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We studied the accumulation characteristics of radiation response signals of monolithic active pixel sensors (MAPSs) based on their response and discrimination ability to gamma (\u03b3) photon or neutron radiation. The radiation status of the radioactive substances was determined by monitoring the accumulation data of radiation responses. As per the results, Am-Be and 252Cf radiation response signals are primarily concentrated in the range of 0\u201370 pixels. Response signals of 60Co and 137Cs \u03b3-ray were concentrated in two regions; there was a peak in the region with a pixel value of less than 50, and a plateau in the region with a pixel value of more than 75. Therefore, the results are able to discriminate between spectra. Furthermore, we designed a radioactivity monitoring system that is able to examine multiple radioactive materials. 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Electron. Detect. Technol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1016\/j.nima.2012.12.043","article-title":"Active Pixel as Dosimetric Device for Interventional Radiology","volume":"720","author":"Servoli","year":"2013","journal-title":"Nucl. Instrum. Methods Phys. Res. A Accel. Spectrom. Detect. Assoc. Equip."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1070","DOI":"10.1109\/TIM.2015.2476279","article-title":"Experimental Characterization of a Wireless Personal Sensor Node for the Dosimetry During Interventional Radiology Procedures","volume":"65","author":"Magalotti","year":"2016","journal-title":"IEEE Trans. Instrum. Meas."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"2002","DOI":"10.1109\/TIM.2016.2534661","article-title":"Experimental Characterization of a Personal Wireless Sensor Network for the Medical X-ray Dosimetry","volume":"65","author":"Magalotti","year":"2016","journal-title":"IEEE Trans. Instrum. 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Proceedings of the International Conference on Applications in Electronics Pervading Industry, Environment and Society, Rome, Italy.","DOI":"10.1007\/978-3-319-47913-2_1"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"4","DOI":"10.1007\/s41365-017-0344-2","article-title":"Remote Measurement of Low-Energy Radiation Based on ARM Board and ZigBee Wireless Communication","volume":"29","author":"Wang","year":"2018","journal-title":"Nucl. Sci. Tech."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"34913","DOI":"10.1364\/OE.437580","article-title":"Low Dose Rate \u03b3-ray Detection Using a MAPS Camera Under a Neutron Radiation Environment","volume":"29","author":"Xu","year":"2021","journal-title":"Opt. Express"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1920","DOI":"10.1088\/1361-6560\/aa5bc9","article-title":"Real-Time Detection of Fast and Thermal Neutrons in Radiotherapy with CMOS Sensors","volume":"62","author":"Arbor","year":"2017","journal-title":"Phys. Med. Biol."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"125222","DOI":"10.1063\/1.4999664","article-title":"Theoretical and Experimental Study of the Dark Signal in CMOS Image Sensors Affected by Neutron Radiation from a Nuclear Reactor","volume":"7","author":"Xue","year":"2017","journal-title":"AIP Adv."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1016\/j.nima.2016.04.072","article-title":"Particle Detection and Classification Using Commercial off the Shelf CMOS Image Sensors","volume":"827","author":"Lipovetzky","year":"2016","journal-title":"Nucl. Instrum. Methods Phys. Res. A Accel. Spectrom. Detect. Assoc. Equip."},{"key":"ref_14","first-page":"1278","article-title":"Direct Application of CMOS in Radiation Distribution and Exposure Rate Detection","volume":"33","author":"Wang","year":"2013","journal-title":"Nucl. Electron. Detect. Technol."},{"key":"ref_15","first-page":"060401","article-title":"Obtaining Low Energy \u03b3 Dose with CMOS Sensors","volume":"25","author":"Wang","year":"2014","journal-title":"Nucl. Sci. Tech."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"P\u00e9rez, M., Haro, M.S., Sidelnik, I., Tozzi, L., Brito, D.R., Mora, C., Blostein, J.J., Berisso, M.G., and Lipovetzky, J. (2015, January 30\u201331). Commercial CMOS Pixel Array for Beta and Gamma Radiation Particle Counting. Proceedings of the Argentine School of Micro-Nanoelectronics, Villa Maria, Argentina.","DOI":"10.1109\/EAMTA.2015.7237371"},{"key":"ref_17","first-page":"175","article-title":"Nuclear Radiation Detection Based on Un-covered CMOS Camera under Static Scene","volume":"51","author":"Wei","year":"2017","journal-title":"At. Energy Sci. Technol."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"4383","DOI":"10.1088\/0031-9155\/60\/11\/4383","article-title":"Photon Small-Field Measurements with a CMOS Active Pixel Sensor","volume":"60","author":"Spang","year":"2015","journal-title":"Phys. Med. Biol."},{"key":"ref_19","first-page":"77108","article-title":"Characterization of Total Ionizing Dose Damage in COTS Pinned Photodiode CMOS Image Sensors","volume":"6","author":"Wang","year":"2016","journal-title":"AIP Adv."},{"key":"ref_20","unstructured":"(2022, February 10). IMX222LQJ Datasheet, SONY. Available online: https:\/\/html.alldatasheetcn.com\/html-pdf\/1132800\/SONY\/IMX222LQJ\/233\/2\/IMX222LQJ.html."},{"key":"ref_21","unstructured":"(2011, October 18). A5s30A Datasheet, Ambarella. Available online: https:\/\/wenku.baidu.com\/view\/63d1f66a52ea551811a68731.html."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/10\/3919\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T23:16:23Z","timestamp":1760138183000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/10\/3919"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,5,22]]},"references-count":21,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2022,5]]}},"alternative-id":["s22103919"],"URL":"https:\/\/doi.org\/10.3390\/s22103919","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,5,22]]}}}