POLARIZATION OF RECOIL PROTONS IN PION-PROTON ELASTIC SCATTERING AT 523, 572, AND 689 Mev (thesis)

Technical Report · Mon Mar 18 04:00:00 EST 1963

DOI:https://doi.org/10.2172/4684590· OSTI ID:4684590

Eandi, R. D.

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)

• Research Organization: California Univ., Berkeley, CA (US). Lawrence Radiation Lab.
• DOE Contract Number: W-7405-ENG-48
• NSA Number: NSA-17-024275
• OSTI ID: 4684590
• Report Number(s): UCRL-10629
• Country of Publication: United States
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
BETATRONS
BIBLIOGRAPHY
CARBON
CHERENKOV COUNTERS
CROSS SECTIONS
DETECTION
ENERGY
ENERGY RANGE
ISOSPIN
MEASURED VALUES
NUCLEAR MODELS
PARTICLE MODELS
PHASE SHIFT
PHYSICS
PIONS
PLATES
POLARIZATION
PROTONS
RADIATION SOURCES
RECOILS
RESONANCE
SCATTERING
SCINTILLATION COUNTERS
SPARK CHAMBERS
SPIN
TARGETS
VELOCITY