{"id":{"repo_id":"sask","oai_identifier":"oai:harvest.usask.ca:10388/etd-07262012-135139"},"canonical_url":"https://search.dev.ndltd.org/etd/sask/oai:harvest.usask.ca:10388/etd-07262012-135139","repository":{"repo_id":"sask","name":"University of Saskatchewan","base_url":"https://harvest.usask.ca/server/oai/request"},"display":{"title":"Photonuclear reactions near threshold","abstract":"A number of photonuclear reactions have been studied using the University of Saskatchewan betatron as a source of high energy x-rays. The gamma neutron threholds and reaction cross sections have 100% abundance in one stable isotope. These reactions have been studied by observing the emitted neutrons with a boron trifluoride counter in a tank of paraffin. From considerations regarding the shapes of the cross sections curves near threshold, evidence has been obtained which indicates that electric quadupole and magnetic dipole absorption of photons account for a large part of the reation yield, although electric dipole absorption may account for most of the reaction at higher energies.","abstract_html":"A number of photonuclear reactions have been studied using the University of Saskatchewan betatron as a source of high energy x-rays. The gamma neutron threholds and reaction cross sections have 100% abundance in one stable isotope. These reactions have been studied by observing the emitted neutrons with a boron trifluoride counter in a tank of paraffin. From considerations regarding the shapes of the cross sections curves near threshold, evidence has been obtained which indicates that electric quadupole and magnetic dipole absorption of photons account for a large part of the reation yield, although electric dipole absorption may account for most of the reaction at higher energies.","abstract_has_math":false,"creators":["Chidley, Bruce Gordon"],"institution":"University of Saskatchewan","degree_name":"Doctor of Philosophy (Ph.D.)","degree_level":"Doctoral","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":[],"advisors":["Katz, L."],"committee_chairs":[],"committee_members":["Spinks, J.W.T.","Miller, C.E.","Haslam, R.N.H.","Currie, B.W."],"year":1956,"date_issued":"1956-09","date_published":"1956-09","updated_at":"2026-07-24T04:27:06Z","subjects":[],"languages":["en_US"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10388/etd-07262012-135139","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Katz, L."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Spinks, J.W.T.","Miller, C.E.","Haslam, R.N.H.","Currie, B.W."]},{"key":"dc:creator","label":"Author","values":["Chidley, Bruce Gordon"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2012-07-26T13:51:39Z","2013-01-04T04:48:38Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2013-07-27T08:00:00Z","2013-01-04T04:48:38Z"]},{"key":"dc:date.issued","label":"Date","values":["1956-09"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Doctoral"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy (Ph.D.)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Saskatchewan"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10388/etd-07262012-135139"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A number of photonuclear reactions have been studied using the University of Saskatchewan betatron as a source of high energy x-rays. The gamma neutron threholds and reaction cross sections have 100% abundance in one stable isotope. These reactions have been studied by observing the emitted neutrons with a boron trifluoride counter in a tank of paraffin. From considerations regarding the shapes of the cross sections curves near threshold, evidence has been obtained which indicates that electric quadupole and magnetic dipole absorption of photons account for a large part of the reation yield, although electric dipole absorption may account for most of the reaction at higher energies."]},{"key":"dc:title","label":"Title","values":["Photonuclear reactions near threshold"]}]}],"canonical_facts":{"dc:contributor.advisor":["Katz, L."],"dc:contributor.committeemember":["Spinks, J.W.T.","Miller, C.E.","Haslam, R.N.H.","Currie, B.W."],"dc:creator":["Chidley, Bruce Gordon"],"dc:date.accessioned":["2012-07-26T13:51:39Z","2013-01-04T04:48:38Z"],"dc:date.available":["2013-07-27T08:00:00Z","2013-01-04T04:48:38Z"],"dc:date.issued":["1956-09"],"dc:description.abstract":["A number of photonuclear reactions have been studied using the University of Saskatchewan betatron as a source of high energy x-rays. The gamma neutron threholds and reaction cross sections have 100% abundance in one stable isotope. These reactions have been studied by observing the emitted neutrons with a boron trifluoride counter in a tank of paraffin. From considerations regarding the shapes of the cross sections curves near threshold, evidence has been obtained which indicates that electric quadupole and magnetic dipole absorption of photons account for a large part of the reation yield, although electric dipole absorption may account for most of the reaction at higher energies."],"dc:identifier.uri":["https://hdl.handle.net/10388/etd-07262012-135139"],"dc:language.iso":["en_US"],"dc:title":["Photonuclear reactions near threshold"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Doctoral"],"thesis:degree_name":["Doctor of Philosophy (Ph.D.)"],"thesis:institution_name":["University of Saskatchewan"]},"updated_at":"2026-07-24T04:27:06Z"}