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Detectors with high energy resolution, e.g. less than 1.5% resolution at 662\u2009keV at room temperature, are critically important in most uses. The efficacy of adding selenium to the cadmium zinc telluride (CdZnTe) matrix for radiation detector applications has been studied. In this paper, the growth of a new quaternary compound Cd<jats:sub>0.9<\/jats:sub>Zn<jats:sub>0.1<\/jats:sub>Te<jats:sub>0.98<\/jats:sub>Se<jats:sub>0.02<\/jats:sub> by the Traveling Heater Method (THM) is reported. The crystals possess a very high compositional homogeneity with less extended defects, such as secondary phases and sub-grain boundary networks. Virtual Frisch-grid detectors fabricated from as-grown ingots revealed ~0.87\u20131.5% energy resolution for 662-keV gamma rays. The superior material quality with a very low density of defects and very high compositional homogeneity heightens the likelihood that Cd<jats:sub>0.9<\/jats:sub>Zn<jats:sub>0.1<\/jats:sub>Te<jats:sub>0.98<\/jats:sub>Se<jats:sub>0.02<\/jats:sub> will be the next generation room-temperature detector material.<\/jats:p>","DOI":"10.1038\/s41598-019-43778-3","type":"journal-article","created":{"date-parts":[[2019,5,13]],"date-time":"2019-05-13T22:03:33Z","timestamp":1557785013000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":102,"title":["Evaluation of CdZnTeSe as a high-quality gamma-ray spectroscopic material with better compositional homogeneity and reduced defects"],"prefix":"10.1038","volume":"9","author":[{"given":"Utpal N.","family":"Roy","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giuseppe S.","family":"Camarda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yonggang","family":"Cui","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rubi","family":"Gul","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ge","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5085-2100","authenticated-orcid":false,"given":"Jakub","family":"Zazvorka","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vaclav","family":"Dedic","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jan","family":"Franc","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ralph B.","family":"James","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2019,5,13]]},"reference":[{"key":"43778_CR1","doi-asserted-by":"publisher","first-page":"103","DOI":"10.1016\/S0927-796X(01)00027-4","volume":"R 32","author":"TE Schlesinger","year":"2001","unstructured":"Schlesinger, T. 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