NUCLEON AND NUCLEAR CROSS SECTIONS FOR POSITIVE PIONS AND PROTONS ABOVE 1.4 Bev/c (thesis)

Technical Report · Wed Feb 01 04:00:00 EST 1961

OSTI ID:4060128

Longo, M J

Total ( pi /sup +/,p) and (p,p) cross sections in the momentum range from 1.4 to 4.0 Bev/c are presented. These measurements, with an accuracy of approx equal 2%, were made at the Berkeley Bevatron using counter techniques. Pions were distinguished from protons by means of a gas-filled Cerenkov counter. The ( pi /sup +/,p) total cross section was found to be almost constant above 2.0 Bev/c at a value near 29 mb. The (p,p) cross section decreased gradually from 47.5 mb to 41.7 mb over the momentum range covered. Transmission measurements of pi /sup +/-nucleus and p-nucleus cross sections in both good and poor geometry were made at 3.0 Bev/c. The results were compared with the predictions of the optical model and dispersion relations. In contrast to most previous work at high energies, an essentially exact solution of the wave equation for a potential well with a diffuse optical potential that best fit the experimental data were in good agreement with the predicted values. No strong conclusions regarding the real part of the potential are possible. Absorption and total elastic cross sections for Be, C, Al, and Cu are presented. The total elastic cross sections from this experiment disagree with Wikner's for pi /sup -/-nucleus scattering. (auth)

• Research Organization: California. Univ., Berkeley. Lawrence Radiation Lab.
• DOE Contract Number: W-7405-ENG-48
• NSA Number: NSA-15-020152
• OSTI ID: 4060128
• Report Number(s): UCRL-9497
• Country of Publication: United States
• Language: English

Related Subjects

ABSORPTION
ALUMINUM
BERKELEY
BERYLLIUM
BETATRONS
BEVATRON
CARBON
CHERENKOV COUNTERS
COPPER
CROSS SECTIONS
DISPERSION THEORY
ELASTIC SCATTERING
ENERGY RANGE
ERRORS
GASES
MEASURED VALUES
MOMENTUM
NUCLEAR MODELS
NUCLEAR POTENTIAL
NUCLEI
OPTICAL MODEL
PHYSICS
PIONS
PIONS-MINUS
PIONS-PLUS
PROTONS
QUANTUM MECHANICS
SCATTERING
SYNCHROTRONS