{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/71058"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/71058","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Half lives of the levels 829 and 864 keV in ¹¹⁵In measured by delayed coincidence technique and analysed by three different methods","abstract":"An initial study of the delayed coincidence technique and methods of analysis has been made. Three methods of analysis are attempted: the slope, the method of moments and the \"unfolding\" method. Necessary corrections to minimize errors of calculation are proposed and numerical checks of the methods are performed. Half lives of the levels 829 and 864 keV in ¹¹⁵In were separately measured by means of β-γ delayed coincidence technique. A Ge (Li) detector of 4cc active volume, in conjunction with a constant fraction timing discriminator, was used to detect the γ- branch. The data from this experiment were analysed by the above mentioned methods and the proposed corrections were made. Good correspondence was obtained between the unfolding and the method of moments, while the valµe obtained using the slope method was slightly higher. The numerical test of the analysis methods could not explain this difference completely. It was assumed that the difference was due to fluctuations in the collected data.","abstract_html":"An initial study of the delayed coincidence technique and methods of analysis has been made. Three methods of analysis are attempted: the slope, the method of moments and the "unfolding" method. Necessary corrections to minimize errors of calculation are proposed and numerical checks of the methods are performed. Half lives of the levels 829 and 864 keV in ¹¹⁵In were separately measured by means of β-γ delayed coincidence technique. A Ge (Li) detector of 4cc active volume, in conjunction with a constant fraction timing discriminator, was used to detect the γ- branch. The data from this experiment were analysed by the above mentioned methods and the proposed corrections were made. Good correspondence was obtained between the unfolding and the method of moments, while the valµe obtained using the slope method was slightly higher. The numerical test of the analysis methods could not explain this difference completely. It was assumed that the difference was due to fluctuations in the collected data.","abstract_has_math":false,"creators":["Svensson, Lars-Göran"],"institution":"Virginia Polytechnic Institute and State University","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Physics","degree_department":"Physics","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1970,"date_issued":"1970","date_published":"1970","updated_at":"2026-07-22T22:19:37Z","subjects":[],"languages":["en_US"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/71058","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Physics"]},{"key":"dc:creator","label":"Author","values":["Svensson, Lars-Göran"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2016-05-23T14:57:33Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2016-05-23T14:57:33Z"]},{"key":"dc:date.issued","label":"Date","values":["1970"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute and State University"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/71058"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["An initial study of the delayed coincidence technique and methods of analysis has been made. Three methods of analysis are attempted: the slope, the method of moments and the \"unfolding\" method. Necessary corrections to minimize errors of calculation are proposed and numerical checks of the methods are performed. Half lives of the levels 829 and 864 keV in ¹¹⁵In were separately measured by means of β-γ delayed coincidence technique. A Ge (Li) detector of 4cc active volume, in conjunction with a constant fraction timing discriminator, was used to detect the γ- branch. The data from this experiment were analysed by the above mentioned methods and the proposed corrections were made. Good correspondence was obtained between the unfolding and the method of moments, while the valµe obtained using the slope method was slightly higher. The numerical test of the analysis methods could not explain this difference completely. It was assumed that the difference was due to fluctuations in the collected data."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Half lives of the levels 829 and 864 keV in ¹¹⁵In measured by delayed coincidence technique and analysed by three different methods"]}]}],"canonical_facts":{"dc:contributor.department":["Physics"],"dc:creator":["Svensson, Lars-Göran"],"dc:date.accessioned":["2016-05-23T14:57:33Z"],"dc:date.available":["2016-05-23T14:57:33Z"],"dc:date.issued":["1970"],"dc:description.abstract":["An initial study of the delayed coincidence technique and methods of analysis has been made. Three methods of analysis are attempted: the slope, the method of moments and the \"unfolding\" method. Necessary corrections to minimize errors of calculation are proposed and numerical checks of the methods are performed. Half lives of the levels 829 and 864 keV in ¹¹⁵In were separately measured by means of β-γ delayed coincidence technique. A Ge (Li) detector of 4cc active volume, in conjunction with a constant fraction timing discriminator, was used to detect the γ- branch. The data from this experiment were analysed by the above mentioned methods and the proposed corrections were made. Good correspondence was obtained between the unfolding and the method of moments, while the valµe obtained using the slope method was slightly higher. The numerical test of the analysis methods could not explain this difference completely. It was assumed that the difference was due to fluctuations in the collected data."],"dc:description.degree":["Master of Science"],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["http://hdl.handle.net/10919/71058"],"dc:language.iso":["en_US"],"dc:publisher":["Virginia Polytechnic Institute and State University"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["Half lives of the levels 829 and 864 keV in ¹¹⁵In measured by delayed coincidence technique and analysed by three different methods"],"dc:type":["Thesis"],"dc:type.dcmitype":["Text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:19:37Z"}