{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360021390767137280.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1103/physrevd.108.123013"}},{"identifier":{"@type":"URI","@value":"https://link.aps.org/article/10.1103/PhysRevD.108.123013"}},{"identifier":{"@type":"URI","@value":"http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.123013/fulltext"}},{"identifier":{"@type":"DOI","@value":"10.48550/arxiv.2306.02700"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Background contributions in the electron-tracking Compton camera aboard SMILE-\n<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:math>"}],"description":[{"notation":[{"@value":"The Mega electron volt (MeV) gamma-ray observation is a promising diagnostic tool for observing the universe. However, the sensitivity of MeV gamma-ray telescopes is limited due to peculiar backgrounds, restricting the application of MeV gamma rays for observation. Identification of backgrounds is crucial for designing next-generation telescopes. Therefore, herein, we assessed the background contribution in the electron-tracking Compton camera (ETCC) on board the SMILE- 2+ balloon experiment. This assessment was performed using the Monte Carlo simulation. The results revealed that the background below 400 keV existed due to the atmospheric gamma-ray background, the cosmic-ray/secondary-particle background, and the accidental background. On the other hand, the unresolved background component, which was not likely to be relevant to direct Compton-scattering events in the ETCC, was confirmed above 400 keV. Overall, this study demonstrated that the Compton-kinematics test provides a powerful tool to remove the background and principally improves the signal-to-noise ratio at 400 keV by an order of magnitude."}]},{"notation":[{"@value":"11 pages, 18 figures"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420848647296553728","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"90898454"},{"@type":"NRID","@value":"1000090898454"}],"foaf:name":[{"@value":"Tomonori Ikeda"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021390767137288","@type":"Researcher","foaf:name":[{"@value":"Atsushi Takada"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021390767137282","@type":"Researcher","foaf:name":[{"@value":"Taito Takemura"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021390767137286","@type":"Researcher","foaf:name":[{"@value":"Kei Yoshikawa"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021390767137287","@type":"Researcher","foaf:name":[{"@value":"Yuta Nakamura"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021390767137280","@type":"Researcher","foaf:name":[{"@value":"Ken Onozaka"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021390767137281","@type":"Researcher","foaf:name":[{"@value":"Mitsuru Abe"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021390767137283","@type":"Researcher","foaf:name":[{"@value":"Toru Tanimori"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021390767137290","@type":"Researcher","foaf:name":[{"@value":"Yoshitaka Mizumura"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"24700010"},{"@type":"EISSN","@value":"24700029"}],"prism:publicationName":[{"@value":"Physical Review D"}],"dc:publisher":[{"@value":"American Physical Society 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