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High Energy Measurement Of The Deuteron Photodisintegration Differential Cross Section
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Book Synopsis High Energy Measurement of the Deuteron Photodisintegration Differential Cross Section by :
Download or read book High Energy Measurement of the Deuteron Photodisintegration Differential Cross Section written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: New measurements of the high energy deuteron photodisintegration differential cross section were made at the Thomas Jefferson National Accelerator Facility in Newport News, Virginia. Two experiments were performed. Experiment E96-003 was performed in experimental Hall C. The measurements were designed to extend the highest energy differential cross section values to 5.5 GeV incident photon energy at forward angles. This builds upon previous high energy measurements in which scaling consistent with the pQCD constituent counting rules was observed at 90 degrees and 70 degrees in the center of mass. From the new measurements, a threshold for the onset of constituent counting rule scaling seems present at transverse momentum approximately 1.3 GeV/c. The second experiment, E99-008, was performed in experimental Hall A. The measurements were designed to explore the angular distribution of the differential cross section at constant energy. The measurements were made symmetric about 90 degrees.
Book Synopsis High Energy Measurements of the Deuteron Photodisintegration Differential Cross Section by : Elaine Carol Schulte
Download or read book High Energy Measurements of the Deuteron Photodisintegration Differential Cross Section written by Elaine Carol Schulte and published by . This book was released on 2002 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the High Energy Two-Body Deuteron Photodisintegration Differential Cross Section by :
Download or read book Measurement of the High Energy Two-Body Deuteron Photodisintegration Differential Cross Section written by and published by . This book was released on 2001 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first measurements of the d(gamma, p)n differential cross section at forward angles and photon energies above 4 GeV were performed at the Thomas Jefferson National Accelerator Facility (JLab). The results indicate evidence of an angular dependent scaling threshold. Results at theta{sub cm} = 37{sup o} are consistent with the constituent counting rules for E{sub gamma}H" 4 GeV, while those at 70{sup o} are consistent with the constituent counting rules for E{sub gamma} H" 1.5 GeV.
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 High Energy Measurements of the Dueteron Photodisintegration Differential Cross Section by :
Download or read book High Energy Measurements of the Dueteron Photodisintegration Differential Cross Section written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of differential cross sections of two-body deuteron photodisintegration at photon energies of 0.8-1.8 GeV. by : Thih-Yuen Tung
Download or read book Measurement of differential cross sections of two-body deuteron photodisintegration at photon energies of 0.8-1.8 GeV. written by Thih-Yuen Tung and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Absolute Measurement of the Photodisintegration Differential Cross Section of the Deuteron by : Brendan David Fox
Download or read book An Absolute Measurement of the Photodisintegration Differential Cross Section of the Deuteron written by Brendan David Fox and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have measured the absolute $rmsp2H(gamma,p)n$ angular distribution using the Illinois LASA detector at the Saskatchewan Accelerator Laboratory's tagged photon facility. Using 40 to 90 MeV photons, we aimed to measure the differential cross section with a statistical precision of typically 5% in angular bins of $3spcirc$ and energy bins of 2 MeV. Although our measurement achieved this goal, the contribution of systematic errors was larger than anticipated and thus compromised the utility of this result. Without these systematic errors, this measurement (when combined with the world data set) would have provided an extensive experimental data set with an accuracy which was better than the scatter between the various theoretical calculations for the interaction. Refinements to the treatment of the interaction would then have been testable. In particular, because the shape of the angular distribution in this energy regime is sensitive to meson exchange currents, it would have been possible to investigate the methods for incorporating these currents into calculations.
Book Synopsis High Energy Photodisintegration of the Deuteron by :
Download or read book High Energy Photodisintegration of the Deuteron written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of both the data base and current model predictions for the observables of the deuteron photodisintegration reaction, [gamma]d[yields] p[sub n] is presented. Recent cross section and polarization measurements at Jefferson Lab are shown and discussed. A few conclusions are attempted.
Book Synopsis Deuteron Photodisintegration at High Energies by : William Spencer Gilbert
Download or read book Deuteron Photodisintegration at High Energies written by William Spencer Gilbert and published by . This book was released on 1952 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photodisintegration of Deuterons at High Energies by : Dwight Robinson Dixon
Download or read book Photodisintegration of Deuterons at High Energies written by Dwight Robinson Dixon and published by . This book was released on 1955 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Absolute Measurement of the Deuteron Photodisintegration of Cross Section, E[gamma] by : Troy Soos
Download or read book An Absolute Measurement of the Deuteron Photodisintegration of Cross Section, E[gamma] written by Troy Soos and published by . This book was released on 1989 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 [gamma]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 [theta]{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.
Book Synopsis ABSOLUTE MEASUREMENT OF THE DIFFERENTIAL CROSS SECTION OF DEUTERON PHOTODISINTEGRATION FROM 63 TO 71 MEV. by : P. T. Debevec
Download or read book ABSOLUTE MEASUREMENT OF THE DIFFERENTIAL CROSS SECTION OF DEUTERON PHOTODISINTEGRATION FROM 63 TO 71 MEV. written by P. T. Debevec and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deuteron Photodisintegration written by and published by . This book was released on 1997 with total page 9 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° and 90°. These results are in good agreement with previous lower energy measurements. The 90° 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 FROM 220 MeV TO 340 MeV. by : Bjorn H. Wiik
Download or read book PHOTODISINTEGRATION OF THE DEUTERON FROM 220 MeV TO 340 MeV. written by Bjorn H. Wiik and published by . This book was released on 1969 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The differential cross-section for the photodisintegration of the deuteron was measured at laboratory photon energies of 222, 254, 302, 342 MeV in CM angle steps of 10 deg between 20 deg CM and 160 deg CM. (Author).
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 Two-body Photodisintegration of the Deuteron Above 1 GeV. by :
Download or read book Two-body Photodisintegration of the Deuteron Above 1 GeV. written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the central issues in nuclear physics is the identification of clear signatures for quarks in nuclei. A guiding principle in this search is to perform experiments with high energy electromagnetic probes of the simplest nucleus, the deuteron, a system which is particularly amenable to theoretical interpretation. It has long been known that the quark counting rules seem to apply for electron elastic scattering from the pion and nucleon. However, the rapid decline in the cross section for electron scattering from the deuteron, a six-quark system, renders an experiment at high momentum transfer unfeasible. Clearly, the dimensional-scaling region is not reached for electron-deuteron elastic scattering as indicated. This led Brodsky and Chertok to analyze these data in terms of the reduced nuclear amplitudes and produce, in effect, scaling at a lower momentum transfer. Presently, this is the only known case where the reduced nuclear amplitude analysis seems to apply. In the present work we abandon elastic electron scattering in favor of an exclusive photoreaction with the deuteron. The simplest process involving a nucleus is the .gamma.d .-->. pn reaction. Here, n = 13 and an s−11 dependence is expected where the quark counting rules are valid. Naively, one would expect that the energy region where the quark counting rules are valid to be most naturally described in terms of a quark or parton basis rather than a nucleon basis, and thereby provide a signature quark effects in nuclei. Hitherto no s−11 dependence has been observed for the data below 1 GeV. As a test of the energy-dependence for the .gamma.d .-->. pn reaction, we have performed the first measurements for this process above 1 GeV.
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