Classical and Quantum Mechanical Investigations on Charge Transfer in Heavy Ion-Atom Interactions

2000 ◽  
pp. 267-280
Author(s):  
C. R. Mandal
Keyword(s):  
Charge Transfer ◽  
Heavy Ion ◽  
Quantum Mechanical

In situ AFM and XPS Investigation of U6+ Reduction by Fe2+ on Hematite and Pyrite

2012 ◽  
Vol 1444 ◽  
Author(s):  
Jingjie Niu ◽  
Udo Becker ◽  
Rodney Ewing
Keyword(s):  
Charge Transfer ◽  
Co Adsorption ◽  
Reduction Rate ◽  
Mulliken Charge ◽  
Quantum Mechanical ◽  
Quantum Mechanical Calculations ◽  
Initial Ph ◽  
Adsorption Reduction ◽  
Tapping Mode Afm

ABSTRACTUranyl adsorption/reduction by Fe2+ on hematite and pyrite has been studied at neutral pH under anoxic and CO2-free conditions. XPS results confirm that more U3O8 precipitates on hematite than on pyrite reacted for 24 h in 160 μM uranyl nitrate and 160 μM Fe2+ solution at initial pH 7.3. These results are explained in terms of co-adsorption energy and U atom Mulliken charge transfer by quantum mechanical calculations. Moreover, in situ fluid tapping-mode AFM experiments on hematite indicate a deceleration of the U reduction rate within 24 h due to the passivation of the surface caused by the formation of orthorhombic U3O8 crystals. In addition, crystals observed using AFM show morphologies of orthorhombic schoepite appearing on hematite after 5 h.

scholarly journals Charge transfer in asymmetric heavy-ion collisions

1980 ◽  
Vol 13 (15) ◽  
pp. L467-L472 ◽  
Author(s):  
P A Amundsen ◽  
D H Jakubassa
Keyword(s):  
Charge Transfer ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Ion Collisions
Sign in / Sign up

Export Citation Format

Share Document