International Atomic Energy Agency inter-comparison of particle induced gamma-ray emission codes for bulk samples

Barradas, N.P.; Cruz, J.; Fonseca, M.; Jesus, A.P.; Lagoyannis, A.; Manteigas, V.; Mayer, M.; Preketes–Sigalas, K.; Dimitriou, P.

doi:10.1016/j.nimb.2020.02.019

Cited by 11 publications

(4 citation statements)

References 24 publications

(46 reference statements)

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“…ERYA-Bulk [22], a recent version of ERYA, calculates gamma-ray yields for in-depth homogeneous samples from eq. (2), neglecting beam energy spread and energy straggling, since the effect of these on the bulk yield are negligible [23].…”

Section: Pige Methodologymentioning

confidence: 99%

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Fluorine depth profiling based on the 19F(p,p’γ)19F excitation function

et al. 2021

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Ion beam analysis of fluorine has applications in research on teeth and bones, materials science, geochemistry and archaeometry. A novel PIGE (Particle Induced Gamma-ray Emission) standard free methodology for fluorine content determination for in-depth heterogeneous samples based on the excitation function of the 19 F(p,p') 19 F nuclear reaction is presented. New precise cross section measurements of this reaction in the proton energy range 2.1 to 4.1 MeV have been performed. In addition, the ERYA-Profiling code, a computer program specially developed for PIGE analysis of in-depth heterogeneous samples, employed this new excitation function in a case study where different fluorine simulated depth profiles probed the capability of insight into fluorine distributions in a given sample, showing the potential of PIGE analysis.

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Section: Pige Methodologymentioning

confidence: 99%

“…Beams with current intensities between 100 and 200 nA were used. The proton energy was calibrated with the 1645.1 and 1930.7 keV resonances of the reaction 23 Na(p,p') 23 Na and the 3470 keV resonance of the 16 O(p,p) 16 O reaction.…”

Section: Methodsmentioning

confidence: 99%

Fluorine depth profiling based on the 19F(p,p’γ)19F excitation function

et al. 2021

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“…The elements detected by PIGE are limited in number, but complementary to those detected by PIXE: in such a way PIGE technique is thus a perfect "sidekick" or a companion of PIXE for the analysis of light elements in cultural heritage samples (Figure 4). Quantitative information from PIGE spectra is typically obtained by comparing the gamma-ray yields from the sample to those from homologous reference standards, although free dedicated codes for standard-less PIGE analysis, such as PIGRECO [29] and ERYA [30], are now becoming available. 27 Al 843 100% 27 Al(p,p'γ) 27 Al 1013 100%…”

Section: Pigementioning

confidence: 99%

“…Si 28 Si(p,p'γ) 28 Si 1779 92.23% 29 Si(p,p'γ) 29 Si 1273 4.67% The detectors typically employed for PIGE analysis are High-Purity Germanium (HPGe) detectors, because germanium is still the only material which can provide a combination of high-energy resolution and high-detection efficiency at the gamma-ray energy of interest. The drawback to using these detectors, though, has always been the need to cool them to cryogenic temperatures (about 77 K), using, traditionally, liquid nitrogen with a combination of a cryostat and a dewar.…”

Section: Pigementioning

confidence: 99%

External Beam IBA Measurements for Cultural Heritage

Chiari

2023

Applied Sciences

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Ion beam analysis (IBA) methods refer to a set of analytical techniques based on the interactions of energetic ions, produced by a particle accelerator, with matter. The result of such interactions is the emission of characteristic radiation, X and gamma rays, and charged particles, which, upon detection, provide valuable information on the absolute concentration and depth distribution of the elements in the bombarded material. Moreover, IBA techniques can be performed while maintaining the object to be investigated at atmospheric pressure, without placing it in vacuum, in an analysis chamber, with the impinging ion beam extracted from the in-vacuum beamline of the accelerator, avoiding the need of invasive sampling and greatly easing the object positioning, thus allowing precious and big or large artefacts to be studied. This feature has opened the way for applications of IBA techniques for compositional analysis in cultural heritage studies, providing detailed and complete information about elemental compositions and depth distributions of analysed materials that are otherwise difficult or impossible for other analytical techniques. In this paper, the basic principles of the main IBA techniques applied to cultural heritage, namely, particle induced X-ray emission (PIXE), particle induced Gamma-ray emission (PIGE), and Rutherford or elastic backscattering spectrometry (RBS/EBS), will be recalled, and specific and practical details on how these techniques can be used for analysing cultural heritage objects with external beam set-ups will be provided.

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The 2021 IAEA software intercomparison for k0-INAA

Blaauw

D'Agostino

Luzio

et al. 2022

J Radioanal Nucl Chem

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In order to establish the variation between results in mass fractions due to software implementation, as measured by the k0-method for INAA, the IAEA has organized a software intercomparison. A complete set of test spectra and associated information was assembled. Efficiency curves, neutron spectrum parameters, correction factors and mass fractions were calculated with the participating programs (k0-IPEN, k0-INRIM, k0-DALAT, k0-IAEA and KayWin) using identical peak areas. In this paper, we report on the observed discrepancies, causes, remedies and future software developments. The test data, as well as intermediate results and observed mass fractions of the certified reference material BCR-320R “channel sediment” are available through the IAEA on request. The variations in concentrations attributed to differences between the programs were initially found to be 5.6 and 7.9%, for certified and uncertified concentrations, respectively. After the certified concentrations had been made available to the participants and they had been allowed to improve their programs, the variations found were 2.7 and 3.4%, respectively. The main identified remaining causes of variation are differences in the procedures used for detector efficiency characterisation and neutron spectrum parameter determination.

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International Atomic Energy Agency inter-comparison of particle induced gamma-ray emission codes for bulk samples

Cited by 11 publications

References 24 publications

Fluorine depth profiling based on the 19F(p,p’γ)19F excitation function

Fluorine depth profiling based on the 19F(p,p’γ)19F excitation function

External Beam IBA Measurements for Cultural Heritage

The 2021 IAEA software intercomparison for k0-INAA

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