Speciation of uranium and doping induced defects in Gd_1.98U_0.02Zr₂O₇: Photoluminescence, X-ray photoelectron and positron annihilation lifetime spectroscopy

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• 作者：Santosh K. Gupta^a ; ^{santufrnd@gmail.com} ; ^{santoshg@barc.gov.in} ; C. Reghukumar^b ; Nimai Pathak^a ; K. Sudarshan^a ; D. Tyagi^c ; M. Mohapatra^a ; P.K. Pujari^a ; R.M. Kadam^a
• 刊名：Chemical Physics Letters
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：669
• 期：Complete
• 页码：245-250
• 全文大小：1313 K
• 卷排序：669

文摘

Speciation of uranium in gadolinium zirconate. Uranium stabilizes as U(IV) as well as U(VI). U(VI) stabilizes as UO66− ion in Gd2Zr2O7. XPS also confirms the presence of U in +6/+4 state but quantification is not possible. Positron lifetime indicated formation of antisite defects.