{"id":"https://openalex.org/W2013636873","doi":"https://doi.org/10.1103/physreva.52.258","title":"Thermalization of free positronium atoms by collisions with silica-powder grains, aerogel grains, and gas molecules","display_name":"Thermalization of free positronium atoms by collisions with silica-powder grains, aerogel grains, and gas molecules","publication_year":1995,"publication_date":"1995-07-01","ids":{"openalex":"https://openalex.org/W2013636873","doi":"https://doi.org/10.1103/physreva.52.258","mag":"2013636873","pmid":"https://pubmed.ncbi.nlm.nih.gov/9912243"},"language":"en","primary_location":{"id":"doi:10.1103/physreva.52.258","doi":"https://doi.org/10.1103/physreva.52.258","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physreva.52.258","pdf_url":null,"source":{"id":"https://openalex.org/S164566984","display_name":"Physical Review A","issn_l":"0556-2791","issn":["0556-2791","1050-2947","1094-1622","1538-4446","2469-9926","2469-9934","2469-9942"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","jufo-2","ki-jl-1","norway-2","poland-100","poland-70","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review A","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","pubmed"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5031244453","display_name":"Y. Nagashima","orcid":"https://orcid.org/0000-0003-1521-1815","observed_orcids":["https://orcid.org/0000-0003-1521-1815"]},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Y. Nagashima","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":null,"display_name":"M. Kakimoto","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"M. Kakimoto","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5014821235","display_name":"Toshio Hyodo","orcid":"https://orcid.org/0000-0002-1810-732X","observed_orcids":["https://orcid.org/0000-0002-1810-732X"]},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"T. Hyodo","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5021896064","display_name":"K. Fujiwara","orcid":"https://orcid.org/0000-0002-4098-2606","observed_orcids":["https://orcid.org/0000-0002-4098-2606"]},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"K. Fujiwara","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":null,"display_name":"A. Ichimura","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210136277","display_name":"Institute of Space and Astronautical Science","ror":"https://ror.org/034gcgw60","country_code":"JP","type":"facility","lineage":["https://openalex.org/I2800865746","https://openalex.org/I4210136277"]},{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"A. Ichimura","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan","institution_ids":["https://openalex.org/I4210136277"]}]},{"author_position":"middle","author":{"id":null,"display_name":"T. Chang","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210137180","display_name":"Institute of High Energy Physics","ror":"https://ror.org/03v8tnc06","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210137180"]},{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["CN","JP"],"is_corresponding":false,"raw_author_name":"T. Chang","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","Institute of High Energy Physics , Academia Sinica , P.O. Box 2732, Beijing, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"Institute of High Energy Physics , Academia Sinica , P.O. Box 2732, Beijing, China","institution_ids":["https://openalex.org/I4210137180"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5112080009","display_name":"Jianhua Deng","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210137180","display_name":"Institute of High Energy Physics","ror":"https://ror.org/03v8tnc06","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210137180"]},{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["CN","JP"],"is_corresponding":false,"raw_author_name":"J. Deng","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","Institute of High Energy Physics , Academia Sinica , P.O. Box 2732, Beijing, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"Institute of High Energy Physics , Academia Sinica , P.O. Box 2732, Beijing, China","institution_ids":["https://openalex.org/I4210137180"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5023807824","display_name":"Takashi Akahane","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I205401836","display_name":"National Institute for Materials Science","ror":"https://ror.org/026v1ze26","country_code":"JP","type":"facility","lineage":["https://openalex.org/I205401836"]},{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"T. Akahane","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","National Institute for Research in Inorganic Materials, Namiki, Tsukuba, Ibaraki 305, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"National Institute for Research in Inorganic Materials, Namiki, Tsukuba, Ibaraki 305, Japan","institution_ids":["https://openalex.org/I205401836"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109193572","display_name":"Toshinobu Chiba","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I205401836","display_name":"National Institute for Materials Science","ror":"https://ror.org/026v1ze26","country_code":"JP","type":"facility","lineage":["https://openalex.org/I205401836"]},{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"T. Chiba","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","National Institute for Research in Inorganic Materials, Namiki, Tsukuba, Ibaraki 305, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"National Institute for Research in Inorganic Materials, Namiki, Tsukuba, Ibaraki 305, Japan","institution_ids":["https://openalex.org/I205401836"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5088495783","display_name":"K. Suzuki","orcid":"https://orcid.org/0000-0002-8659-6786","observed_orcids":["https://orcid.org/0000-0002-8659-6786"]},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"K. Suzuki","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","Institute for Solid State Physics, University of Tokyo, 7-22-1 Roppongi, Minato-ku Tokyo 106, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"Institute for Solid State Physics, University of Tokyo, 7-22-1 Roppongi, Minato-ku Tokyo 106, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5113736432","display_name":"B.T.A. McKee","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I204722609","display_name":"Queen's University","ror":"https://ror.org/02y72wh86","country_code":"CA","type":"education","lineage":["https://openalex.org/I204722609"]},{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["CA","JP"],"is_corresponding":false,"raw_author_name":"B. T. A. McKee","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","Department of Physics,#N#Queen's University, Kingston, Ontario, Canada K7L 3N6"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"Department of Physics,#N#Queen's University, Kingston, Ontario, Canada K7L 3N6","institution_ids":["https://openalex.org/I204722609"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5103488681","display_name":"A. T. Stewart","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I204722609","display_name":"Queen's University","ror":"https://ror.org/02y72wh86","country_code":"CA","type":"education","lineage":["https://openalex.org/I204722609"]},{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["CA","JP"],"is_corresponding":false,"raw_author_name":"A. T. Stewart","raw_affiliation_strings":["Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","Department of Physics,#N#Queen's University, Kingston, Ontario, Canada K7L 3N6"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Physics, College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"Department of Physics,#N#Queen's University, Kingston, Ontario, Canada K7L 3N6","institution_ids":["https://openalex.org/I204722609"]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":5,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":2675,"currency":"USD","value_usd":2675},"apc_paid":null,"fwci":1.4812,"has_fulltext":false,"cited_by_count":103,"citation_normalized_percentile":{"value":0.80589194,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":98},"biblio":{"volume":"52","issue":"1","first_page":"258","last_page":"265"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12579","display_name":"Muon and positron interactions and applications","score":0.9984999895095825,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter 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/T12579","display_name":"Muon and positron interactions and applications","score":0.9984999895095825,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter 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/T10523","display_name":"Atomic and Molecular Physics","score":0.0010999999940395355,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"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/T11012","display_name":"Gas Dynamics and Kinetic Theory","score":0.0,"subfield":{"id":"https://openalex.org/subfields/2604","display_name":"Applied Mathematics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/positronium","display_name":"positronium","score":0.7570000290870667},{"id":"https://openalex.org/keywords/thermalization","display_name":"thermalization","score":0.9679999947547913},{"id":"https://openalex.org/keywords/angular-correlation-of-annihilation-radiation","display_name":"angular correlation of annihilation radiation","score":0.8149999976158142},{"id":"https://openalex.org/keywords/silica-aerogel","display_name":"silica aerogel","score":0.8379999995231628},{"id":"https://openalex.org/keywords/momentum-transfer-cross-sections","display_name":"momentum transfer cross sections","score":0.6060000061988831},{"id":"https://openalex.org/keywords/para-positronium","display_name":"para-positronium","score":0.878000020980835},{"id":"https://openalex.org/keywords/ortho-positronium","display_name":"ortho-positronium","score":0.968999981880188},{"id":"https://openalex.org/keywords/momentum-distribution","display_name":"momentum distribution","score":0.5080000162124634}],"concepts":[{"id":"https://openalex.org/C154726568","wikidata":"https://www.wikidata.org/wiki/Q624990","display_name":"Positronium","level":4,"score":0.8927304744720459},{"id":"https://openalex.org/C2780012831","wikidata":"https://www.wikidata.org/wiki/Q381490","display_name":"Aerogel","level":2,"score":0.8408958911895752},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.7900573015213013},{"id":"https://openalex.org/C184779094","wikidata":"https://www.wikidata.org/wiki/Q26383","display_name":"Atomic physics","level":1,"score":0.6869199872016907},{"id":"https://openalex.org/C15359245","wikidata":"https://www.wikidata.org/wiki/Q1347805","display_name":"Thermalisation","level":2,"score":0.6664143204689026},{"id":"https://openalex.org/C32909587","wikidata":"https://www.wikidata.org/wiki/Q11369","display_name":"Molecule","level":2,"score":0.5915497541427612},{"id":"https://openalex.org/C135889238","wikidata":"https://www.wikidata.org/wiki/Q46276","display_name":"Kinetic energy","level":2,"score":0.5284849405288696},{"id":"https://openalex.org/C63385615","wikidata":"https://www.wikidata.org/wiki/Q2869600","display_name":"Atoms in molecules","level":3,"score":0.49363696575164795},{"id":"https://openalex.org/C201941533","wikidata":"https://www.wikidata.org/wiki/Q188721","display_name":"Annihilation","level":2,"score":0.47607913613319397},{"id":"https://openalex.org/C60718061","wikidata":"https://www.wikidata.org/wiki/Q1414747","display_name":"Momentum (technical analysis)","level":2,"score":0.43680644035339355},{"id":"https://openalex.org/C41999313","wikidata":"https://www.wikidata.org/wiki/Q489328","display_name":"Molecular physics","level":1,"score":0.3311518728733063},{"id":"https://openalex.org/C185544564","wikidata":"https://www.wikidata.org/wiki/Q81197","display_name":"Nuclear physics","level":1,"score":0.2793768644332886},{"id":"https://openalex.org/C147120987","wikidata":"https://www.wikidata.org/wiki/Q2225","display_name":"Electron","level":2,"score":0.2587329149246216},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.16550061106681824},{"id":"https://openalex.org/C202100949","wikidata":"https://www.wikidata.org/wiki/Q3229","display_name":"Positron","level":3,"score":0.16490086913108826},{"id":"https://openalex.org/C171250308","wikidata":"https://www.wikidata.org/wiki/Q11468","display_name":"Nanotechnology","level":1,"score":0.12527453899383545},{"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/C10138342","wikidata":"https://www.wikidata.org/wiki/Q43015","display_name":"Finance","level":1,"score":0.0},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1103/physreva.52.258","doi":"https://doi.org/10.1103/physreva.52.258","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physreva.52.258","pdf_url":null,"source":{"id":"https://openalex.org/S164566984","display_name":"Physical Review A","issn_l":"0556-2791","issn":["0556-2791","1050-2947","1094-1622","1538-4446","2469-9926","2469-9934","2469-9942"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","jufo-2","ki-jl-1","norway-2","poland-100","poland-70","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review A","raw_type":"journal-article"},{"id":"pmid:9912243","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/9912243","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical review. A, Atomic, molecular, and optical physics","raw_type":"Journal Article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":41,"referenced_works":["https://openalex.org/W136635400","https://openalex.org/W1638352144","https://openalex.org/W1965079497","https://openalex.org/W1966711824","https://openalex.org/W1967516432","https://openalex.org/W1977492329","https://openalex.org/W1979717808","https://openalex.org/W1986537927","https://openalex.org/W2003659193","https://openalex.org/W2006094575","https://openalex.org/W2009302977","https://openalex.org/W2013025009","https://openalex.org/W2014474562","https://openalex.org/W2016973673","https://openalex.org/W2019587335","https://openalex.org/W2024500140","https://openalex.org/W2027170693","https://openalex.org/W2033008263","https://openalex.org/W2033025294","https://openalex.org/W2033549751","https://openalex.org/W2038869463","https://openalex.org/W2045300337","https://openalex.org/W2045961014","https://openalex.org/W2046555043","https://openalex.org/W2056350726","https://openalex.org/W2061686785","https://openalex.org/W2063410980","https://openalex.org/W2063810911","https://openalex.org/W2070495831","https://openalex.org/W2080219299","https://openalex.org/W2084845764","https://openalex.org/W2085660264","https://openalex.org/W2110403031","https://openalex.org/W2159963780","https://openalex.org/W2319594288","https://openalex.org/W2320778985","https://openalex.org/W3119874680","https://openalex.org/W4211057283","https://openalex.org/W4230797152","https://openalex.org/W4246356182","https://openalex.org/W4248485469"],"related_works":["https://openalex.org/W2044292294","https://openalex.org/W2138775912","https://openalex.org/W2069619933","https://openalex.org/W1988131457","https://openalex.org/W2038394839","https://openalex.org/W1020933379","https://openalex.org/W2528293687","https://openalex.org/W2024500140","https://openalex.org/W7024993779","https://openalex.org/W2471274022"],"abstract_inverted_index":{"Angular":[0],"correlation":[1],"of":[2,22,50,65,79,87,98,140,147,151],"annihilation":[3],"radiation":[4],"(ACAR)":[5],"from":[6,96],"silica-powder":[7],"pellets":[8,39],"and":[9,32,40,67,111,119,149],"silica":[10,30,59],"aerogel":[11,42,99],"has":[12],"been":[13],"measured":[14],"in":[15,43,53],"order":[16],"to":[17,136],"investigate":[18],"the":[19,38,41,47,54,58,63,70,74,92,113,120,129,137,141,145,152],"slowing":[20,48,84],"down":[21,49,85],"free":[23,55],"positronium":[24],"(Ps)":[25],"atoms":[26],"by":[27],"collisions":[28,66],"with":[29,101],"grains":[31,60],"gas":[33,121,142],"molecules.":[34],"The":[35,76],"data":[36,94],"for":[37],"vacuum":[44],"show":[45],"that":[46,128],"parapositronium":[51],"(p-Ps)":[52],"space":[56],"between":[57,73,117],"depends":[61],"on":[62,69],"number":[64],"hence":[68],"mean":[71],"distance":[72],"grains.":[75],"momentum":[77],"distribution":[78],"orthopositronium":[80],"(o-Ps)":[81],"shows":[82],"further":[83],"because":[86],"its":[88],"long":[89],"lifetime.":[90],"From":[91],"ACAR":[93],"obtained":[95],"specimens":[97],"filled":[100],"gases":[102],"(He,":[103],"Ne,":[104],"Ar,":[105],"Kr,":[106],"Xe,":[107],"${\\mathrm{H}}_{2}$,":[108],"${\\mathrm{CH}}_{4}$,":[109],"${\\mathrm{CO}}_{2}$,":[110],"iso-${\\mathrm{C}}_{4}$${\\mathrm{H}}_{10}$),":[112],"momentum-transfer":[114],"cross":[115],"sections":[116],"Ps":[118,130],"molecules":[122,153],"are":[123,154],"estimated.":[124],"It":[125],"is":[126,133],"concluded":[127],"kinetic":[131],"energy":[132],"transferred":[134],"only":[135],"translational":[138],"motion":[139],"molecules,":[143],"i.e.,":[144],"excitations":[146],"vibration":[148],"rotation":[150],"negligible.":[155]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":3},{"year":2022,"cited_by_count":5},{"year":2021,"cited_by_count":4},{"year":2020,"cited_by_count":5},{"year":2019,"cited_by_count":2},{"year":2018,"cited_by_count":6},{"year":2017,"cited_by_count":2},{"year":2016,"cited_by_count":5},{"year":2015,"cited_by_count":6},{"year":2014,"cited_by_count":4},{"year":2013,"cited_by_count":5},{"year":2012,"cited_by_count":3}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}
