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PI MINUS INTERACTIONS IN PROPANE NEAR THE SECOND RESONANCE

Thesis/Dissertation ·
OSTI ID:4102344

A 12 in. propane bubble chamber was exposed to pi /sup -/ mesons from the Brookhaven Cosmotron. Pictures at 600 and 770 Mev were analyzed for interactions in H and C. Careful attention was paid to quasi-elastic C contamination in the pi /sup -/ + p differential elastic cross sections. Total cross sections for pi /sup -/ + p yields pi /sup o/+ n, pi /sup +/ + pi /sup -/ + n, pi /s up o/ + pi /sup -/ + p, and pi /sup o/ + pi /sup o/ + n are estimated for the H interactions, normalized to total pi /sup -/ - p and pi / sup -/ - C cross sections from counter experiments. The results are presented. C interactions were tabulated as to prong distribution, and pi /sup -/ - C elastic scattering was compared with predictions of the optical model, using no adjustable parameters. Semi-quantitative pi /sup -/neutron differential scattering cross sections were obtained, giving information about the T - 3/2 state at these energies. The gamma -ray angular distribution from charge exchanges at 460 Mev was analyzed and used to test the forward dispersion relations. A complete phase shift analysis was attempted, including D waves at 600 Mev and F waves at 770 Mev. The results, while not decisive owing to the great number of parameters, are that no single state appears to pass through a resonance at 600 Mev. There is absorption in many states, with strong absorption in S/sub 11/, S/sub 31/, P/sub 11/, D/sub at 600 Mev, and in S/sub 11/ S/sub 31/, P/sub 13/, D/sub 13/ at 770 Mev. (Disser tation Abstr.)

Research Organization:
Originating Research Org. not identified
NSA Number:
NSA-18-009209
OSTI ID:
4102344
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

ABSORPTION
ANGULAR DISTRIBUTION
BUBBLE CHAMBERS
CARBON
COUNTERS
CROSS SECTIONS
D-WAVE
DISPERSION RELATIONS
ELECTRIC CHARGES
ENERGY LEVELS
ENERGY RANGE
F-WAVE
GAMMA RADIATION
HYDROGEN
INTERACTIONS
MEV RANGE
NEUTRONS
NUCLEAR MODELS
OPTICAL MODEL
PARTICLE MODELS
PARTICLE TRACKS
PHASE SHIFT
PHYSICS
PIONS
PIONS-MINUS
PROPANE
PROTONS
QUANTUM MECHANICS
RESONANCE
SCATTERING
STRANGENESS
SYNCHROTRONS
TABLES