Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Measurements Of Deuteron Photodisintegration Up To 40 Gev
Download Measurements Of Deuteron Photodisintegration Up To 40 Gev full books in PDF, epub, and Kindle. Read online Measurements Of Deuteron Photodisintegration Up To 40 Gev ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Measurements of Deuteron Photodisintegration Up to 4.0 GeV. by :
Download or read book Measurements of Deuteron Photodisintegration Up to 4.0 GeV. written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first measurements of the differential cross section for the d(gamma, p)n reaction up to 4.0 GeV were performed at the Continuous Electron Beam Accelerator Facility (CEBAF) at Thomas Jefferson Laboratory. We report the cross sections at the proton center-of-mass angles of 36{sup o}, 52{sup o}, 69{sup o}, and 89{sup o}. These results are in reasonable agreement with previous measurements at lower energy. The 89{sup o} and 69{sup o} data show constituent-counting-rule behavior up to 4.0 GeV photon energy. The 52{sup o} and 36{sup o} data disagree with the counting-rule behavior.
Book Synopsis High Energy Two-Body Deuteron Photodisintegration by :
Download or read book High Energy Two-Body Deuteron Photodisintegration written by and published by . This book was released on 1999 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The differential cross section for two-body deuteron photodisintegration was measured at photon energies between 0.8 and 4.0 GeV and centerofmass angles [theta]cm =37°, 53°, 70°, and 90° as part of CEBAF experiment E89012. Constituent counting rules predict a scaling of this cross section at asymptotic energies. In previous experiments this scaling has surprisingly been observed at energies between 1.4 and 2.8 GeV at 90°. The results from this experiment are in reasonable agreement with previous measurements at lower energies. The data at 70° and 90° show a constituent counting rule behavior up to 4.0 GeV photon energy. The 37° and 53°g data do not agree with the constituent counting rule prediction. The new data are compared with a variety of theoretical models inspired by quantum chromodynamics (QCD) and traditional hadronic nuclear physics.
Book Synopsis Complete Angular Distribution Measurements of Two-body Deuteron Photodisintegration Between 0.5 and 3 GeV. by :
Download or read book Complete Angular Distribution Measurements of Two-body Deuteron Photodisintegration Between 0.5 and 3 GeV. written by and published by . This book was released on 2004 with total page 1310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nearly complete angular distributions of the two-body deuteron photodisintegration differential cross section have been measured using the CEBAF Large Acceptance Spectrometer detector and the tagged photon beam at the Thomas Jefferson National Accelerator Facility. The data cover photon energies between 0.5 and 3.0 GeV and center-of-mass proton scattering angles 10{sup o}-160{sup o}. The data show a persistent forward-backward angle asymmetry over the explored energy range, and are well described by the nonperturbative quark gluon string model.
Download or read book Deuteron Photodisintegration written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first measurements of the differential cross section from d([gamma], p)n up to 4.0 GeV were performed at the Thomas Jefferson National Accelerator Facility (TJNAF, formerly CEBAF). Bremsstrahlung photons from electron beam impinging on a copper radiator and a liquid deuterium target were employed for this experiment. The experiment was performed in Hall C where the photoprotons at forward angles in the center-of-mass were detected in the High Momentum Spectrometer (HMS) and photoprotons at backward angles were detected in the Short Orbit Spectrometer (SOS). The bremsstrahlung photon energy was reconstructed from the measured proton momentum and angle using the two-body kinematics. We report the cross section results at the proton center-of-mass angles of 37[degree] and 90[degree]. These results are in good agreement with previous lower energy measurements. The 90[degree] data continue to show the constituent-counting-rule behavior up to 4 GeV. The results will be compared with models based on QCD as well as those based on meson-exchange theory.
Book Synopsis Photodisintegration of the Deuteron at High Energy by :
Download or read book Photodisintegration of the Deuteron at High Energy written by and published by . This book was released on 1992 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of the angular distribution for the?d→+pn reaction were performed at SLAC for photon energies between 0.7 and 1.8 GeV (experiment NE8) and between 1.6 and 4.4. GeV (experiment NE17). The final results for experiment NE8 will be presented, but only preliminary results for NE17 will be discussed. The data at?{sub cm} = 90° appear to follow the constituent counting rules. The angular distribution at high photon energies exhibit large values of the cross section at forward angles. There is evidence that the cross section may also be large at backward angles and high energies.
Download or read book Deuteron Photodisintegration written by and published by . This book was released on 1993 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We review existing data for the exclusive reaction [gamma]d → pn at photon energies above ≈ 1 GeV. We compare these data to various models, most notably those which rely on fundamental quark and gluon degrees of freedom. We include a discussion of future plans for related measurements.
Book Synopsis Measurement of Two-body Deuteron Photodisintegration at High Photon Energies and Theta by :
Download or read book Measurement of Two-body Deuteron Photodisintegration at High Photon Energies and Theta written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report preliminary results from a measurement of the process 2H(.gamma., p)n at theta/sub CM/ = 90° and for photon energies between 0.8 and 1.6 GeV. The results are compared to a conventional calculation based on meson-exchange and to models based on sub-nucleonic degrees of freedom. We find strong disagreement with the meson-exchange calculation, and best agreement with simple constituent counting at the highest energies.
Book Synopsis Deuteron Photo-disintegration at Large Energies by :
Download or read book Deuteron Photo-disintegration at Large Energies written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Current proposals at CEBAF include the measurement of cross sections and polarization observables of exclusive photo-reactions such as deuteron photo-disintegration and pion photo-production from nucleons. At issue is the applicability of traditional meson-exchange models versus quark models of these reactions at photon energies of several GeV. Beam energies above 4 GeV at CEBAF could make possible the measurement of these reactions over a kinematic range sufficiently broad to distinguish between the models. Estimates of counting rates for a Hall-C experiment to measure the [gamma]d [yields] pn cross section are presented.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-02 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photodisintegration of the Deuteron in the Medium Energy Range by : Johan Jacob de Swart
Download or read book Photodisintegration of the Deuteron in the Medium Energy Range written by Johan Jacob de Swart and published by . This book was released on 1959 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Deuteron Photodisintegration: Data and Plans by :
Download or read book Deuteron Photodisintegration: Data and Plans written by and published by . This book was released on 1993 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Perspectives in Hadronic Physics by : Sigfrido Boffi
Download or read book Perspectives in Hadronic Physics written by Sigfrido Boffi and published by Springer Science & Business Media. This book was released on 2004-08-20 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the invited and contributed papers presented at the Fourth International Conference on Perspectives in Hadronic Physics and sent to the Editors within the deadline. The Conference was held at the Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy, from May 12th to 16th, 2003, and was attended by about 100 scientists from 20 countries. The series ofConferences on Perspectives on Hadronic Physics takes place every two years since 1997 and follows the seven Workshops on Perspectives in Nuclear Physics at Intermediate Energies, organized every two years at ICTP since 1983. The aim of these Conferences is to discuss the status-of-the-art concerning the experimental and theoretical investigations of hadronic systems, from nucleons to nuclei and dense nuclear matter, in terms of the relevant underlying degrees of freedom. For such a reason the Fourth Conference has been focused on those experimental and theoretical topics which have been in the last few years the object of intensive investigations, viz. the various approaches employed to describe the structure of hadrons in terms of QCD and QCD inspired models, the recent developments in the treatment of the properties and propagations of hadronic states in the medium, the relevant progress done in the solution of the few- and many- hadron problems, the recent results in the experimental investigation of dense hadronic matter and, last but not least, the physics programs of existing Laboratories and the suggested projects for new Facilities.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Precision Measurements of Deuteron Photodisintegration Using Linearly Polarized Photons of 14 and 16 MeV. by : Matthew Allen Blackston
Download or read book Precision Measurements of Deuteron Photodisintegration Using Linearly Polarized Photons of 14 and 16 MeV. written by Matthew Allen Blackston and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A precision measurement of the d(gamma, n)p reaction was performed at the High Intensity gamma-ray Source (HIGS), which is located at the Duke Free Electron Laser Laboratory on the campus of Duke University. The gamma-ray beams were nearly 100% linearly polarized, allowing the angular distributions of both the analyzing power and unpolarized cross section to be measured at 14 and 16 MeV. The photons were incident on a heavy water target and the neutrons from the photodisintegration reaction were detected using the Blowfish detector array, which consists of 88 liquid scintillator detectors with large angular coverage. A transition matrix element (TME) analysis was performed on the data which allowed the amplitudes of the TMEs which contribute to the reaction at these energies to be extracted. This was done by invoking Watson's theorem, which fixes the relative TME phases using the n-p scattering phase shifts, leaving the TME amplitudes as free parameters in fits to the data. The results indicated very good agreement with a recent potential model calculation for the amplitudes of the three electric dipole (E1) p-waves, which account for over 90% of the cross section at these energies. The extracted TME amplitudes were then used to construct the observable which enters into the Gerasimov-Drell-Hearn (GDH) Sum Rule integrand. The results are the first experimental indication of a positive value of the GDH integrand in the region near photodisintegration threshold. A positive value at these energies has been shown by theory to be due to relativistic contributions.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Photodisintegration of the Deuteron by Polarized Photons by : F. F. Liu
Download or read book The Photodisintegration of the Deuteron by Polarized Photons written by F. F. Liu and published by . This book was released on 1964 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The asymmetry in the photodisintegration of the deuteron by polarized photons has been measured between photon energies of 75 and 230 MeV. Measurements are made mostly at 90 degrees in the center of mass system, but limited data at 45 degrees and 135 degrees are also obtained. The data below 140 MeV are compared with current theories. At 90 degrees our results are generally smaller than theoretical calculations. The measured asymmetry changes sign at about 130 MeV and shows a backward peaking at the high energy points. (Author).
Book Synopsis Chiral Dynamics by : Aron M. Bernstein
Download or read book Chiral Dynamics written by Aron M. Bernstein and published by World Scientific. This book was released on 2001 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an authoritative, up to date, overview of the field of chiral dynamics, and also provides an excellent introduction to the field. The workshop is known for the interplay of theory and experiment and as a meeting place for most of the leading researchers in the field. Contents: Theoretical Chiral Dynamics (H Leutwyler); Experimental Chiral Dynamics (A Bernstein); CEBAF at Jefferson Lab, an Overview (B Mecking); Lorentz Invariant Baryon CHPT (T Becher); Sigma-Terms (J Gasser & M Sainio); Theory of Hadronic Atoms (A Rusetsky); Effective Field Theory in Nuclear Physics (M Savage); Nucleon Polarizabilities (B Holstein); Chiral Symmetry in Dense Hadronic Matter (W Weise); The GerasimovOCoDrellOCoHearn Sum Rule (D Drechsel); and other papers. Readership: Researchers, academics and graduate students in nuclear and high energy physics."
