Download or read book Some 3He n and d n Reaction Studies on Light Nuclei Using Fast Neutron Time of flight Techniques written by John Martin Adams and published by . This book was released on 1967 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1966-03 with total page 1544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fast Neutron Yields Generated from Deuteron Break up in Low Energy Reactions of Light Nuclei written by J. Vincour and published by . This book was released on 2001 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigation of neutron production by break-up processes in light-nuclei reactions is described. The energy spectra of neutrons emitted by thick deuterium and helium targets at 0° angle irradiated by a beam of 15.8 MeV protons, 14.1 MeV and 17.1 MeV deuterons, respectively, were measured in an open geometry with stilbene and NE 213 scintillators and with a two-dimensional n-? discrimination technique. Obtained spectral yields were compared with those of p+Be and d+Be reactions at corresponding energies. This comparison shows that the D- and 4He- targets spectra are substantially harder having lower relative contribution of low-energy neutrons. The p+D reaction looks to be the most effective reaction for producing fast neutrons on low energy cyclotrons.
Download or read book Progress in Fast Neutron Physics written by Gerald Cleveland Phillips and published by . This book was released on 1963 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Study of Reactions in Light Nuclei Using Techniques of Pulse Amplitude Analysis written by Anthony Christopher Riviere and published by . This book was released on 1957 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fast Neutron Producing Reactions from N14 and N15 written by Jesse Leo Weil and published by . This book was released on 1958 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photonuclear Reactions written by Evans Hayward and published by . This book was released on 1970 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct Mass Measurements of Light Neutron rich Nuclei Using a Combined Energy and Time of flight Technique written by Chandrasekhara Pillai and published by . This book was released on 1985 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fast Neutron Physics Experiments and theory written by Jerry B. Marion and published by . This book was released on 1963 with total page 1332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of 27Al n X Reactions Up to a Neutron Energy of 400 MeV written by and published by . This book was released on 1994 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prompt?-radiation from the interaction of fast neutrons with Al was measured using the white neutron beam of the WNR facility at the Los Alamos National Laboratory. Partial production cross sections for residual nuclei in the range from F to Al were measured from threshold up to 400 MeV by observing the most intense?-transitions between low lying levels of these nuclei. Two-dimensional neutron time-of-flight versus gamma pulse height spectra from the interaction of the neutrons with Al were observed after flight-paths of about 20 and 40 m with a high-purity Ge-detector. The neutron cross sections for prominent?-transitions in a large number of residual nuclei could be derived with typical uncertainties of 10--20% up to a neutron energy of 400 MeV. The energy resolution varies from H".2 MeV at 10 MeV to H"0 MeV at 400 MeV. In the low energy range (up to 60 MeV) the results are compared with nuclear model calculations using the code GNASH. A very good overall agreement is obtained without special adjustment of parameters.
Download or read book Neutron Physics written by Karl-Heinrich Beckurts and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based upon a series of lectures I have occasionally given at the University of Gottingen since 1951. They were meant to introduce the students of experimental physics to the work in a neutron physics laboratory dealing with the problem of measuring neutron flux, diffusion length, Fermi age, effective neutron temperature, absorption cross sections and similar problems. Moreover, these lectures were intended to prepare the students for a subsequent lecture covering the physics of nuclear reactors. The original character of this series of lectures has been retained in the book. It is intended for use by students as well as anyone desiring to work on neutron physics measurements. The first half mainly covers the theory of neutron fields, i. e. essentially diffusion and slowing down theory. The second half is largely concerned with measurements in neutron fields. The appendix contains information and data which, in our experience, are frequently required in a neutron laboratory. The field of nuclear physics proper is briefly touched upon in the first two chapters, but only to the extent necessary for the understanding of the following chapters. The multitude of applications of neutron radiation has not been covered. The conclusion of this manuscript coincided with the end of my long period of activity with the Max-Planck-Institut fur Physik at Gottingen. To Professor HEISENBERG lowe thanks for his advice and suggestions for many of the subjects treated here.
Download or read book A Double Time of Flight Method For Measuring Proton Light Yield written by Josh Arthur Brown and published by . This book was released on 2017 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic scintillators have been used in conjunction with photomultiplier tubes to detect fast neutrons since the early 1950s. The utility of these detectors is dependent on an understanding of the characteristics of their response to incident neutrons. Since the detected light in organic scintillators in a fast neutron radiation field comes primarily from neutron-proton elastic scattering, the relationship between the light generated in an organic scintillator and the energy of a recoiling proton is of paramount importance for spectroscopy and kinematic imaging. This relationship between proton energy deposited and light production is known as proton light yield. Several categories of measurement methods for proton light yield exist. These include direct methods, indirect methods, and edge characterization techniques. In general, measurements for similar or identical materials in the literature show a large degree of variance among the results. This thesis outlines the development of a new type of indirect method that exploits a double neutron time of flight technique. This new method is demonstrated using a pulsed broad spectrum neutron source at the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory. The double time of flight method for proton light yield measurements was established using two commercially available materials from Eljen Technology. The first is EJ-301, a liquid scintillator with a long history of use. Equivalent materials offered by other manufacturers include NE-213 from Nuclear Enterprise and BC-501A from Saint-Gobain Crystals. The second material tested in this work is EJ-309, a liquid scintillator with a proprietary formulation recently introduced by Eljen Technology with no commercial equivalents. The proton light yield measurements were conducted in concert with several system characterization measurements to provide a result to the community that is representative of the material itself. Additionally, the errors on the measurement were characterized with respect to systematic uncertainties, including an evaluation of the covariance of data points produced and the covariance of fit parameters associated with a semi-empirical model. This work demonstrates the viability of the double time of flight technique for continuous measurement of proton light yield over a broad range of energies without changes to the system configuration. The results of the light yield measurements on EJ-301 and EJ-309 suggest answers to two open questions in the literature. The first is that the size of the scintillation detector used to measure the proton light yield should not effect the result if the spatial distributions of Compton electrons and proton recoils are equivalent. Second, the shape of the scintillation detector should not effect the light yield with the same constraint on the spatial distributions. A characterized hardware and software framework has been developed, capable of producing proton light yield measurements on additional materials of interest. The acquisition, post processing, error analysis, and simulation software were developed to permit characterization of double time of flight measurements for a generic system, allowing it to be utilized to acquire and analyze data for an array of scintillation detectors regardless of detector size or geometric configuration. This framework establishes an extensible capability for performing proton light yield measurements to support basic and applied scientific inquiry and advanced neutron detection using organic scintillators.
Download or read book Studies of n t reactions on light nuclei written by Ahmad Suhaimi and published by . This book was released on 1988 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutron Emitting Reactions in Light Nuclei written by James Richard Davis and published by . This book was released on 1972 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamental Research with Polarized Slow Neutrons written by P. A. Krupchit︠s︡kiĭ and published by Springer. This book was released on 1987-04-30 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last twenty years polarized beams of slow neutrons have been used effectively in fundamental research in nuclear physics. Parity violation in nuclear fission and neutron optics was discoverd as well as the nuclear precession of neutrons and the coherent interference of spin channels in neutron capture by nuclei. Furthermore, these methods helped to understand better the neutron`s electric dipole moment and its beta decay. This book gives a thorough introduction to these experimental methods including the most recent techniques of generating and analyzing polarized neutral beams. It clearly shows the close relationship between elementary particle physics and nuclear physics, in particular in the section dealing with the effects caused by weak interactions. Special attention is paid to experiments which investigate the violation of quantum mechanical conservation laws. The book not only addresses specialists but also those interested in the foundations of elementary particle and nuclear physics. It is well suited as additional reading for students.
Download or read book Neutron Induced Reactions written by J. Kristiak and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 4th International Symposium, Smolenice, June 17-21, 1985
Download or read book Experimental Studies of a n Reactions of Light Nuclei written by Jan Kjellman and published by . This book was released on 1962 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
