{"id":"https://openalex.org/W2057790977","doi":"https://doi.org/10.1088/0954-3899/25/9/307","title":"Search for an admixture of heavy neutrinos in the beta-decay of241Pu","display_name":"Search for an admixture of heavy neutrinos in the beta-decay of241Pu","publication_year":1999,"publication_date":"1999-09-01","ids":{"openalex":"https://openalex.org/W2057790977","doi":"https://doi.org/10.1088/0954-3899/25/9/307","mag":"2057790977"},"language":"en","primary_location":{"id":"doi:10.1088/0954-3899/25/9/307","doi":"https://doi.org/10.1088/0954-3899/25/9/307","is_oa":true,"landing_page_url":"https://doi.org/10.1088/0954-3899/25/9/307","pdf_url":"https://iopscience.iop.org/article/10.1088/0954-3899/25/9/307/pdf","source":{"id":"https://openalex.org/S78376336","display_name":"Journal of Physics G Nuclear and Particle Physics","issn_l":"0954-3899","issn":["0954-3899","1361-6471"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-2","ki-jl-1","norway-1","poland-100","russia-white-list-1"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Physics G: Nuclear and Particle Physics","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://iopscience.iop.org/article/10.1088/0954-3899/25/9/307/pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5052828133","display_name":"O. Dragoun","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210149327","display_name":"Czech Academy of Sciences, Nuclear Physics Institute","ror":"https://ror.org/04jymbd90","country_code":"CZ","type":"facility","lineage":["https://openalex.org/I202391551","https://openalex.org/I4210149327"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"O Dragoun","raw_affiliation_strings":["Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic","institution_ids":["https://openalex.org/I4210149327"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5065031055","display_name":"Anton\u00edn \u0160palek","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210149327","display_name":"Czech Academy of Sciences, Nuclear Physics Institute","ror":"https://ror.org/04jymbd90","country_code":"CZ","type":"facility","lineage":["https://openalex.org/I202391551","https://openalex.org/I4210149327"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"A Spalek","raw_affiliation_strings":["Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic","institution_ids":["https://openalex.org/I4210149327"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5016566444","display_name":"M. Ry\u0161av\u00fd","orcid":"https://orcid.org/0000-0001-7633-7062","observed_orcids":["https://orcid.org/0000-0001-7633-7062"]},"institutions":[{"id":"https://openalex.org/I4210149327","display_name":"Czech Academy of Sciences, Nuclear Physics Institute","ror":"https://ror.org/04jymbd90","country_code":"CZ","type":"facility","lineage":["https://openalex.org/I202391551","https://openalex.org/I4210149327"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"M Rysav\u00fd","raw_affiliation_strings":["Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic","institution_ids":["https://openalex.org/I4210149327"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108102466","display_name":"A. Koval\u00edk","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I32699454","display_name":"Joint Institute for Nuclear Research","ror":"https://ror.org/044yd9t77","country_code":"RU","type":"facility","lineage":["https://openalex.org/I32699454"]}],"countries":["RU"],"is_corresponding":false,"raw_author_name":"A Koval\u00edk","raw_affiliation_strings":["Laboratory of Nuclear Problems, JINR, RU-141980 Dubna, Russia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Laboratory of Nuclear Problems, JINR, RU-141980 Dubna, Russia","institution_ids":["https://openalex.org/I32699454"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5013173322","display_name":"E. Yakushev","orcid":"https://orcid.org/0000-0001-9113-2858","observed_orcids":["https://orcid.org/0000-0001-9113-2858"]},"institutions":[{"id":"https://openalex.org/I32699454","display_name":"Joint Institute for Nuclear Research","ror":"https://ror.org/044yd9t77","country_code":"RU","type":"facility","lineage":["https://openalex.org/I32699454"]}],"countries":["RU"],"is_corresponding":false,"raw_author_name":"E A Yakushev","raw_affiliation_strings":["Laboratory of Nuclear Problems, JINR, RU-141980 Dubna, Russia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Laboratory of Nuclear Problems, JINR, RU-141980 Dubna, Russia","institution_ids":["https://openalex.org/I32699454"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5081885555","display_name":"Viktor Brabec","orcid":"https://orcid.org/0000-0002-8233-1393","observed_orcids":["https://orcid.org/0000-0002-8233-1393"]},"institutions":[{"id":"https://openalex.org/I4210149327","display_name":"Czech Academy of Sciences, Nuclear Physics Institute","ror":"https://ror.org/04jymbd90","country_code":"CZ","type":"facility","lineage":["https://openalex.org/I202391551","https://openalex.org/I4210149327"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"V Brabec","raw_affiliation_strings":["Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic","institution_ids":["https://openalex.org/I4210149327"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5067634277","display_name":"A.F. Novgorodov","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I32699454","display_name":"Joint Institute for Nuclear Research","ror":"https://ror.org/044yd9t77","country_code":"RU","type":"facility","lineage":["https://openalex.org/I32699454"]}],"countries":["RU"],"is_corresponding":false,"raw_author_name":"A F Novgorodov","raw_affiliation_strings":["Laboratory of Nuclear Problems, JINR, RU-141980 Dubna, Russia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Laboratory of Nuclear Problems, JINR, RU-141980 Dubna, Russia","institution_ids":["https://openalex.org/I32699454"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5036391055","display_name":"N. Dragounov\u00e1","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210149327","display_name":"Czech Academy of Sciences, Nuclear Physics Institute","ror":"https://ror.org/04jymbd90","country_code":"CZ","type":"facility","lineage":["https://openalex.org/I202391551","https://openalex.org/I4210149327"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"N Dragounov\u00e1","raw_affiliation_strings":["Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic","institution_ids":["https://openalex.org/I4210149327"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5039221816","display_name":"J. \u0158\u00edzek","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210149327","display_name":"Czech Academy of Sciences, Nuclear Physics Institute","ror":"https://ror.org/04jymbd90","country_code":"CZ","type":"facility","lineage":["https://openalex.org/I202391551","https://openalex.org/I4210149327"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"J R\u00edzek","raw_affiliation_strings":["Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Nuclear Physics Institute, Acad. Sci. Czech Republic, CZ-250 68 Rez near Prague, Czech Republic","institution_ids":["https://openalex.org/I4210149327"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":3325,"currency":"USD","value_usd":3325},"apc_paid":null,"fwci":1.3954,"has_fulltext":true,"cited_by_count":15,"citation_normalized_percentile":{"value":0.81909327,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"25","issue":"9","first_page":"1839","last_page":"1858"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10921","display_name":"Neutrino Physics Research","score":0.9976000189781189,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10921","display_name":"Neutrino Physics Research","score":0.9976000189781189,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10048","display_name":"Particle physics theoretical and experimental studies","score":0.0012000000569969416,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13414","display_name":"Radioactive Decay and Measurement Techniques","score":0.00039999998989515007,"subfield":{"id":"https://openalex.org/subfields/3108","display_name":"Radiation"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/heavy-neutrinos","display_name":"heavy neutral leptons","score":0.8799999952316284},{"id":"https://openalex.org/keywords/beta-decay","display_name":"beta decay","score":0.8180000185966492},{"id":"https://openalex.org/keywords/plutonium-241","display_name":"plutonium-241","score":0.9890000224113464},{"id":"https://openalex.org/keywords/electron-energy-spectrum","display_name":"electron energy spectrum","score":0.7720000147819519},{"id":"https://openalex.org/keywords/upper-limits","display_name":"upper limits","score":0.5070000290870667},{"id":"https://openalex.org/keywords/neutrino-mass","display_name":"neutrino mass","score":0.6899999976158142},{"id":"https://openalex.org/keywords/electron-energy-loss","display_name":"electron energy loss","score":0.5329999923706055},{"id":"https://openalex.org/keywords/inelastic-electron-collisions","display_name":"inelastic electron collisions","score":0.6579999923706055},{"id":"https://openalex.org/keywords/monte-carlo-simulation","display_name":"Monte Carlo simulation","score":0.671999990940094}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.7947499752044678},{"id":"https://openalex.org/C186453547","wikidata":"https://www.wikidata.org/wiki/Q2126","display_name":"Neutrino","level":2,"score":0.7340993881225586},{"id":"https://openalex.org/C185544564","wikidata":"https://www.wikidata.org/wiki/Q81197","display_name":"Nuclear physics","level":1,"score":0.6495543122291565},{"id":"https://openalex.org/C112286727","wikidata":"https://www.wikidata.org/wiki/Q619699","display_name":"Electron neutrino","level":4,"score":0.5831361413002014},{"id":"https://openalex.org/C46805990","wikidata":"https://www.wikidata.org/wiki/Q306786","display_name":"Beta decay","level":2,"score":0.555239737033844},{"id":"https://openalex.org/C19499675","wikidata":"https://www.wikidata.org/wiki/Q232207","display_name":"Monte Carlo method","level":2,"score":0.5495879650115967},{"id":"https://openalex.org/C147120987","wikidata":"https://www.wikidata.org/wiki/Q2225","display_name":"Electron","level":2,"score":0.5481423139572144},{"id":"https://openalex.org/C4839761","wikidata":"https://www.wikidata.org/wiki/Q212111","display_name":"Spectral line","level":2,"score":0.5382449626922607},{"id":"https://openalex.org/C204323151","wikidata":"https://www.wikidata.org/wiki/Q905424","display_name":"Range (aeronautics)","level":2,"score":0.5355361104011536},{"id":"https://openalex.org/C184779094","wikidata":"https://www.wikidata.org/wiki/Q26383","display_name":"Atomic physics","level":1,"score":0.5321176648139954},{"id":"https://openalex.org/C33390570","wikidata":"https://www.wikidata.org/wiki/Q188463","display_name":"Spectrometer","level":2,"score":0.4793025553226471},{"id":"https://openalex.org/C105066094","wikidata":"https://www.wikidata.org/wiki/Q109910","display_name":"Electron capture","level":3,"score":0.46123528480529785},{"id":"https://openalex.org/C186370098","wikidata":"https://www.wikidata.org/wiki/Q442787","display_name":"Energy (signal processing)","level":2,"score":0.41904813051223755},{"id":"https://openalex.org/C107966497","wikidata":"https://www.wikidata.org/wiki/Q509021","display_name":"Neutrino oscillation","level":3,"score":0.09019279479980469},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.08109715580940247},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1088/0954-3899/25/9/307","doi":"https://doi.org/10.1088/0954-3899/25/9/307","is_oa":true,"landing_page_url":"https://doi.org/10.1088/0954-3899/25/9/307","pdf_url":"https://iopscience.iop.org/article/10.1088/0954-3899/25/9/307/pdf","source":{"id":"https://openalex.org/S78376336","display_name":"Journal of Physics G Nuclear and Particle Physics","issn_l":"0954-3899","issn":["0954-3899","1361-6471"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-2","ki-jl-1","norway-1","poland-100","russia-white-list-1"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Physics G: Nuclear and Particle Physics","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1088/0954-3899/25/9/307","doi":"https://doi.org/10.1088/0954-3899/25/9/307","is_oa":true,"landing_page_url":"https://doi.org/10.1088/0954-3899/25/9/307","pdf_url":"https://iopscience.iop.org/article/10.1088/0954-3899/25/9/307/pdf","source":{"id":"https://openalex.org/S78376336","display_name":"Journal of Physics G Nuclear and Particle Physics","issn_l":"0954-3899","issn":["0954-3899","1361-6471"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-2","ki-jl-1","norway-1","poland-100","russia-white-list-1"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Physics G: Nuclear and Particle Physics","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320321006","display_name":"Grantov\u00e1 Agentura \u010cesk\u00e9 Republiky","ror":"https://ror.org/01pv73b02"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2057790977.pdf","grobid_xml":"https://content.openalex.org/works/W2057790977.grobid-xml"},"referenced_works_count":32,"referenced_works":["https://openalex.org/W1964672500","https://openalex.org/W1968725931","https://openalex.org/W1977428588","https://openalex.org/W1978296416","https://openalex.org/W1983934517","https://openalex.org/W1984229508","https://openalex.org/W1985452071","https://openalex.org/W1991796847","https://openalex.org/W1996275661","https://openalex.org/W1999710245","https://openalex.org/W2005920654","https://openalex.org/W2009026506","https://openalex.org/W2017744634","https://openalex.org/W2023504515","https://openalex.org/W2025979063","https://openalex.org/W2035365031","https://openalex.org/W2042402598","https://openalex.org/W2044354166","https://openalex.org/W2056056037","https://openalex.org/W2059385166","https://openalex.org/W2075143704","https://openalex.org/W2075925685","https://openalex.org/W2075976949","https://openalex.org/W2077173433","https://openalex.org/W2079119074","https://openalex.org/W2082993925","https://openalex.org/W2090132133","https://openalex.org/W2123043354","https://openalex.org/W2154932965","https://openalex.org/W2157270072","https://openalex.org/W3023901102","https://openalex.org/W4232281197"],"related_works":["https://openalex.org/W7015094960","https://openalex.org/W7071420108","https://openalex.org/W2157270072","https://openalex.org/W4414684704","https://openalex.org/W2064645948","https://openalex.org/W2059385166","https://openalex.org/W2054729316","https://openalex.org/W1986749821","https://openalex.org/W2004762998","https://openalex.org/W1985452071"],"abstract_inverted_index":{"The":[0,23,67],"-spectrum":[1],"of":[2,9,38,55,60,73,111],"241":[3],"Pu":[4],"with":[5,30,76],"the":[6,15,48,71,77,100,107],"endpoint":[7],"energy":[8,16,45],"20.8":[10],"keV":[11],"was":[12,87],"measured":[13],"in":[14],"range":[17],"from":[18],"0.2":[19],"to":[20,35,89],"9.2":[21],"keV.":[22],"spectra":[24],"were":[25,51],"recorded":[26],"during":[27],"5700":[28],"h":[29],"an":[31],"electrostatic":[32],"spectrometer":[33],"set":[34],"a":[36],"resolution":[37],"E":[39,41],"/":[40],"=":[42],"0.011.":[43],"Electron":[44],"losses":[46],"within":[47],"radioactive":[49],"source":[50],"treated":[52],"by":[53],"means":[54],"extensive":[56],"Monte":[57],"Carlo":[58],"simulations":[59],"individual":[61],"elastic":[62],"and":[63,82],"inelastic":[64],"electron":[65],"collisions.":[66],"upper":[68],"limit":[69,96],"for":[70,99],"admixture":[72],"hypothetical":[74],"neutrinos":[75],"rest":[78],"masses":[79],"between":[80],"14":[81],"17":[83],"keV/":[84,102],"c":[85,103],"2":[86,104],"derived":[88],"be":[90],"less":[91],"than":[92],"0.40%":[93],"(the":[94],"lowest":[95],"being":[97],"0.10%":[98],"16":[101],"mass)":[105],"at":[106],"95%":[108],"C.L.,":[109],"independently":[110],"any":[112],"free":[113],"phenomenological":[114],"parameter.":[115]},"counts_by_year":[{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":1}],"updated_date":"2026-10-30T12:39:25.321706","created_date":"2016-06-24T00:00:00"}
