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Angular Correlation of Photoproduced Pion Pairs


Elliott, David Duncan (1959) Angular Correlation of Photoproduced Pion Pairs. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/JQ7K-E986.


NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. The angular correlation between the two pions from the reaction [...] has been studied by observing coincidences between two pions produced simultaneously in a hydrogen target in the 1.1 Bev x-ray beam of the Cal Tech synchrotron. The negative pion was detected in a magnetic spectrometer set to accept 150 Mev pions at an angle, [...] 35° with respect to the x-ray beams. The positive pion was detected in a counter telescope which was set at various angles, [...] with respect to the x-ray beam, and at azimuthal angles, [...] with respect to the azimuthal angle of the negative pion, of 0°, 90°, and 180°. For each set of angles the absorbers between the counters of the telescope were chosen such that the observed pairs could be separated into two groups: those produced by photons with energies between 650 and 825 Mev, and those produced by photons with energies from 825 to the bremsstrahlung cut-off energy of 1080 Mev. For pairs produced by photons in the lower energy group the cross section shows no azimuthal dependence in the C. M. system within the statistical error of about [...] at either of the two C. M. zenith angles [...] = 70° and l20°. For a C. M. azimuthal angle of 180° the cross-section appears to be independent of zenith angle, [...] except at the most forward point ([...] = 35°) where the cross-section is about 30% larger than that observed at other angles. The value of the cross section integrated over all [...] directions is consistent with a direct measurement of the cross-section for the production of negative pions.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Physics and Mathematics)
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Minor Option:Mathematics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Sands, Matthew L.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1959
Record Number:CaltechETD:etd-02102006-080252
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:592
Deposited By: Imported from ETD-db
Deposited On:10 Feb 2006
Last Modified:18 Oct 2023 19:01

Thesis Files

PDF (Elliott_dd_1959.pdf) - Final Version
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