A measurement of the diffraction scattering of pions and protons from complex nuclei using multiwire proportional counters
Segler, Samuel Louis
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https://hdl.handle.net/2142/25839
Description
Title
A measurement of the diffraction scattering of pions and protons from complex nuclei using multiwire proportional counters
Author(s)
Segler, Samuel Louis
Issue Date
1970
Doctoral Committee Chair(s)
Wattenberg, A.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
diffraction scattering
pions
protons
complex nuclei
multiwire proportional counters
Language
en
Abstract
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.
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