Differential cross sections for the reaction He4(gamma, p)H3 from 55 to 165 MeV
Stenberg, Charles Gustave
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https://hdl.handle.net/2142/25747
Description
Title
Differential cross sections for the reaction He4(gamma, p)H3 from 55 to 165 MeV
Author(s)
Stenberg, Charles Gustave
Issue Date
1968
Doctoral Committee Chair(s)
Koester, L.J.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
differential cross sections
incident photons
tritons
proton detection system
Language
en
Abstract
Differential cross sections have been measured for the reaction
He4 (y,p)H3 for incident photons of 55 to 165 MeV. Outgoing protons and
tritons from a low temperature He target were detected in coincidence at
three angular settings in the 1aboratqry: (8p ' 8T) = (59.5, 106°), (88.5°,
75°), and (118°, 47.5°). The triton detection system consisted of three
semiconductor detectors followed by a plastic scintillator. The proton
detection system consisted of four plastic scinti11ators and was large
enough to cq11ect all protons correlated with tritons in the triton system.
The pulses from the calibrated detectors were used to identify the particles
and measure their energies. The results show an exponential decrease in
the differential cross sections with increasing gamma ray energy with
possible leveling off at the region of pion threshold. The angular
distribution of the protons is peaked more strongly forward as the energy
increases. A simple calculation relates the differential cross sections
at the, several angles to a common function of the proton or triton
momentum. Results of this calculation are compared with the data.
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