A new XRF spectrometer using a crystal monochromator and parallel plates beam guides - Perez, R. D.; Falchini, G. E.; Vincente, F. Cometto; Soares, Leonardo Diniz Hipólito; Poletti, Martín Eduardo; Sánchez, H. J. (Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2019)