Neutron Scattering – Fundamentals

Neutron Scattering – Fundamentals
Author: Masatoshi Arai
Publisher: Elsevier Inc. Chapters
Total Pages: 108
Release: 2013-11-22
Genre: Science
ISBN: 0128066490

In this chapter, neutron experimental techniques are described. The chapter covers the basics of neutron scattering, neutron source characteristics, diffraction techniques, inelastic neutron scattering, instruments for semi-macroscopic structure analysis, detectors, optics, choppers, and some concepts for instrument design. Techniques for both steady and pulsed sources are described, with more emphasis on the latter in view of the recent worldwide trend toward pulsed sources, generally pulsed spallation sources. The source character, even within the class of pulsed sources, has a significant influence on instrument design. Inelasticity effects in the total scattering technique are clearly specified in the chapter. Some details of chopper instruments, including resolution effects, are described, since this class of instruments has recently received considerable innovative development and use over a wide range of science. Recent developments in scintillation detectors are discussed as an alternative technology to more conventional 3He detectors. Optical components are becoming more and more important not only for neutron transport but also for background reduction. Neutron spin-echo techniques are presented as an example of the exploitation of polarized neutrons.

Elements of Slow-Neutron Scattering

Elements of Slow-Neutron Scattering
Author: J. M. Carpenter
Publisher: Cambridge University Press
Total Pages: 539
Release: 2015-09-24
Genre: Science
ISBN: 0521857813

This book provides a comprehensive and up-to-date introduction to the fundamental theory and applications of slow-neutron scattering.

A Method of Evaluating Fast-neutron Differential Scattering Cross Sections with Short Experimental Runs

A Method of Evaluating Fast-neutron Differential Scattering Cross Sections with Short Experimental Runs
Author: V. V. Verbinski
Publisher:
Total Pages: 36
Release: 1967
Genre:
ISBN:

The method utilized a pulsed neutron source with a smooth, broad spectrum, making it possible to measure neutron scattering from 0.5 to 10 MeV in a single run of 1 to 2 hr duration for each scattering angle. Scattering samples of carbon, aluminum, iron, lithium hydride, and concrete about 5 cm in diameter were located about 1/3 meter from the pulsed neutron source, and neutrons scattered through an angle theta were directed down a 55-meter flight path to a liquid organic scintillator used to measure the time-of-flight spectrum of scattered neutrons. The energy-dependent neutron intensity thus obtained was compared with Monte Carlo calculations whose inputs were the measured neutron source term and neutron elastic, inelastic, and reaction cross sections compiled from the existing literature. The comparison provides direct corrections to the cross sections because single scattering is about ten times more probable than multiple scattering with the sample sizes chosen. This method provides an unambiguous check on the elastic differential scattering cross sections used as input for the Monte Carlo calculations, and good first-order corrections to these cross sections. (Author).

Theory of Neutron Scattering from Condensed Matter

Theory of Neutron Scattering from Condensed Matter
Author: Stephen W. Lovesey
Publisher: Oxford University Press on Demand
Total Pages: 310
Release: 1986-10
Genre: Science
ISBN: 9780198520290

"Neutron scattering measurements provide information at an atomic level on the chemical and physical properties of matter. The unique character of the neutron-matter interaction means that in many instances the information is obtainable in no other way. The book develops the principles and concepts of statistical physics and quantum chemistry that are the basis for the interpretation of experimental data. The topics include elastic nuclear scattering, scattering by lattice vibrations and by liquids, and some chemical applications (vol. 1) and elastic and inelastic magnetic scattering (vol. 2). These two volumes will be of interest to graduate students and workers and researchers in the field of neutron scattering"--back cover/