DIFFERENTIAL DISTRIBUTIONS OF NEUTRONS IN INELASTIC $pi$$sup -$-p INTERACTIONS AT 374, 417, AND 454 Mev

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1963

OSTI ID:4012084

Kurz, R J

The inelastic interactions of pi /sup -/ mesons with protons at ied by measuring the differential distributions of final-state neutrons. The pi source was an internal target of the Berkeley 184-in. synchrocyclotron. The time- of-flight distribution of neutral particles was measured at various laboratorysystem angles between 10 and 65 deg . Neutral particles were detected by obseNing the charged products of their interactions in plastic scintillator. Analysis, presuming the principal inelastic reactions to be pi /sup -/p yields pi /sup +/ pi /sup -/n and n/ sup -/p yields spectra into gamma rays, neutrons from the reaction pi /sup -/p yields non, and inelastic neutrons. Calculated values of the neutron-detection efficiency were used in the conversion of the neutron time-of-flight distribution to ncutron differential distributions as a function of energy. A definite deviation from the behavior expected on the basis of a statistical distribution or a simple peripberal collision model was observed in the distributions of the inelastic neutrons. The differential distributions showed a strong preference for neutrons of low c.m. momentum. By integrating the differential distributions, the total cross sections for the two inelastic reactions were obtained. The cross section for the pi pi sup -/n channel was a rapidly rising function of incident pi energy, whereas the cross section for the pi /sup 0/ pi /sup 0/n channel was essentially constant as a function of energy. The total cross section for the processes pi /sup -/p yields neutrals was obtained along with tentative data on the angular distribution of the reaction pi /sup -/p yields pi /sup 0/n. (Dissertation Abstr., 24: No. 8, Feb. 1964) An apparatus for the measurement of polarization and angular distribution of bremsstrahlung from a 32-Mev betatron is described. Results indicate that the polarization degree at the energy limit has a small but still positive value. The measured values are in fair agreement with theoretical results. (Gmelin Inst.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-18-021011
• OSTI ID: 4012084
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
CHARGED PARTICLES
CROSS SECTIONS
CYCLOTRONS
ENERGY RANGE
GAMMA RADIATION
INTERACTIONS
MEASURED VALUES
MEV RANGE
MOMENTUM
NEUTRON DETECTION
NEUTRONS
NUMERICALS
PERIPHERAL COLLISIONS
PHOSPHORS
PHYSICS
PIONS
SPECTRA
STATISTICS
SYNCHROTRONS
TARGETS
TIME OF FLIGHT METHOD
VELOCITY