{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/90634"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/90634","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Epithermal neutron activation analysis of short-lived radionuclides using a pneumatic transport system and a pulsed D-T neutron generator","abstract":"A pneumatic transport system for the detection and characterization of short-lived (of order 60 s or less) radionuclides produced during irradiation by a D-T neutron generator was constructed. Target samples of indium, palladium, and germanium were irradiated by the neutron generator embedded in a graphite monolith to produce epithermal activation products. The three radioisotopes of interest are palladium-107, palladium-109, and germanium-75. The experimental half-lives of each of the three isotopes, with the specific activity in parenthesis are: 21.82±3.71 (49.36 nCi/g), 279.21±27.80 (158.91 nCi/g), and 48.51±12.58 (504.78 nCi/g) respectively. These experimental half-lives agree with the published half-lives. The Monte Carlo N-Particle (MCNP) radiation transport code was used to model the graphite pile, the pneumatic transport tube, and the neutron generator. This resulted in benchmarking and validation of the experimental results. In order to reach an agreement between the experimental results and MCNP, a modification was required to the neutron absorption reaction rate produced from MCNP using isomeric to ground state ratios to accurately account for the decay mode most common with these short-lived radioisotopes.","abstract_html":"A pneumatic transport system for the detection and characterization of short-lived (of order 60 s or less) radionuclides produced during irradiation by a D-T neutron generator was constructed. Target samples of indium, palladium, and germanium were irradiated by the neutron generator embedded in a graphite monolith to produce epithermal activation products. The three radioisotopes of interest are palladium-107, palladium-109, and germanium-75. The experimental half-lives of each of the three isotopes, with the specific activity in parenthesis are: 21.82±3.71 (49.36 nCi/g), 279.21±27.80 (158.91 nCi/g), and 48.51±12.58 (504.78 nCi/g) respectively. These experimental half-lives agree with the published half-lives. The Monte Carlo N-Particle (MCNP) radiation transport code was used to model the graphite pile, the pneumatic transport tube, and the neutron generator. This resulted in benchmarking and validation of the experimental results. In order to reach an agreement between the experimental results and MCNP, a modification was required to the neutron absorption reaction rate produced from MCNP using isomeric to ground state ratios to accurately account for the decay mode most common with these short-lived radioisotopes.","abstract_has_math":false,"creators":["Kustra, Richard J"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Nuclear, Plasma, Radiolgc Engr","degree_department":null,"school":null,"contributors":["Heuser, Brent J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2016,"date_issued":"2016-07-07T19:57:51Z","date_published":"2016-07-07T19:57:51Z","updated_at":"2026-07-22T22:26:34Z","subjects":["epithermal neutron capture","neutron activation analysis","graphite-uranium subcritical assembly","pneumatic transport system","short-lived radioisotope production","deuterium-tritium neutron generator"],"languages":["en"],"rights":["Copyright 2016 Richard Kustra"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/90634","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Heuser, Brent J."]},{"key":"dc:creator","label":"Author","values":["Kustra, Richard J"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2016-07-07T19:57:51Z","2016-04-27","2016-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Nuclear, Plasma, Radiolgc Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["epithermal neutron capture","neutron activation analysis","graphite-uranium subcritical assembly","pneumatic transport system","short-lived radioisotope production","deuterium-tritium neutron generator"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2016 Richard Kustra"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/90634"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["A pneumatic transport system for the detection and characterization of short-lived (of order 60 s or less) radionuclides produced during irradiation by a D-T neutron generator was constructed. Target samples of indium, palladium, and germanium were irradiated by the neutron generator embedded in a graphite monolith to produce epithermal activation products. The three radioisotopes of interest are palladium-107, palladium-109, and germanium-75. The experimental half-lives of each of the three isotopes, with the specific activity in parenthesis are: 21.82±3.71 (49.36 nCi/g), 279.21±27.80 (158.91 nCi/g), and 48.51±12.58 (504.78 nCi/g) respectively. These experimental half-lives agree with the published half-lives. The Monte Carlo N-Particle (MCNP) radiation transport code was used to model the graphite pile, the pneumatic transport tube, and the neutron generator. This resulted in benchmarking and validation of the experimental results. In order to reach an agreement between the experimental results and MCNP, a modification was required to the neutron absorption reaction rate produced from MCNP using isomeric to ground state ratios to accurately account for the decay mode most common with these short-lived radioisotopes.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2016-07-07 without embargo terms","The student, Richard Kustra, accepted the attached license on 2016-04-24 at 21:26.","The student, Richard Kustra, submitted this Thesis for approval on 2016-04-24 at 21:34.","This Thesis was approved for publication on 2016-04-27 at 09:04.","DSpace SAF Submission Ingestion Package generated from Vireo submission #9455 on 2016-07-07 at 13:32:44","Made available in DSpace on 2016-07-07T19:57:51Z (GMT). No. of bitstreams: 3 KUSTRA-THESIS-2016.pdf: 2053601 bytes, checksum: 536de7ae7c6800cdf0a3df217b819e82 (MD5) Source_Files.zip: 10469322 bytes, checksum: fbe4e9c82c4596413a0fcad82557f924 (MD5) LICENSE.txt: 4211 bytes, checksum: a15e2b1a5ff820cb20e5e04c0fc64d62 (MD5) Previous issue date: 2016-04-27"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Epithermal neutron activation analysis of short-lived radionuclides using a pneumatic transport system and a pulsed D-T neutron generator"]}]}],"canonical_facts":{"dc:contributor":["Heuser, Brent J."],"dc:creator":["Kustra, Richard J"],"dc:date":["2016-07-07T19:57:51Z","2016-04-27","2016-05"],"dc:description":["A pneumatic transport system for the detection and characterization of short-lived (of order 60 s or less) radionuclides produced during irradiation by a D-T neutron generator was constructed. Target samples of indium, palladium, and germanium were irradiated by the neutron generator embedded in a graphite monolith to produce epithermal activation products. The three radioisotopes of interest are palladium-107, palladium-109, and germanium-75. The experimental half-lives of each of the three isotopes, with the specific activity in parenthesis are: 21.82±3.71 (49.36 nCi/g), 279.21±27.80 (158.91 nCi/g), and 48.51±12.58 (504.78 nCi/g) respectively. These experimental half-lives agree with the published half-lives. The Monte Carlo N-Particle (MCNP) radiation transport code was used to model the graphite pile, the pneumatic transport tube, and the neutron generator. This resulted in benchmarking and validation of the experimental results. In order to reach an agreement between the experimental results and MCNP, a modification was required to the neutron absorption reaction rate produced from MCNP using isomeric to ground state ratios to accurately account for the decay mode most common with these short-lived radioisotopes.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2016-07-07 without embargo terms","The student, Richard Kustra, accepted the attached license on 2016-04-24 at 21:26.","The student, Richard Kustra, submitted this Thesis for approval on 2016-04-24 at 21:34.","This Thesis was approved for publication on 2016-04-27 at 09:04.","DSpace SAF Submission Ingestion Package generated from Vireo submission #9455 on 2016-07-07 at 13:32:44","Made available in DSpace on 2016-07-07T19:57:51Z (GMT). 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