Effect of vacuum heat treatment on plutonium oxide surfaces as studied by XPS and AES [report]

D.T. Larson
1980 unpublished
The e f f e c t o f h e a t i n g (I50 t o 500°C) i n vacuum a p l u t o n i u m s u b s t r a t e w i t h a p l u t o n i u m o x i d e s u r f a c e f i l m was s t u d i e d u t i l i z i n g X-ray photoe l e c t r o n spectroscopy (XPS) and Auger e l e c t r o n spectroscopy (AES). When p l u t o n i u m metal w i t h a s u r f a c e o x i d e f i l m i s vacuum h e a t t r e a t e d , t h e o x i d e Is reduced by r e a c t i o n o f t h e s u b s t r a t e metal w i t h t h e o x i d e .
more » ... t h e o x i d e . The r e a c t i o n s o c c u r r i n g were examined by m o n i t o r i n g t h e b i n d i n g e n e r g i e s of t h e Pu(4f 1, O ( l s ) , and C( Is) XPS peaks and o b s e r v i n g t h e C(KLL) 7 / 2 Auger e l e c t r o n peak s t r u c t u r e . These r e s u l t s were compared w i t h t h e X-ray d i f f r a c t i o n d a t a o f Terada e t a l . ' The XPS and AES d a t a show t h a t a t h i g h e r r e a c t i o n temperatures (400-500°C) t h e s u r f a c e compound formed i s n o t PuO as i n d i c a t e d by Terada e t a1 b u t i s i n s t e a d a p l u t o n i u m o x y c a r b i d e (Pu[C,O]) compound. P u O l .~( a -P u 2 0 3 ) , Pu(C,O), and Pu metal a r e 426.1, 424.4, 423.6, and 422.2 eV, r e s p e c t i v e l y . The Pu (4C7")) b i n d i n g e n e r g i e s f o r P u O 2 , DISCLAIMER I DISCLAIMER
doi:10.2172/6927680 fatcat:4spsndsrenf2vkoxurqjwms4dq