Download or read book Parity and Time reversal Symmetry Nonconservation in Neutron nucleus Interactions written by and published by . This book was released on 1990 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parity non-conversation was studied for seventeen states in the compound nucleus 239U by measuring the helicity dependence of the p-wave resonance cross section for epithermal neutrons scattered from 238U. The root-mean-squared parity-violating matrix element for the mixing of p-wave and s-wave states was determined to be M = 0.58{sub -0.25}{sup +0.50} meV. This corresponds to a parity-violating spreading width of [Gamma]{sup PV} = 1.0 × 10−7 eV. This gives a value of 4 × 10−7 for [alpha]{sub p}, the ratio of strengths of the P-odd and P-even effective nucleon-nucleon interactions in 239U. The implications of these results for studies of Time Reversal Symmetry in the compound nucleus is discussed.
Download or read book Study of Parity and Time Reversal Violation in Neutron nucleus Interactions written by and published by . This book was released on 1994 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The parity and time-reversal symmetries can be studies in neutron-nucleus interactions. Parity non-conserving asymmetries have been observed for many p-wave resonances in a compound nucleus and measurements were performed on several nuclei in the mass region of A∼100 and A∼230. The statistical model of the compound nucleus provides a theoretical basis for extracting mean-squared matrix elements from the experimental asymmetry data, and for interpreting the mean-squared matrix elements. The constraints on the weak meson-exchange couplings calculated from the compound-nucleus asymmetry data agree qualitatively with the results from few-body and light-nuclei experiments. The tests of time-reversal invariance in various experiments using thermal, epithermal and MeV neutrons are being developed.
Download or read book Time Reversal Invariance And Parity Violation In Neutron Reactions Proceedings Of The 2nd International Workshop written by Christopher R Gould and published by World Scientific. This book was released on 1994-01-28 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Workshop on Time Reversal Invariance and Parity Violation in Neutron Reactions focused on the study of parity violation (PV) and time reversal invariance (TRI) in neutron physics. Emphasis was placed on measurements with polarized neutron beams and polarized targets as well as on the implication of recent theoretical developments for the future progress of this rapidly developing and increasingly important field of research.
Download or read book Parity And Time Reversal Violation In Compound Nuclear States And Related Topics Proceedings Of The International written by Auerbach Naftali and published by World Scientific. This book was released on 1996-11-06 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book contains the Proceedings of the 2010 Conference of the Italian Systems Society. Papers deal with the interdisciplinary study of processes of changing related to a wide variety of specific disciplinary aspects. Classical attempts to deal with them, based on generalising approaches used to study the movement of bodies and environmental influence, have included ineffective reductionistic simplifications. Indeed changing also relates, for instance, to processes of acquisition and varying properties such as for software; growing and aging biological systems; learning/cognitive systems; and socio-economic systems growing and developing through innovations. Some approaches to modelling such processes are based on considering changes in structure, e.g., phase-transitions. Other approaches are based on considering (1) periodic changes in structure as for processes of self-organisation; (2) non-periodic but coherent changes in structure, as for processes of emergence; (3) the quantum level of description. Papers in the book study the problem considering its transdisciplinary nature, i.e., systemic properties studied per se and not within specific disciplinary contexts. The aim of these studies is to outline a transdisciplinary theory of change in systemic properties. Such a theory should have simultaneous, corresponding and eventually hierarchical disciplinary aspects as expected for a general theory of emergence. Within this transdisciplinary context, specific disciplinary research activities and results are assumed to be mutually represented as within a philosophical and conceptual framework based on the theoretical centrality of the observer and conceptual non-separability of context and observer, related to logically open systems and Quantum Entanglement. Contributions deal with such issues in interdisciplinary ways considering theoretical aspects and applications from Physics, Cognitive Science, Biology, Artificial Intelligence, Economics, Architecture, Philosophy, Music and Social Systems.
Download or read book Tests of Parity and Time Reversal Invariance in Neutron nucleus Scattering written by and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: I'll discuss the experiments in which parity violation has been measured in low energy neutron-nucleus scattering. The interest is two-fold: to understand how parity violation in the nucleon-nucleon (NN) interaction manifests itself in a complicated many-body system and to show that the large enhancements observed make this a good laboratory to search for violations of TRI. Further, the procedure of relating the measured parity violating asymmetries to the under-lying NN interaction will be important in order to make the same connection in violation of TRI (or in limits). First, I'll make brief comments on some relevant features of low energy neutron scattering and then review the existing measurements of parity violation. I'll try to explain, at least qualitatively, the origin of the large enhancements observed. Finally, I'll describe the TRIPLE collaboration program to study parity violation and discuss planned experiments to search for violations of TRI. 23 refs.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Download or read book Parity and Time Reversal Violation in Compound Nuclear States and Related Topics written by Naftali Auerbach and published by . This book was released on 1996 with total page 414 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 1975 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Time Reversal Invariance and Parity Violation in Neutron Reactions written by J. David Bowman and published by World Scientific Publishing Company Incorporated. This book was released on 1994 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tests of Time Reversal Invariance in Neutron Physics written by N. R. Roberson and published by World Scientific Publishing Company. This book was released on 1987 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weak and Electromagnetic Interactions in Nuclei written by Hans Volker Klapdor and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear physics is presently experiencing a thrust towards fundamental phy sics questions. Low-energy experiments help in testing beyond today's stan dard models of particle physics. The search for finite neutrino masses and neutrino oscillations, for proton decay, rare and forbidden muon and pion de cays, for an electric dipole moment of the neutron denote some of the efforts to test today's theories of grand unification (GUTs, SUSYs, Superstrings, ... ) complementary to the search for new particles and symmetries in high-energy experiments. The close connections between the laws of microphysics, astrophysics and cosmology open further perspectives. This concerns, to mention some of them, properties of exotic nuclei and nuclear matter, and star evolution; the neutrino and the dark matter in the universe; relations between grand unification and evolution of the early universe. The International Symposium on Weak and Electromagnetic Interactions in Nuclei (W.E.LN. 1986)' held in Heidelberg 1-5 July 1986, in conjunction with the 600th anniversary of the University of Heidelberg, brought together experts in the fields of nuclear and particle physics, astrophysics and cosmol ogy.
Download or read book The Proceedings of the International Symposium on Nuclear Electro Weak Spectroscopy for Symmetries in Electro Weak Nuclear Processes written by H. Toki and published by World Scientific. This book was released on 2002 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NEWS99 international symposium discusses symmetries in electroweak processes in nuclei. Many phenomena in nuclear and particle physics are related to symmetry. It is known that we are living in a left-handed world as far as the Weak interaction is concerned, but neutrino physics suggests that a right-handed world may also be relevant. Chiral symmetry and its breaking plays an essential role in generating hadron masses. Symmetries related to flavor in the strong interaction like isospin, SU(3) and so on are known to be violated although they play a crucial role for the understanding of phenomena in nuclear and particle physics. The treatment of tiny breaking is of particular importance. Weak and electromagnetic interactions are well established at the fundamental level and can be used to probe the structure of nuclei and hadrons. A wide variety of phenomena in nuclear and particle physics were discussed in NEWS99 with an emphasis on symmetry. Topics ranged from nuclear structure to neutrino properties,,covering highly phenomenological to fundamental fields.
Download or read book Time Reversal Invariance and Parity Violation in Neutron Reactions written by Christopher R. Gould and published by . This book was released on 1994 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectroscopy with Coherent Radiation written by Norman Ramsey and published by World Scientific. This book was released on 1998 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: This invaluable volume contains a biography of Nobel laureate Norman F Ramsey as well as reprints and retrospective commentaries on 56 papers relating to spectroscopy with coherent radiation. The earliest papers describe his work with I I Rabi, developing the then new magnetic resonance method and its uses to measure magnetic moments of the different forms of hydrogen and to discover the deuteron electric quadrupole moment. Later papers include his invention of the method of coherent separated oscillatory fields, the development of the atomic hydrogen maser and the uses of these methods to measure properties of nucleons, nuclei, atoms and molecules and to test parity and time reversal symmetries. Other papers present the first successful theories of nuclear magnetic shielding, NMR chemical shifts, electron-coupled nuclear spin-spin interactions and negative absolute temperatures.
Download or read book Advances in Nuclear Physics written by J.W. Negele and published by Springer Science & Business Media. This book was released on 2005-12-17 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the first half of the 20th Century, low-energy nuclear physics was one of the dominant foci of all of science. Then accelerators prospered and energies rose, leading to an increase of interest in the GeV regime and beyond. The three articles comprising this end-of-century Advances in Nuclear Physics present a fitting and masterful summary of the energy regimes through which nuclear physics has developed and promises to develop in future. One article describes new information about fundamental symmetries found with kV neutrons. Another reviews our progress in understanding nucleon-nucleus scattering up to 1 GeV. The third analyzes dilepton production as a probe for quark-gluon plasmas generated in relativistic heavy-ion collisions.
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectroscopy With Coherent Radiation Selected Papers Of Norman F Ramsey With Commentary written by Norman F Ramsey and published by World Scientific. This book was released on 1998-06-04 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: This invaluable volume contains a biography of Nobel laureate Norman F Ramsey as well as reprints and retrospective commentaries on 56 papers relating to spectroscopy with coherent radiation. The earliest papers describe his work with I I Rabi, developing the then new magnetic resonance method and its uses to measure magnetic moments of the different forms of hydrogen and to discover the deuteron electric quadrupole moment. Later papers include his invention of the method of coherent separated oscillatory fields, the development of the atomic hydrogen maser and the uses of these methods to measure properties of nucleons, nuclei, atoms and molecules and to test parity and time reversal symmetries. Other papers present the first successful theories of nuclear magnetic shielding, NMR chemical shifts, electron-coupled nuclear spin-spin interactions and negative absolute temperatures.
