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Photoproduction of neutral pions from protons at center of mass angles of 60 degrees, 90 degrees, and 120 degrees from .6 to 1.2 bev


Diebold, Robert Ernest (1963) Photoproduction of neutral pions from protons at center of mass angles of 60 degrees, 90 degrees, and 120 degrees from .6 to 1.2 bev. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/5MBQ-GV63.


NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document.

Measurements of the differential cross section for the process [...] have been made at three pion center of mass angles: 60°, 90°, and 120°. Values were obtained at intervals of .05 Bev (incident laboratory photon energy, k) from approximately 0.6 to 1.2 Bev.

Most of the data were obtained by detecting only the recoil protons with a large, wedge-shaped, single focusing magnetic spectrometer and associated equipment. For [...] and [...] Bev the [...] decays were also required, the decay photons being detected by a lead glass total absorption counter.

Although the experimental resolution was considerably narrower than that of most of the previous experiments, its averaging effect was still appreciable in certain regions. Using a six parameter fit, the data at each angle were unfolded in an effort to eliminate the effects of resolution and to obtain the true cross sections as a function of energy.

The results compare reasonably well with those of previous experiments once differences in resolution and systematic errors are taken into account. The results did not agree with the predictions of the Peierls resonance model. The positions and widths of the two cross section peaks in this energy region are quite similar to those observed in [...] scattering.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Walker, Robert Lee
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1963
Record Number:CaltechETD:etd-05062005-113056
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1651
Deposited By: Imported from ETD-db
Deposited On:09 May 2005
Last Modified:21 Dec 2019 02:13

Thesis Files

PDF (Diebold_re_1963.pdf) - Final Version
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