{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:46:24Z","timestamp":1760147184390,"version":"build-2065373602"},"reference-count":28,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2023,1,15]],"date-time":"2023-01-15T00:00:00Z","timestamp":1673740800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Absolute measurement of radiant power in the X-ray region is essential for many applications in astrophysics, spectroscopy, and X-ray diagnostics. Comparison between different measuring methods is an effective way to check their reliability. In the present work, a comparison of X-ray radiant power absolute measurement between a free-air ionization chamber and a cryogenic electrical substitution radiometer was performed at Beijing Synchrotron Radiation Facility. The absolute radiant power obtained by these two methods were mutually compared via a transfer standard detector\u2019s spectral responsivity at a photon energy of 10 keV. The result of the comparison showed that the difference was 0.47%. A conclusion was reached that the free-air ionization chamber and the cryogenic electrical substitution radiometer agreed within the combined relative uncertainty of 3.35%.<\/jats:p>","DOI":"10.3390\/s23021006","type":"journal-article","created":{"date-parts":[[2023,1,16]],"date-time":"2023-01-16T01:31:15Z","timestamp":1673832675000},"page":"1006","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Comparison of X-ray Radiant Power Absolute Measurement between a Free-Air Ionization Chamber and a Cryogenic Electrical Substitution Radiometer"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2374-8260","authenticated-orcid":false,"given":"Fan","family":"Li","sequence":"first","affiliation":[{"name":"Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China"},{"name":"National Institute of Metrology, Beijing 100029, China"}]},{"given":"Yidong","family":"Zhao","sequence":"additional","affiliation":[{"name":"Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Peiwei","family":"Wang","sequence":"additional","affiliation":[{"name":"National Institute of Metrology, Beijing 100029, China"}]},{"given":"Kun","family":"Tang","sequence":"additional","affiliation":[{"name":"Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Lei","family":"Zheng","sequence":"additional","affiliation":[{"name":"Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1415","DOI":"10.1002\/pssb.200945162","article-title":"A quarter-century of metrology using synchrotron radiation by PTB in Berlin","volume":"246","author":"Beckhoff","year":"2009","journal-title":"Phys. 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