The spectra of Ka x rays emitted as a result of heavy-ionatom collisions have been measured with a Bragg spectrometer using a variety of equal velocity (1.7 MeV/amu) heavy ions ranging from, H to , SAr incident on solid targets containing atoms of »Al, »Cl, and»K. In the cases of Cl and K, the measured Kal, -Ka satellite energy differences for one through seven L-shell vacancies were found to be systematically larger than those calculated using the Herman-SkillmanHartree-Fock-Slater program.Values of the binomial probability parameter obtained by fitting the relative satellite intensities with binomial distributions have been compared to theoretical values calculated using an impact-parameter formulation of the binary-encounter approximation. In the Al spectra obtained with S and Ar ions, the Ka» peak is observed to have an intensity six to seven times larger than is expected on the basis of a binomial fit to the satellite peaks.
imposed a complicated dependence of € M on d {^ = 1 +ad m3 /[bd~4' 96 +c(d)], where a and b are constants and c(d) is a material-dependent, rather complicated function of d of unknown form 18 } which cannot be reconciled with the experimental facts of Fig. 1. Further analysis of this and other points, studies, and applications will be given elsewhere.
The spectra of Kα X-rays produced by 1 to 3–MeV/amu H, He, O, Ne and S ion bombardment of magnesium and some of its compounds have been measured with a curved crystal spectrometer. The energies and intensities of the multiplets belonging to the first three Kα satellite groups are compared with the results of Hartree-Fock calculations. The influence of chemical environment on the Kα3/Kα4, Kα5/Kα6
, and Kα5/Kα7 intensity ratios is examined, and a strong dependence of the Kα3/Kα4 intensity ratio on projectile atomic number is observed.
Measurements of peak-to-background ratios for K x-ray production by 1.7 MeV/amu protons, alpha particles, carbon ions, and neon ions have been carried out for the purpose of determining the optimum projectile atomic number for particle induced x-ray emission analysis. The feasibility of applying the method to the trace element analysis of thick samples of tissue and blood serum has been explored.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.