LibCPIXE: A PIXE simulation open-source library for multilayered samples

Pascual-Izarra, C.; Barradas, N.P.; Reis, M.A.

doi:10.1016/j.nimb.2006.03.147

Cited by 34 publications

(18 citation statements)

References 10 publications

(15 reference statements)

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“…include these "normal" effects [28,29]. The second amazing result in Figure 1 is the resemblance between the patterns for the Gd 2 O 3 5 nm particles and those for the Gd-DOTA pellet, in the Lβ 2,15 /Lα 1 plot.…”

Section: Ryiedmentioning

confidence: 77%

L X-Rays RYIED Oscillations and Proton-NMRD of Gd₂O₃ Nanoparticles

Taborda

Reis

Chaves

et al. 2011

Physics Research International

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Recently, it was shown that relative yields of X-rays induced by ion impact are not constant but depend on beam energy. In the framework of this problem, pellets of Gd 2 O 3 and a Gd chelate, Gd-DOTA, as well as a 5 nm in diameter Gd 2 O 3 nanoparticles dispersion on a polycarbonate Nuclepore filter, were studied. In this work, it is shown that after subtraction of known matrix effects, relative yield variations still present different patterns for Gd 2 O 3 pellet and Gd 2 O 3 nanoparticles. Proton NMRD T 1 (ω) data for Gd 2 O 3 nanoparticles and Gd-DOTA water solutions published by Bridot et al. and Toth et al., respectively, were reproduced using a model for paramagnetic substances in water solutions and identical electronic relaxation times. The analysis of both techniques results points collective electron behaviour as the explanation for the different observations on X-ray data of Gd 2 O 3 nanoparticles and bulk material.

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Section: Ryiedmentioning

confidence: 77%

L X-Rays RYIED Oscillations and Proton-NMRD of Gd₂O₃ Nanoparticles

Taborda

Reis

Chaves

et al. 2011

Physics Research International

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“…We now plan to apply the model in quantitative PIXE data analysis done with the codes DATTPIXE 43 and NDF/LibCPIXE. 44…”

Section: Discussionmentioning

confidence: 99%

Accurate calculation of pileup effects in PIXE spectra from first principles

Barradas

Reis

2006

X-Ray Spectrometry

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Background subtraction in PIXE spectra has been a persistent problem in PIXE data analysis. Pile-up represents an important contribution to the background, but its treatment in software codes handling PIXE spectra frequently suffers from strong or even incorrect approximations. This paper gives a short review of various studies and methods of pile-up correction and applies an analytic calculation based on first principles for PIXE spectra pile-up subtraction. No distinction between peak and continuum contributions is necessary. The only parameters required for the calculation are the collection time, the shaping time of the amplifier and the resolving time of the pile-up rejection system, without any need for normalisation constants. Calculations are presented for a series of experimental PIXE spectra, for different count rates and amplifier shaping times and spectra collected with the pile-up rejection system on and off. The agreement between calculated and observed pile-up is excellent.

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“…One of the important points in NDF is that it supports PIXE, being the sole code for general analysis of IBA data [13,14] that fully integrates PIXE with RBS, ERDA, and NRA [19,20]. Any number of spectra collected from the same sample, taken with any of these techniques in any experimental condition, can be analysed simultaneously with the same depth profile as fit parameter [21].…”

Section: Advanced Algorithmsmentioning

confidence: 99%