Diffuse reflectance spectroscopy of tetravalent neptunium and plutonium ions in ThO2

被引：11

作者：

Zhang, Yingjie ^{[1
]}

Vance, Eric R. ^{[1
]}

机构：

[1] Australian Nucl Sci & Technol Org, Inst Mat Sci & Engn, Menai, NSW 2234, Australia

来源：

JOURNAL OF NUCLEAR MATERIALS | 2008年 / 374卷 / 1-2期

关键词：

D O I：

10.1016/j.jnucmat.2007.07.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Near infrared (4000-12000 cm(-1)) absorption spectra of Pu4+ and Np4+ dilutely incorporated in air-fired polycrystalline ThO2 were collected at ambient temperature and showed several well-defined absorption bands having widths of a few hundred cm(-1). These bands are ascribed to f-f single-ion electronic transitions and increase in intensity with Np and Pu concentration up to 0.03 formula units (f.u.). Reheating samples in H-2/N-2 atmosphere at 1400 degrees C did not produce obvious spectral change for Np-doped ThO2 and therefore no evidence of the formation of Np3+. However, the spectral lines attributed to Pu4+ decreased by approximately a factor of six in intensity, which implies reduction Of Pu4+ to Pu3+. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：192 / 196

页数：5

共 19 条

[1] The incorporation of plutonium and neptunium in zirconolite and perovskite [J].

Begg, BD ;

Vance, ER ;

Conradson, SD .

JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 271 :221-226

[2] ANALYSIS OF THE CRYSTAL-FIELD SPECTRA OF THE ACTINIDE TETRAFLUORIDES .1. UF4, NPF4, AND PUF4 [J].

CARNALL, WT ;

LIU, GK ;

WILLIAMS, CW ;

REID, MF .

JOURNAL OF CHEMICAL PHYSICS, 1991, 95 (10) :7194-7203

[3]

CARNALL WT, 1985, ANL8590

[4] THE ABSORPTION SPECTRA OF PLUTONIUM IONS IN PERCHLORIC ACID SOLUTIONS [J].

COHEN, D .

JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1961, 18 :211-218

[5] Charge distribution and local structure and speciation in the UO2+x and PuO2+x binary oxides for x ≤ 0.25 [J].

Conradson, SD ;

Begg, BD ;

Clark, DL ;

den Auwer, C ;

Ding, M ;

Dorhout, PK ;

Espinosa-Faller, FJ ;

Gordon, PL ;

Haire, RG ;

Hess, NJ ;

Hess, RF ;

Keogh, DW ;

Lander, GH ;

Manara, D ;

Morales, LA ;

Neu, MP ;

Paviet-Hartmann, P ;

Rebizant, J ;

Rondinella, VV ;

Runde, W ;

Tait, CD ;

Veirs, DK ;

Villella, PM ;

Wastin, F .

JOURNAL OF SOLID STATE CHEMISTRY, 2005, 178 (02) :521-535

[6] SPECTROSCOPIC, MAGNETIC AND X-RAY-POWDER DIFFRACTION STUDIES ON U(III) AND NP(III) FORMATES [J].

DROZDZYNSKI, J ;

SCHWOCHAU, K ;

SCHENK, HJ .

JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1981, 43 (08) :1845-1848

[7] ABSORPTION SPECTRUM OF NP4+ IN SINGLE-CRYSTAL THORIUM OXIDE [J].

GRUBER, JB ;

MENZEL, ER .

JOURNAL OF CHEMICAL PHYSICS, 1969, 50 (09) :3772-&

[8] ELECTRONIC-STRUCTURE OF U4+, NP4+, AND PU4+ DOPED INTO THSIO4 SINGLE-CRYSTAL [J].

KRUPA, JC ;

CARNALL, WT .

JOURNAL OF CHEMICAL PHYSICS, 1993, 99 (11) :8577-8584

[9] SPECTROSCOPIC PROPERTIES OF TETRAVALENT ACTINIDE IONS IN SOLIDS [J].

KRUPA, JC .

INORGANICA CHIMICA ACTA, 1987, 139 (1-2) :223-241

[10] OPTICAL SPECTROSCOPY OF NP-4+ (5F3) ION DILUTED IN THSIO4 AND THO2 CRYSTALLINE HOSTS [J].

LAHALLE, MP ;

KRUPA, JC ;

GUILLAUMONT, R ;

RIZZOLI, C .

JOURNAL OF THE LESS-COMMON METALS, 1986, 122 :65-73

← 1 2 →