Among the numerous heavy ion reactions, those of potential interest for chemical analysis can be identified based on their
Q values, Coulomb barriers, and threshold energies. A simple computer code has been written for these calculations. The use
of the calculated data is illustrated with a survey of the possibilities of HIAA with N+, Li+, B+, Be+ and C+ beams yielding radioisotopes with half-lives of 10 to 104 sec.
Authors:C. Barros Leite, G. Baptista, E. Montenegro, and A. Paschoa
A graphical method was developed to relate data from Rutherford backscattering spectrometry to sample characteristics, such as thickness and concentration profiles. The method was then applied to analyze these characteristics of a gold film.
Authors:G. Baptista, E. Montenegro, C. Barros Leite, and A. Paschoa
The accuracy of the quantitative analysis of thick targets by XRF is impaired by effects due to the absorption of X-rays in
the matrix associated with the non-uniformity of the X-ray beam and the lack of knowledge of the actual distribution of trace
elements in the target. The uncertainty in the elemental mass associated to a definite number X-rays detected is discussed
in the paper. A correction factor is derived to account specifically for the effect of the absorption of X-rays and the non-uniformity
of the X-ray beam.