Angular distribution of photoneutrons from deuterium
<p>A photon beam of E<sub>γ</sub>max = 125 MeV, produced by the Saskatchewan electron linear accelerator, was used to irradiate a deuteron target. The deuteron target was viewed simultaneously by five neutron detectors located respectively at 30°, 60°:, 90°, 112° and 142° to...
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ndltd-USASK-oai-usask.ca-etd-07182012-0906232013-01-08T16:35:34Z Angular distribution of photoneutrons from deuterium Evwaraye, Andrew Oteku <p>A photon beam of E<sub>γ</sub>max = 125 MeV, produced by the Saskatchewan electron linear accelerator, was used to irradiate a deuteron target. The deuteron target was viewed simultaneously by five neutron detectors located respectively at 30°, 60°:, 90°, 112° and 142° to the incident photon beam.</p> <p>The measured angular distributions were compared with the theoretical calculations using Hamada- Johnston and Boundary Condition Model potentials. The results of this experiment were also compared with previous measurements where they overlap. Good agreement was found between the present measurements and theoretical predictions in the energy region of E<sub>γ</sub>â¤40 MeV. The shape of the angular distributions in this energy region is approximately sin <sup>2</sup>Î as expected.</p> <p>There is no strict agreement between the present measurements and the theoretical predictions at E<sub>γ</sub>â¤55 MeV. Though the non-phenomenological potential, the Boundary Condition model potential, appears to give better predictions of the angular distributions than the Hamada- Johnson potential. The apparent disagreement between the present work and previous experiments at backward angles is interpreted to be due to the large uncertainties in the background subtraction in the forward proton angles, as all previous workers detected in the outgoing protons in the reaction D (γ, p) n. The large isotropic contribution observed is interpreted to be due to tensor forces both in the ground and final states as well as spin-orbit forces in the final state.</p> Rawlins, John A. University of Saskatchewan 2012-07-18 text application/pdf http://library.usask.ca/theses/available/etd-07182012-090623/ http://library.usask.ca/theses/available/etd-07182012-090623/ en unrestricted I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Saskatchewan or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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en |
format |
Others
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<p>A photon beam of E<sub>γ</sub>max = 125 MeV, produced by the Saskatchewan
electron linear accelerator, was used to irradiate a deuteron target.
The deuteron target was viewed simultaneously by five neutron detectors
located respectively at 30°, 60°:, 90°, 112° and 142° to the incident
photon beam.</p>
<p>The measured angular distributions were compared with the
theoretical calculations using Hamada- Johnston and Boundary Condition
Model potentials. The results of this experiment were also compared
with previous measurements where they overlap. Good agreement was
found between the present measurements and theoretical predictions in the
energy region of E<sub>γ</sub>â¤40 MeV. The shape of the angular distributions in
this energy region is approximately sin <sup>2</sup>Î as expected.</p>
<p>There is no strict agreement between the present measurements
and the theoretical predictions at E<sub>γ</sub>â¤55 MeV. Though the non-phenomenological
potential, the Boundary Condition model potential, appears to give better
predictions of the angular distributions than the Hamada- Johnson potential.
The apparent disagreement between the present work and previous
experiments at backward angles is interpreted to be due to the large
uncertainties in the background subtraction in the forward proton angles,
as all previous workers detected in the outgoing protons in the
reaction D (γ, p) n. The large isotropic contribution observed is
interpreted to be due to tensor forces both in the ground and final
states as well as spin-orbit forces in the final state.</p> |
author2 |
Rawlins, John A. |
author_facet |
Rawlins, John A. Evwaraye, Andrew Oteku |
author |
Evwaraye, Andrew Oteku |
spellingShingle |
Evwaraye, Andrew Oteku Angular distribution of photoneutrons from deuterium |
author_sort |
Evwaraye, Andrew Oteku |
title |
Angular distribution of photoneutrons from deuterium |
title_short |
Angular distribution of photoneutrons from deuterium |
title_full |
Angular distribution of photoneutrons from deuterium |
title_fullStr |
Angular distribution of photoneutrons from deuterium |
title_full_unstemmed |
Angular distribution of photoneutrons from deuterium |
title_sort |
angular distribution of photoneutrons from deuterium |
publisher |
University of Saskatchewan |
publishDate |
2012 |
url |
http://library.usask.ca/theses/available/etd-07182012-090623/ |
work_keys_str_mv |
AT evwarayeandrewoteku angulardistributionofphotoneutronsfromdeuterium |
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1716532941648035840 |