![The Recoil Proton Polarization in [pi]-p Elastic Scattering PDF](https://books.google.com/books/content/images/frontcover/HOlfNwAACAAJ?fife=w150-h200)
Author: Colin Jamie SeftorPublisher:
ISBN:
Category :
Languages : en
Pages : 348
Book Description
The Recoil Proton Polarization in [pi]-p Elastic Scattering
![The Recoil Proton Polarization in [pi]-p Elastic Scattering PDF](https://books.google.com/books/content/images/frontcover/HOlfNwAACAAJ?fife=w80-h100)
Author: Colin Jamie SeftorThe Recoil Proton Polarization In. Pi. P Elastic Scattering
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The polarization of the recoil proton for .pi.p and .pi.−p elastic scattering has been measured for various angles at 547 MeV/c and 625 MeV/c by a collaboration involving The George Washington University; the University of California, Los Angeles; and Abilene Christian University. The experiment was performed at the P3 East experimental area of the Los Alamos Meson Physics Facility. Beam intensities varied from 0.4 to 1.0 x 107 .pi.−'s/sec and from 3.0 to 10.0 x 107 .pi./sup +/'s/sec. The beam spot size at the target was 1 cm in the horizontal direction by 2.5 cm in the vertical direction. A liquid-hydrogen target was used in a flask 5.7 cm in diameter and 10 cm high. The scattered pion and recoil proton were detected in coincidence using the Large Acceptance Spectrometer (LAS) to detect and momentum analyze the pions and the JANUS recoil proton polarimeter to detect and measure the polarization of the protons. Results from this experiment are compared with previous measurements of the polarization, with analyzing power data previously taken by this group, and to partial-wave analysis predictions. 12 refs., 53 figs., 18 tabs.
Recoil Proton Polarization in Pi Minus-proton Elastic Scattering at 365 MeV.
Author: Dale Flint DickinsonPublisher:
ISBN:
Category :
Languages : en
Pages : 124
Book Description
Polarization of Recoil Protons in Pion-Proton Elastic Scattering at 523, 572, and 689 Mev (thesis).
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Angular distributions of recoil-proton polarization for elastic scattering of positive and negative pi mesons on protons were measured at 523, 572, and 689 Mev incidentpion kinetic energy. The pion source was an internal target of the Berkeley Bevatron. Polarization measurements were made by observing the azimuthal asymmetry of sample angular distributions of recoil protons that scatter in large carbon-plate spark chambers. The spark chambers proved to be very suitable polarization analyzerdetectors. The spark chambers were triggered by an array of scintillation and Cerenkov counters that identified the particles entering the chambers as recoil protons from elastic pion-proton scattering. Two plausible nonunique sets of phase shifts were obtained by employing: restrictive assumptions related to the higher resonances, available pion-proton total and differential cross sections measured at nearby energies, and the measurements of this experiment. One set is characterized by a J = 3/2, T = 1/2, D-wave resonance; the other set is characterized by a J = 3/2, T = 1/2, P-wave resonance at 600-Mev incidentpion energy. 38 references. (auth).
Polarization of Recoil Protons in Pion-proton Elastic Scattering at 523, 572, and 689 MeV.
Author: Richard Domingo EandiPublisher:
ISBN:
Category : Elastic scattering (Physics).
Languages : en
Pages : 90
Book Description
Recoil-protron Polarization in [pi Symbol]− -p Elastic Scattering at 365 MeV.
![Recoil-protron Polarization in [pi Symbol]− -p Elastic Scattering at 365 MeV. PDF](https://books.google.com/books/content/images/frontcover/3T7fGwAACAAJ?fife=w80-h100)
Author: Dale Flint DickinsonMeasurement of the Recoil Proton Polarization in Elastic - P Scattering at T - 410 and 492 Mev
Author: P. BareyreMeasurement of the Recoil Proton Polarization in Elastic P Scattering at T
Author: P. BareyreN+-p ELASTIC SCATTERING AT 310 Mev
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The recoil-proton polarization in [pi]-p elastic scattering at 310-Mev incident-pion laboratory kinetic energy has been experimentally measured at four scattering angles with scintillation counters. Polarization values obtained, related rms experimental errors, and mean center-of-mass recoil angles are: +0.044 ± 0.062 at 114.2 deg. =0.164 ± 0.057 at 124.5 deg, -0.155 ± 0.044 at 133.8 deg, and -0.162 ± 0.037 at 145.2 deg. The sign of the polarization is defined to be positive when a preponderance of the recoil protons had their spin vectors pointing in the direction of {rvec P}{sub i} x {rvec p}{sub f}, where this quantity is the cross product of the initial and final momentum vectors of the conjugate pions. A beam of 1 x 106 pions per sec incident upon a 1.0-g/cm2-thick liquid-hydrogen target produced the recoil protons, which were then scattered by a carbon target at a mean energy varying with recoil angle from 113 to 141 Mev. The polarization of the recoil protons was analyzed by measuring the asymmetry produced in the carbon scattering. A proton beam of known polarization was used to determine the analyzing ability (measured asymmetry divided by the polarization of the incident protons) of the system at each recoil angle. Values obtained for the analyzing ability range from 0.41 to 0.57.
Author: Warner Hirsch