{"created":"2021-03-01T06:17:21.710599+00:00","id":812,"links":{},"metadata":{"_buckets":{"deposit":"69426681-5e2b-4231-a0b7-f2c03fbd8bcc"},"_deposit":{"id":"812","owners":[],"pid":{"revision_id":0,"type":"depid","value":"812"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00000812","sets":["75:76:77","9:10:11"]},"item_2_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2007-10","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"16","bibliographicPageStart":"165002-1-4","bibliographicVolumeNumber":"99","bibliographic_titles":[{"bibliographic_title":"Physical review letters"}]}]},"item_2_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"A report is made on a comprehensive observation of a burstlike -ray emission from thunderclouds on the Sea of Japan, during strong thunderstorms on 6 January 2007. The detected emission, lasting for ~40 sec, preceded cloud-to-ground lightning discharges. The burst spectrum, extending to 10 MeV, can be interpreted as consisting of bremsstrahlung photons originating from relativistic electrons. This ground-based observation provides the first clear evidence that strong electric fields in thunderclouds can continuously accelerate electrons beyond 10 MeV prior to lightning discharges.","subitem_description_type":"Abstract"}]},"item_2_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"3144","nameIdentifierScheme":"WEKO"}],"names":[{"name":"土屋, 晴文"}]},{"nameIdentifiers":[{"nameIdentifier":"3145","nameIdentifierScheme":"WEKO"}],"names":[{"name":"榎戸, 輝揚"}]},{"nameIdentifiers":[{"nameIdentifier":"3146","nameIdentifierScheme":"WEKO"}],"names":[{"name":"山田, 真也"}]},{"nameIdentifiers":[{"nameIdentifier":"3147","nameIdentifierScheme":"WEKO"}],"names":[{"name":"湯浅, 孝行"}]},{"nameIdentifiers":[{"nameIdentifier":"3148","nameIdentifierScheme":"WEKO"}],"names":[{"name":"川原田, 円"}]},{"nameIdentifiers":[{"nameIdentifier":"3149","nameIdentifierScheme":"WEKO"}],"names":[{"name":"北口, 貴雄"}]},{"nameIdentifiers":[{"nameIdentifier":"3150","nameIdentifierScheme":"WEKO"}],"names":[{"name":"国分, 紀秀"}]},{"nameIdentifiers":[{"nameIdentifier":"3151","nameIdentifierScheme":"WEKO"}],"names":[{"name":"加藤, 博"}]},{"nameIdentifiers":[{"nameIdentifier":"3152","nameIdentifierScheme":"WEKO"}],"names":[{"name":"岡野, 眞治"}]},{"nameIdentifiers":[{"nameIdentifier":"3153","nameIdentifierScheme":"WEKO"}],"names":[{"name":"中村, 聡史"}]},{"nameIdentifiers":[{"nameIdentifier":"3154","nameIdentifierScheme":"WEKO"}],"names":[{"name":"牧島, 一夫"}]}]},"item_2_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"American Physical 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