{"id":{"repo_id":"purdue-thes","oai_identifier":"oai:docs.lib.purdue.edu:open_access_dissertations-2530"},"canonical_url":"https://search.dev.ndltd.org/etd/purdue-thes/oai:docs.lib.purdue.edu:open_access_dissertations-2530","repository":{"repo_id":"purdue-thes","name":"Purdue University","base_url":"https://docs.lib.purdue.edu/do/oai/"},"display":{"title":"Direct and Indirect Searches for Anomalous Beta Decay","abstract":"We present a treatment of time-varying nuclear transition rates intended to guide future experimental searches, focusing primarily on the concept of ``self--induce decay.'' This investigation stems from a series of recent reports that suggest that the decay rates of several isotopes may have been influenced by solar activity (perhaps by solar neutrinos). A mechanism in which (anti)neutrinos can influence the decay process suggests that a sample of decaying nuclei emitting neutrinos could affect its own rate of decay. Past experiments have searched for this \"self-induced decay\" (SID) effect by measuring deviations from the expected decay rate for highly active samples of varying geometries. Here, we further develop a SID formalism which takes into account the activation process. In the course of the treatment, the observation is made that the SID behavior closely resembles the behavior of rate-related losses due to dead-time, and hence that standard dead-time corrections can result in the removal of possible SID-related behavior.","abstract_html":"We present a treatment of time-varying nuclear transition rates intended to guide future experimental searches, focusing primarily on the concept of ``self--induce decay.'' This investigation stems from a series of recent reports that suggest that the decay rates of several isotopes may have been influenced by solar activity (perhaps by solar neutrinos). A mechanism in which (anti)neutrinos can influence the decay process suggests that a sample of decaying nuclei emitting neutrinos could affect its own rate of decay. Past experiments have searched for this "self-induced decay" (SID) effect by measuring deviations from the expected decay rate for highly active samples of varying geometries. Here, we further develop a SID formalism which takes into account the activation process. In the course of the treatment, the observation is made that the SID behavior closely resembles the behavior of rate-related losses due to dead-time, and hence that standard dead-time corrections can result in the removal of possible SID-related behavior.","abstract_has_math":false,"creators":["Nistor, Jonathan"],"institution":null,"degree_name":"Doctor of Philosophy (PhD)","degree_level":"Dissertation","degree_discipline":"Physics & Astronomy","degree_department":null,"school":null,"contributors":["Ephraim Fischbach","Andrew S. Hirsch","Ken P. Ritchie","Matthew T. Jones"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-01-01T08:00:00Z","date_published":"2015-01-01T08:00:00Z","updated_at":"2026-07-24T03:54:38Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://docs.lib.purdue.edu/open_access_dissertations/1314","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ephraim Fischbach","Andrew S. Hirsch","Ken P. Ritchie","Matthew T. 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This investigation stems from a series of recent reports that suggest that the decay rates of several isotopes may have been influenced by solar activity (perhaps by solar neutrinos). A mechanism in which (anti)neutrinos can influence the decay process suggests that a sample of decaying nuclei emitting neutrinos could affect its own rate of decay. Past experiments have searched for this \"self-induced decay\" (SID) effect by measuring deviations from the expected decay rate for highly active samples of varying geometries. Here, we further develop a SID formalism which takes into account the activation process. In the course of the treatment, the observation is made that the SID behavior closely resembles the behavior of rate-related losses due to dead-time, and hence that standard dead-time corrections can result in the removal of possible SID-related behavior."]},{"key":"dc:title","label":"Title","values":["Direct and Indirect Searches for Anomalous Beta Decay"]}]}],"canonical_facts":{"dc:contributor":["Ephraim Fischbach","Andrew S. Hirsch","Ken P. Ritchie","Matthew T. Jones"],"dc:creator":["Nistor, Jonathan"],"dc:description.abstract":["We present a treatment of time-varying nuclear transition rates intended to guide future experimental searches, focusing primarily on the concept of ``self--induce decay.'' This investigation stems from a series of recent reports that suggest that the decay rates of several isotopes may have been influenced by solar activity (perhaps by solar neutrinos). A mechanism in which (anti)neutrinos can influence the decay process suggests that a sample of decaying nuclei emitting neutrinos could affect its own rate of decay. Past experiments have searched for this \"self-induced decay\" (SID) effect by measuring deviations from the expected decay rate for highly active samples of varying geometries. Here, we further develop a SID formalism which takes into account the activation process. In the course of the treatment, the observation is made that the SID behavior closely resembles the behavior of rate-related losses due to dead-time, and hence that standard dead-time corrections can result in the removal of possible SID-related behavior."],"dc:identifier":["https://docs.lib.purdue.edu/open_access_dissertations/1314"],"dc:title":["Direct and Indirect Searches for Anomalous Beta Decay"],"thesis:degree_discipline":["Physics & Astronomy"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Doctor of Philosophy (PhD)"]},"updated_at":"2026-07-24T03:54:38Z"}