIELDING HANDBOOK CHAPTER 3 METHODS FOR CALCULATING NEUTRON AND GAMMA RAY ATTENUATION written by and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods for Calculating Neutron and Gamma ray Attenuation written by Lorraine S. Abbott and published by . This book was released on 1968 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Weapons Radiation Shielding Handbook written by Paul N. Stevens and published by . This book was released on 1971 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Weapons Radiation Shielding Handbook written by Paul N. Stevens and published by . This book was released on 1970 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Weapons Radiation Shielding Handbook Chapter 4 Neutron and Gamma ray Albedos written by Wade E. Selph and published by . This book was released on 1967 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air-filled openings through weapons radiation shields (for example, ducts, passageways, etc.) can increase the total amount of radiation penetrating the shield, primarily as a result of radiation successively scattering from the walls of the openings. Most techniques that have been developed for estimating the transmission of radiation through such openings depend on the use of albedos, an albedo being the fraction of radiation incident on a surface that is reflected back out of the material, assuming that the radiation enters and emerges at the same point. This chapter of the Handbook surveys the work performed to date on the various types of nuclear radiation albedos and uses a consistent nomenclature which shows the relationship of the results obtained in the different studies. Since the material considered most often for weapons radiation shields is concrete, most of the albedo data are for this material, although some data have been obtained for other materials, particularly for soils. The data are reported as singly differential albedos (differential with respect to the emergent angle), doubly differential albedos (differential with respect to both the emergent energy and the emergent angle), and total albedos (albedos for which the data have been integrated over both the emergent energy and emergent angle). Three fundamental types of differential and total albedos are used: an albedo which represents an incident flux of particles and an emergent current of particles, an albedo which represents an incident current and an emergent current, and an albedo which represents an incident flux and an emergent flux. These fundamental albedos may be weighted by dose response functions or by energy.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1968-07 with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Weapons Radiation Shielding Handbook Chapter 2 Basic Concepts of Radiation Shielding Analysis written by Paul N. Stevens and published by . This book was released on 1970 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: The basic concepts underlying the methods used for weapons radiation shield analysis are described in this chapter. They include the quantities used to describe particle populations and the quantities used to describe radiation interactions with materials. The characteristics of the particular radiations produced by weapons, neutrons and gamma rays, are discussed in detail, including their physical properties and their important interactions. The production processes whereby neutrons and gamma rays are produced are also described. In addition, the chapter discusses the various response functions that are used to convert a radiation field to a biological effect. (Author).

Download or read book The Physics Problems of Reactor Shielding written by International Atomic Energy Agency and published by . This book was released on 1971 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1968 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Monthly Accession List written by Radiation Effects Information Center (Columbus, Ohio). and published by . This book was released on 1968 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book William B McGuire Nuclear Station Units 1 2 Construction written by and published by . This book was released on 1972 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: