SCATTERING OF 310-Mev POSITIVE PIONS BY PROTONS: EXPERIMENTS AND ANALYSIS (thesis)
Technical Report
·
OSTI ID:4829803
The differential cross section for elastic scattering of 310-Mev positive pions on protons was measured at 23 angles between 14 deg and 165 deg in the center-of-mass system. The fractional rms errors were typically 3%. A liquid hydrogen target was bombarded by a beam of 2 x 10/sup 6/ pions/sec. The scattered pions were detected by a counter telescope. The data at small angles clearly showed constructive interference between nuclear and Coulomb interactions. A total cross section of 60.0 plus or minus 1.4 mb was measured by attenuation. These data were combined with data on the polarization of the recoil proton, which were taken simultaneously with the cross-section measurements, and a phase- shift analysts was made. This analysis was hampered by the small angular region covered by the polarization data (114 deg to 145 deg), but even this limited amount of information about the pelarization proved extremely valuable. lt was impossible to obtain an adequate fit to the data in terms of only S- and P-wave phase shifts. However, a very satisfactory fit was obtained when D waves were also included. Moreover, this solution was unique. Only one set of SPD-wave phase shifts agreed with the data. This set was of the Fermi type. When F waves were also included in the analysss, the fit to the data was not improved significantly. However, the errors on the S-, P-, and D-wave phase shifts increased from about 1/2 deg to around 21/2 deg, and additional sets of phase shifts that fit the data arose. The S-, P-, and D-wave phase shifts difiered considerably among the various sets, even though the F-wave phase shifts were quite small. (auth)
- Research Organization:
- California. Univ., Berkeley. Lawrence Radiation Lab.
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-16-019678
- OSTI ID:
- 4829803
- Report Number(s):
- UCRL-10127
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANGULAR DISTRIBUTION
BEAMS
COINCIDENCE METHODS
COUNTERS
CROSS SECTIONS
D-WAVE
ELECTRIC POTENTIAL
ENERGY RANGE
ERRORS
FIELD THEORY
HYDROGEN
INTERACTIONS
IRRADIATION
LIQUIDS
MEASURED VALUES
NUCLEI
P- WAVE
PHASE SHIFT
PHYSICS
PIONS
PIONS-PLUS
POLARIZATION
PROTONS
QUANTUM MECHANICS
RECOILS
S-WAVE
SCATTERING
TARGETS
BEAMS
COINCIDENCE METHODS
COUNTERS
CROSS SECTIONS
D-WAVE
ELECTRIC POTENTIAL
ENERGY RANGE
ERRORS
FIELD THEORY
HYDROGEN
INTERACTIONS
IRRADIATION
LIQUIDS
MEASURED VALUES
NUCLEI
P- WAVE
PHASE SHIFT
PHYSICS
PIONS
PIONS-PLUS
POLARIZATION
PROTONS
QUANTUM MECHANICS
RECOILS
S-WAVE
SCATTERING
TARGETS