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Book Relative High Energy Neutron Yields from Targets Bombarded with Protons and Deuterons UCRL 440

Download or read book Relative High Energy Neutron Yields from Targets Bombarded with Protons and Deuterons UCRL 440 written by William J. Knox and published by . This book was released on 1950 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Relative neutron yields in the forward direction from various target elements bombarded with 350 Mev protons and 190 Mev deuterons have been measured. Bismuth fission chambers with a threshold of about 50 Mev were used to detect the high energy neutrons. The actual flux of protons or deuterons traversing each target was determined from the activities induced in graphite monitors attached to the target. When a deuteron beam is used, the neutron yields for light elements agree with the values predicted by the deuteron stripping theory. For the heavy elements the observed values are fitted best by adding a function proportional to Z-sq to the stripping theory values. This may be interpreted as evidence for the production of high energy neutrons by the electric field disintegration of the deuteron. The neutron yields from the proton beam vary approximately as (A - Z)(exp(2/3)) for target elements from C to U. This indicates that the heavy elements are not completely transparent to 350 Mev protons. Beryllium has an anomalous neutron yield 50% higher than that for C. Calculations and measurements on the problem of multiple traversals of beam particles through thin targets are presented.

Book Energy Distribution of Protons from a Target Bombarded by 190 MeV Deuterons

Download or read book Energy Distribution of Protons from a Target Bombarded by 190 MeV Deuterons written by and published by . This book was released on 1947 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous experimental work by Helmholz, McMillan, and Sewell has shown that a narrow beam of high energy neutrons is produced when a beam of 190 Mev deuterons strikes a thin target. The mechanism for the production of the eutrons has been discussed by Serber, who describes a process in which the proton in the deuteron strikes the edge of nucleus in the target and is stripped off, while the neutron misses and continues on its way. It is to be expected that an equal umber of high energy protons are produced by stripping processes in which it is the neutron that hits the nucleus. These high energy protons have been detected by (1) carbon activation, and (2) photographic plates. Both methods give energy distributions in agreement with the energy distribution predicted for protons produced by the stripping process.

Book The High energy Charged Particles from Targets Bombarded by 190 Mev Deuterons thesis

Download or read book The High energy Charged Particles from Targets Bombarded by 190 Mev Deuterons thesis written by Larry Schecter and published by . This book was released on 1953 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation has been made of the angle and energy distributions of the high energy charged particles which emerge from beryllium, carbon, and uranium nuclei bombarded by 190 Mev deuterons. The results indicate that the yields can be explained as primarily due to two kinds of processes; nucleon-nucleon interactions, and stripping. Under this assumption, the total stripping cross section has been determined to be 0.35 ℗± 0.03 barns for the lighter elements and 2.6 ℗± 0.4 barns for uranium. These values suggest an A2/3 dependence for this cross section.

Book Angular Distribution of N d Scattering for 2 5 Mev Neutrons

Download or read book Angular Distribution of N d Scattering for 2 5 Mev Neutrons written by J. H. Coon and published by . This book was released on 1946 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Physics of Nuclei and Particles

Download or read book Physics of Nuclei and Particles written by Pierre Marmier and published by Academic Press. This book was released on 2013-10-22 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physics of Nuclei and Particles, Volume II explores the prevalent descriptive methods used in nuclear and particle physics, with emphasis on the phenomenological and model-based aspects. The interactions of nuclear particles are discussed, along with nuclear forces and potentials and scattering and reaction models employed in nuclear physics. The nuclear structure and models of the nucleus are also considered. Comprised of four chapters, this volume begins with a review of the characteristics of nucleons and other particles that play a role in nuclear interaction processes in order to gain further insight into the underlying physical problems. Neutron physics, antinucleons, deuteron physics, and two-body nuclear forces are highlighted, together with three- and four- nucleon systems and heavy-ion physics. The next three chapters deal with nuclear forces and potentials, as deduced from nuclear dynamics (scattering and polarization); scattering and reaction models used in nuclear physics; and nuclear models such as the shell model, models of deformed nuclei, and many-body self-consistent models. The book concludes with an analysis of the Brueckner-Bethe-Goldstone theory of nuclear matter. This book will be of interest to physicists.

Book Nuclear Science Abstracts

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Unravelling the Mystery of the Atomic Nucleus

Download or read book Unravelling the Mystery of the Atomic Nucleus written by Bernard Fernandez and published by Springer Science & Business Media. This book was released on 2012-09-28 with total page 541 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unravelling the Mystery of the Atomic Nucleus is a history of atomic and nuclear physics. It begins in 1896 with the discovery of radioactivity, which leads to the discovery of the nucleus at the center of the atom. It follows the experimental discoveries and the theoretical developments up to the end of the Fifties. Unlike previous books regarding on history of nuclear physics, this book methodically describes how advances in technology enabled physicists to probe the physical properties of nuclei as well as how the physical laws which govern these microscopic systems were progressively discovered. The reader will gain a clear understanding of how theory is inextricably intertwined with the progress of technology. Unravelling the Mystery of the Atomic Nucleus will be of interest to physicists and to historians of physics, as well as those interested development of science.

Book An International Bibliography on Atomic Energy

Download or read book An International Bibliography on Atomic Energy written by United Nations. Dept. of Political and Security Council Affairs. Atomic Energy Commission Group and published by . This book was released on 1951 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book An International Bibliography on Atomic Energy

Download or read book An International Bibliography on Atomic Energy written by United Nations. Department of Political and Security Council Affairs. Atomic Energy Commission Group and published by . This book was released on 1951 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Abstracts of Declassified Documents

Download or read book Abstracts of Declassified Documents written by U.S. Atomic Energy Commission and published by . This book was released on 1947 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consists of AECD 1-2023 (no. 1-1779 called MDDC).

Book Bibliography of Research on Deuterium and Tritium Compounds

Download or read book Bibliography of Research on Deuterium and Tritium Compounds written by Lawrence M. Brown and published by . This book was released on 1956 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: