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$pi$$sup +$-p ELASTIC SCATTERING AT 310 Mev: RECOIL-NUCLEON POLARIZATION

Journal Article · · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
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Recoil-proton polarization in pi /sup +/-p elastic scattering at 310- Mev incident-pion laboratory kinetic energy is 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 plus or minus 0.062 at 114.2 deg, -0.164 plus or minus 0.057 at 124.5 deg, -0.155 plus or minus 0.044 at 133.8 deg, and-0.162 plus or minus 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 p/sub i/ x p/sub t/, where this quantity is the cross product of the initial and final momentum vectors of the conjugate pions. A beam of 1 x 10/sup 6/ pions per sec incident upon a 1.0-g/cm/sup 2/-thick liquidhydrogen 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 of the system at each recoil angle. Values obtained for the analyzing ability range from 0.41 to 0.57. (auth)
Research Organization:
Univ. of California, Berkeley
NSA Number:
NSA-15-017509
OSTI ID:
4032592
Journal Information:
Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 122; ISSN PHRVA
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

BEAMS
CARBON
ENERGY RANGE
ERRORS
HYDROGEN
IRRADIATION
LIQUIDS
MEASURED VALUES
MEV RANGE
PHYSICS
PIONS
PIONS-PLUS
POLARIZATION
PROTONS
RECOILS
SCATTERING
SCINTILLATION COUNTERS
SPIN
TARGETS
VECTORS