The xraylib library for X-ray–matter interactions. Recent developments

Schoonjans, Tom; Brunetti, Antonio; Golosio, Bruno; Río, Manuel Sánchez del; Solé, V. A.; Ferrero, C.; Vincze, László

doi:10.1016/j.sab.2011.09.011

Cited by 371 publications

(348 citation statements)

References 25 publications

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“…We use the absorption and scattering cross-section from the publicly available xraylib library (Schoonjans et al 2011, https://github.com/tschoonj/ xraylib). For the X-ray radiative transfer we use the same numerical approach (e.g.…”

Section: Appendix A: X-ray Radiative Transfermentioning

confidence: 99%

Stellar energetic particle ionization in protoplanetary disks around T Tauri stars

Rab

Güdel

Padovani

et al. 2017

A&A

102

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Context. Anomalies in the abundance measurements of short lived radionuclides in meteorites indicate that the protosolar nebulae was irradiated by a high amount of energetic particles (E 10 MeV). The particle flux of the contemporary Sun cannot explain these anomalies. However, similar to T Tauri stars the young Sun was more active and probably produced enough high energy particles to explain those anomalies. Aims. We want to study the interaction of stellar energetic particles with the gas component of the disk (i.e. ionization of molecular hydrogen) and identify possible observational tracers of this interaction. Methods. We use a 2D radiation thermo-chemical protoplanetary disk code to model a disk representative for T Tauri stars. We use a particle energy distribution derived from solar flare observations and an enhanced stellar particle flux proposed for T Tauri stars. For this particle spectrum we calculate the stellar particle ionization rate throughout the disk with an accurate particle transport model. We study the impact of stellar particles for models with varying X-ray and cosmic-ray ionization rates. Results. We find that stellar particle ionization has a significant impact on the abundances of the common disk ionization tracers HCO + and N 2 H + , especially in models with low cosmic-ray ionization rates (e.g. 10 −19 s −1 for molecular hydrogen). In contrast to cosmic rays and X-rays, stellar particles cannot reach the midplane of the disk. Therefore molecular ions residing in the disk surface layers are more affected by stellar particle ionization than molecular ions tracing the cold layers/midplane of the disk. Conclusions. Spatially resolved observations of molecular ions tracing different vertical layers of the disk allow to disentangle the contribution of stellar particle ionization from other competing ionization sources. Modeling such observations with a model like the one presented here allows to constrain the stellar particle flux in disks around T Tauri stars.

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Section: Appendix A: X-ray Radiative Transfermentioning

confidence: 99%

Stellar energetic particle ionization in protoplanetary disks around T Tauri stars

Rab

Güdel

Padovani

et al. 2017

A&A

102

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“…The first one was developed specifically for XRF experiments, while the second one can be also used to simulate radiographic, CT and phase contrast simulations. Both codes are based on the Xraylib database [33,34]. In the current study, we used the second one, called XRMC [31].…”

Section: Methodsmentioning

confidence: 99%

An Energy-Dispersive X-Ray Fluorescence Spectrometry and Monte Carlo simulation study of Iron-Age Nuragic small bronzes (“Navicelle”) from Sardinia, Italy

Schiavon

Palmas

Bulla

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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A spectrometric protocol combining Energy Dispersive X-Ray Fluorescence Spectrometry with Monte Carlo simulations of experimental spectra using the XRMC code package has been applied for the first time to characterize the elemental composition of a series of famous Iron Age small scale archaeological bronze replicas of ships (known as the "Navicelle") from the Nuragic civilization in Sardinia, Italy. The proposed protocol is a useful, nondestructive and fast analytical tool for Cultural Heritage sample. In Monte Carlo simulations, each sample was modeled as a multilayered object composed by two or three layers depending on the sample: when all present, the three layers are the original bronze substrate, the surface corrosion patina and an outermost protective layer (Paraloid) applied during past restorations. Monte Carlo simulations were able to account for the presence of the patina/corrosion layer as well as the presence of the Paraloid protective layer. It also accounted for the roughness effect commonly found at the surface of corroded metal archaeological artifacts. In this respect, the Monte Carlo simulation approach adopted here was, to the best of our knowledge, unique and enabled to determine the bronze alloy composition together with the thickness of the surface layers without the need for previously removing the surface patinas, a process potentially threatening preservation of precious archaeological/artistic artifacts for future generations.

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“…In this paper we use the XRMC code. It is based on a continuously updated X-Ray database called Xraylib [21][22]. XRMC is able to simulate any kind of X-Ray analysis at energy up to 100 keV.…”

Section: Methodsmentioning

confidence: 99%

“…XRMC is able to simulate any kind of X-Ray analysis at energy up to 100 keV. Moreover, it is also able to simulate rough, irregular, surfaces which are often found in cultural heritage samples [22][23][24].…”

Section: Methodsmentioning

confidence: 99%

X-ray fluorescence spectroscopy and Monte Carlo characterization of a unique nuragic artifact (Sardinia, Italy)

Brunetti

Depalmas

Gennaro

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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The xraylib library for X-ray–matter interactions. Recent developments

Cited by 371 publications

References 25 publications

Stellar energetic particle ionization in protoplanetary disks around T Tauri stars

Stellar energetic particle ionization in protoplanetary disks around T Tauri stars

An Energy-Dispersive X-Ray Fluorescence Spectrometry and Monte Carlo simulation study of Iron-Age Nuragic small bronzes (“Navicelle”) from Sardinia, Italy

X-ray fluorescence spectroscopy and Monte Carlo characterization of a unique nuragic artifact (Sardinia, Italy)

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