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A Model For Pion Absorption In Nuclei
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Book Synopsis A MODEL FOR PION ABSORPTION IN NUCLEI. by :
Download or read book A MODEL FOR PION ABSORPTION IN NUCLEI. written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To describe pion absorption in nuclei, we introduce a model which assumes that the incident pion is absorbed by the row of target nucleons along the beam direction. The momentum distribution of these nucleons after absorbing the pion is assumed to be determined by the phase space. The experimental data on the inclusive proton cross section are well reproduced.
Book Synopsis Pions In Nuclei - Proceedings Of The International Workshop by : M J Vicente-vacas
Download or read book Pions In Nuclei - Proceedings Of The International Workshop written by M J Vicente-vacas and published by World Scientific. This book was released on 1992-03-27 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings reflect the recent experimental and theoretical progress in pion nuclear physics in topics like pionic atoms, pion absorption, charge exchange, (π, 2π), and others involving pions in nuclei using different probes, as electron photons or heavy ions. Related topics on chiral symmetry, low energy πN and (γ, π⁰) and quark degrees of freedom are also addressed.
Book Synopsis Bound Pion Absorption by Nuclei and Nuclear Short-range Correlations by : John Wylie Morris
Download or read book Bound Pion Absorption by Nuclei and Nuclear Short-range Correlations written by John Wylie Morris and published by . This book was released on 1972 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pions and Nuclei by : Torleif Erik Oskar Ericson
Download or read book Pions and Nuclei written by Torleif Erik Oskar Ericson and published by Oxford University Press, USA. This book was released on 1988 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pion plays an outstanding role in nuclear physics as a generator of the nuclear force and as an important part of the nuclear many-body problem. At the same time, pion beams are used as probes to explore the nucleus and its interactions. As pion physics has matured over the years, a rich and diverse variety of phenomena has been uncovered. The aim of this book is to examine the underlying physical picture behind these phenomena in a systematic and coherent way. The authors emphasize the interplay between physical concepts and experimental facts more than the formal tools, which are presented in a series of appendices. The book is directed towards advanced students as well as research workers.
Download or read book Pion Absorption in Nuclei written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Reported here is the first experiment to measure the excitation of discrete final states following the (.pi.−, p) reaction. The Energetic Pion Channel and Spectrometer (EPICS) at the Los Alamos National Laboratory and the High Resolution Pion Channel and Spectrometer (.pi. M1-SUSI) at the Swiss Institute for Nuclear Physics were used for this high resolution study of (.pi./sup + -/, p) reactions. An average energy resolution of 500 KeV and 700 KeV was achieved at EPICS and .pi. M1-SUSI respectively. At EPICS these reactions were measured at T/sub .pi./ = 120 MeV and theta/sub lab/ = 25° on 24Mg, 27Al, 4°Ca and 58Ni; 12C(.pi.−, p) was measured at T/sub .pi./ = 145 MeV. At .pi. M1-SUSI these reactions were measured at T/sub .pi./ = 90 MeV and at theta/sub lab/ = 20° on 23Na and 24Mg. The measurement includes both the differential cross sections and continuum up to an excitation energy of 40 MeV. In 23Na, 24Mg, and 27Al there are peaks in the low excitation region. The shape of the continuum in an excitation energy range of 10 to 40 MeV was found to be independent of pion charge and target mass. The magnitude of proton yield from all the targets at T/sub .pi./ = 120 MeV is more than twenty four times larger for .pi. than for .pi.−. Also, the cross sections for both reactions on 24Mg is slightly enhanced compared to other nuclei. At T/sub .pi./ = 90 MeV the ratio of the proton yield for .pi. to .pi.− absorption drops down to fourteen. This high ratio and its energy dependence supports the idea of a two nucleon pion absorption model. Pion absorption in the context of both the reaction mechanism and nuclear structure is discussed. 99 refs., 64 figs., 11 tabs.
Book Synopsis Evidence for Physics Beyond the Quasi-deuteron Model in Pion Absorption by :
Download or read book Evidence for Physics Beyond the Quasi-deuteron Model in Pion Absorption written by and published by . This book was released on 1991 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cross sections for pion absorption of T{sub {pi}} = 100 MeV on a range of nuclei leading to two or more energetic protons are presented. A large fraction of the total absorption cross section leads to events with large missing energies, presumably to neutrals. A comparison of the fraction of the total absorption cross section which appears to be the result of an undisturbed two-body mechanism with predictions of a simple semi-classical model of the attenuation of protons through final-state interactions leads to the conclusion that most of the absorption cross section on heavy nuclei is not due to a two-body absorption mechanism followed by final-state interactions but must be the result of pion absorption on three or more nucleons.
Book Synopsis Pion Absorption in Nuclei by : C.H.Q. Ingram
Download or read book Pion Absorption in Nuclei written by C.H.Q. Ingram and published by . This book was released on 1992 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiative pion absorption in complex nuclei by : David K. Anderson
Download or read book Radiative pion absorption in complex nuclei written by David K. Anderson and published by . This book was released on 1960 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pion Absorption in Nuclei by : Itamar Navon
Download or read book Pion Absorption in Nuclei written by Itamar Navon and published by . This book was released on 1980 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pion Absorption Processes. [32 to 74 MeV]. by :
Download or read book Pion Absorption Processes. [32 to 74 MeV]. written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Proton and deuteron production from low-energy pion absorption in light nuclei leading to discrete and continuum states were measured. The LEP beam line at LAMPF was used with a stack of 8 intrinsic germanium crystals. The proton energy spectra are in general characterized by a broad bump at an energy approximately corresponding to .pi.d .-->. pp reaction kinematics, suggestive of pion absorption on 2 nucleons. The energy-integrated cross-section for production of deuterons has an angular distribution similar to that for production of protons. The dependence of the total pion absorption cross-section on A is explained using a semi-classical model for pion transport in nuclei. The (.pi.+, p) as well as (.pi.+, d) reactions generally favor transitions involving larger angular momentum transfer to the residual nucleus when states of similar nuclear structure are considered. The low-energy excitation spectra from the (.pi.+, p) reaction are similar to the spectra from (p, d) reaction on 12C and 13C. However, a calculation of the (.pi. =, p) cross-section using the measured (p, d) reaction with the formulation of Wilkin to relate the two reactions is in moderate disagreement with the measured (.pi.+, p) cross-sections. The excitation spectra from the (.pi.+, p) reaction indicte the importance of two-step processes for the reaction. The (.pi.+, d) reaction leading to the ground state of -- residual nucleus has been seen for 7Li, 12C, and 13C targets. The measured cross section for the 12C(.pi.+, d)1°C reaction to the 2+ state is much higher than that for the ground state. For the case of 18O, no counts were seen for excitation energy of
Book Synopsis Pion Absorption in Nuclei by : Chandra Shekhar Mishra
Download or read book Pion Absorption in Nuclei written by Chandra Shekhar Mishra and published by . This book was released on 1987 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiative Pion Absorption in Nuclei by : Reed Augustus Guy
Download or read book Radiative Pion Absorption in Nuclei written by Reed Augustus Guy and published by . This book was released on 1970 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanism of Pion Absorption in Complex Nuclei by :
Download or read book Mechanism of Pion Absorption in Complex Nuclei written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Basic geometrical arguments are used to analyze the A dependence of the total pion absorption cross section, the effective number of nucleons sharing the pion momentum and energy, and the proton yields from .pi./sup +/- and .pi./sup -/-induced reactions. The results are consistent with the pions penetrating some distance through the nuclear volume and annihilating on a pair of nucleons. 3 figures.
Book Synopsis Pion-nucleon Scattering and Pion Production in Nucleon-nucleon and Nucleus-nucleus Collisions by :
Download or read book Pion-nucleon Scattering and Pion Production in Nucleon-nucleon and Nucleus-nucleus Collisions written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Lecture notes are presented on the following: (1) basic aspects of .pi. N interactions (properties of pions and nucleons, SU(3) and SU(6) classification phenomenology of .pi. N scattering ((3.3) resonance; phase shift analysis, and bag model approach to .pi. N); (2) pion production and absorption in the two nucleon system (NN .-->. NN.pi. (isobar model) and .pi.d reversible NN (existence of dibaryon resonances)); (3) pion absorption in complex nuclei (multiparticle aspects and cascade calculations); and (4) pion production with nuclear targets including (a) nucleon-nucleus, (b) nucleus-nucleus (Fermi-averaged 2-body vs thermodynamic models), and (c) .pi pi. interoferometry.
Book Synopsis Pion Absorption in Complex Nuclei by : Ronald L. Weitz
Download or read book Pion Absorption in Complex Nuclei written by Ronald L. Weitz and published by . This book was released on 1982 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pion Absorption in Light Nuclei by : Heinz J. Weyer
Download or read book Pion Absorption in Light Nuclei written by Heinz J. Weyer and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pion Absorption on Nuclei Followed by Deuteron Emission by : Michel Emile Betz
Download or read book Pion Absorption on Nuclei Followed by Deuteron Emission written by Michel Emile Betz and published by . This book was released on 1977 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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