A measurement of the diffraction scattering of pions and protons from complex nuclei using multiwire proportional counters

This thesis consists of two parts. The first part deals with the development and testing of mu1tiwire proportional counters. The second part involves the use of a proportional counter system in an experiment to study the diffraction scattering of protons and positive pions from various complex nuclei. A good precision experiment is made considerably simpler due to the high resolution characteristic of the mu1tiwire proportional counters. To aid in the readability of the thesis, the first and second sections deal only with the proportional counters while the last two sections concern the experimental motivation, arrangement of the apparatus, and the experimental measurements and conclusions. The differential and total cross sections for 1 Gev/c positive pion and proton scattering from complex nuclei were measured at the Argonne ZGS. The targets used were carbon, aluminum, copper, and lead. A combination of scintillation, Cherenkov, and mu1tiwire proportional counters was used to obtain the data. The total cross sections were calculated from the observed transmissions and are in good agreement with existing data. The differential cross sections were obtained from the proportional counter hodoscope and are the first measurements at high energy for pions. Two optical models are described and compared with the results. Radius parameters are obtained for each nucleus from the slope of the differential cross section and fit to an equation of the form R = r o A 1/3 + C where A is the atomic number. The parameter ro is found to be 1.12 +/- .02 fm and c is .61 +/- .08 fm.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date

2011

Author dc:creator

• Segler, Samuel Louis

Contributors dc:contributor

• Wattenberg, A.

• diffraction scattering
• pions
• protons
• complex nuclei
• multiwire proportional counters

Statement dc:rights

• 1970 Samuel Louis Segler

Language dc:language

en

Identifier

6057997

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/25839