Study of Halpern-type 4? Neutron Detector [with List of References
Author | : |
Publisher | : |
Total Pages | : 45 |
Release | : 1967 |
Genre | : |
ISBN | : |
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Author | : |
Publisher | : |
Total Pages | : 45 |
Release | : 1967 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 45 |
Release | : 1967 |
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Author | : United States. Superintendent of Documents |
Publisher | : |
Total Pages | : 1214 |
Release | : 1967-07 |
Genre | : Government publications |
ISBN | : |
Author | : H. M. Gerstenberg |
Publisher | : Forgotten Books |
Total Pages | : 52 |
Release | : 2017-10-28 |
Genre | : Technology & Engineering |
ISBN | : 9780266854968 |
Excerpt from Study of a Halpern-Type 4π Neutron Detector The study of photonuclear interactions by measurements of photoneutron cross sections has been very fruitful. This is primarily because the photoneutron cross section represents a large percentage of the total absorption cross section; the percentage ranges from about 50% for the light elements to about 90% for the heavier elements such as lead. Of almost equal importance, however, is the fact that neutrons weakly interact with matter. This allows the use of thick targets and compensates for the relatively low photon yield available from accelerators such as the betatron. Unfortunately, the magnitude of the photoneutron cross sections, as measured in different laboratories, show differences of as much as The problem may be due, in part at least, to the detectors used to measure the photoneutron yields. The most commonly used system is a relatively simple 4h neutron detector which moderates and then captures the neutrons emitted from the target. It is possible that variations in the designs of these detectors resulting in non-uniform responses as a function of neutron energy may have caused the discrepancies in the measured neutron cross sections. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author | : United States. Department of Commerce |
Publisher | : |
Total Pages | : 72 |
Release | : 1968 |
Genre | : Commerce |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 592 |
Release | : 1967 |
Genre | : Industries |
ISBN | : |
Author | : Tapan Chatterji |
Publisher | : Elsevier |
Total Pages | : 574 |
Release | : 2005-11-29 |
Genre | : Science |
ISBN | : 0080457053 |
Neutron Scattering from Magnetic Materials is a comprehensive account of the present state of the art in the use of the neutron scattering for the study of magnetic materials. The chapters have been written by well-known researchers who are at the forefront of this field and have contributed directly to the development of the techniques described. Neutron scattering probes magnetic phenomena directly. The generalized magnetic susceptibility, which can be expressed as a function of wave vector and energy, contains all the information there is to know about the statics and dynamics of a magnetic system and this quantity is directly related to the neutron scattering cross section. Polarized neutron scattering techniques raise the sophistication of measurements to even greater levels and gives additional information in many cases. The present book is largely devoted to the application of polarized neutron scattering to the study of magnetic materials. It will be of particular interest to graduate students and researchers who plan to investigate magnetic materials using neutron scattering. · Written by a group of scientist who have contributed directly in developing the techniques described.· A complete treatment of the polarized neutron scattering not available in literature.· Gives practical hits to solve magnetic structure and determine exchange interactions in magnetic solids.· Application of neutron scattering to the study of the novel electronic materials.
Author | : International Atomic Energy Agency |
Publisher | : |
Total Pages | : 788 |
Release | : 1968 |
Genre | : Nuclear energy |
ISBN | : |
Author | : Yurii A. Izyumov |
Publisher | : Springer Science & Business Media |
Total Pages | : 607 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 1468407120 |
The inter action between the magnetic field generated by the neutron and the magnetic moment of atoms containing unpaired electrons was experimentally demonstrated for the first time about twenty years ago. The basic theory describing such an in teraction had already been developed and the first nuclear reactors with large available thermal neutron fluxes had recently been con structed. The power of the magnetic neutron interaction for in vestigating the structure of magnetic materials was immediately recognized and put to use where possible. Neutron diffraction, however, was practicable only in countries with nuclear reactors. The earliest neutron determinations of magnetic ordering were hence primarily carried out at Oak Ridge and Brookhaven in the US, at Chalk River in Canada and at Harwell in England. Diffraction patterns from polycrystalline ferromagnets and antiferromagnets are interpretable if produced by simple spin arrays. More complex magnetic scattering patterns could often be unravelled, in terms of a three-dimensional array of atomic moments, if the specimen studied is a single crystal. The devel opment of sophisticated cryogenic equipment, with independently alignable magnetic fields, opened the way to greater complexity in the magnetic structures that could be successfully determined, as did also the introduction of polarized neutron beams. By the end of the 'sixties, many countries were contributing significantly to neutron diffraction studies of a wide variety of magnetic materials.
Author | : Gen Shirane |
Publisher | : Cambridge University Press |
Total Pages | : 0 |
Release | : 2006-05-11 |
Genre | : Science |
ISBN | : 9780521025898 |
This practical guidebook is written for graduate and post-doctoral students, as well as for experienced researchers new to neutron scattering. Introductory chapters summarize useful scattering formulas and describe the components of a spectrometer. The authors then discuss the resolution function and focusing effects. Simple examples of phonon and magnon measurements are presented. Important chapters cover spurious effects in inelastic and elastic measurements, and how to avoid them. The last chapter covers techniques for, and applications of, polarization analysis.