Abstract
Electrodeposited natural uranium films prepared by electrodeposition from solution of uranyl nitrate UO2(NO3)2·6H2O on stainless steel discs in electrodeposition cell. Solutions of NaHSO4, and Na2SO4 and electric current from 0.50 up to 0.75 A were used in this study. Recalculated weights and surface’s weights of 238U from the alpha activities and secondary ion mass spectrometry (SIMS) intensities resulted in a linear regression. A dependency between of 238U surface’s weights recalculated from alpha activities and signal intensity of 238U in SIMS was investigated in order to determine a potential of SIMS in quantitative analysis of surface samples containing uranium. In the SIMS spectra of electrodeposited uranium films we found that upper layer consist not only from isotopes of uranium (ions 234U+, 235U+, and 238U+). In the positive polarity SIMS spectra, various molecules ions of uranium were suggested as UH+, UH2 +, UO+, UOH+, UO2 +, UO2H+, UO2H2 +, as well as possibly ions UNO+ and UNOH+.
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