BARC/PUB/2014/0447

 
 

Chemical shift of U L3 edges in different uranium compounds obtained by X-ray absorption spectroscopy with synchrotron radiation

 
     
 
Author(s)

Joseph, D.; Nayak, C.; Babu, P. V.; Jha, S. N.; Bhattacharyya, D.
(NPD;ASD;NA&BTD)

Source

Bulletin of Materials Science, 2014. Vol. 37 (3): pp. 643-647

ABSTRACT

Uranium L3 X-ray absorption edge was measured in various compounds containing Uranium in U4+, U5+ and U6+ oxidation states. The measurements have been carried out at the Energy Dispersive EXAFS beamline (BL-08) at INDUS-2 Synchrotron radiation source at RRCAT, Indore. Energy shifts of ~ 2-3 eV were observed for U L3 edge in the U-compounds compared to their value in elemental U. The different chemical shifts observed for the compounds having the same oxidation state of the cation but different anions or ligands show the effect of different chemical environments surrounding the cations in determining their X-ray absorption edges in the above compounds. The above chemical effect has been quantitatively described by determining the effective charges on U cation in the above compounds.

 
 
SIRD Digital E-Sangrahay