{"created":"2023-05-15T14:53:30.785278+00:00","id":72873,"links":{},"metadata":{"_buckets":{"deposit":"b85f7992-e508-4e62-8cc0-2719b3998bfd"},"_deposit":{"created_by":1,"id":"72873","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"72873"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00072873","sets":["10:28"]},"author_link":["718046","718048","718049","718045","718047"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2018-08-27","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Structural change and degradation of electron-beam irradiated high density polyethylene was investigated by a conventional positron annihilation lifetime spectroscopy (PALS) using 22Na positron source, gel fraction measurement, and micro-FT-IR spectroscopy immediately after the irradiation and after 3 years storage in air. The pick-off annihilation intensity of ortho-positronium (o-Ps) became small by the irradiation and after the storage maybe due to the trapping of positron by radicals/carbonyl groups. On the other hand, o-Ps lifetime did not change by the irradiation and the storage. It suggests that size of nanometer-sized free-volume is not affected by the structural change such as oxidation and cross-linking. ","subitem_description_type":"Abstract"}]},"item_10005_description_6":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"The 13th meeting of the “Ionizing Radiation and Polymers” symposium (IRaP2018)","subitem_description_type":"Other"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"T.Oka"}],"nameIdentifiers":[{"nameIdentifier":"718045","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"N.Nagasawa"}],"nameIdentifiers":[{"nameIdentifier":"718046","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Y.Kino"}],"nameIdentifiers":[{"nameIdentifier":"718047","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"T.Sekine"}],"nameIdentifiers":[{"nameIdentifier":"718048","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"長澤 尚胤","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"718049","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference object","resourceuri":"http://purl.org/coar/resource_type/c_c94f"}]},"item_title":"Long-term Oxidative Degradation of Electron Beam Irradiated High Density Polyethylene Studied by Positron Annihilation Technique","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Long-term Oxidative Degradation of Electron Beam Irradiated High Density Polyethylene Studied by Positron Annihilation Technique"}]},"item_type_id":"10005","owner":"1","path":["28"],"pubdate":{"attribute_name":"公開日","attribute_value":"2018-07-23"},"publish_date":"2018-07-23","publish_status":"0","recid":"72873","relation_version_is_last":true,"title":["Long-term Oxidative Degradation of Electron Beam Irradiated High Density Polyethylene Studied by Positron Annihilation Technique"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T19:35:10.142403+00:00"}