Non-linearity issues and multiple ionization satellites in the PIXE portion of spectra from the Mars alpha particle X-ray spectrometer

Campbell, John L.; Heirwegh, Christopher M.; Ganly, Brianna

doi:10.1016/j.nimb.2016.07.004

Cited by 9 publications

(4 citation statements)

References 33 publications

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“…GUPIXWIN extracts peak intensities which converts to concentrations via the H-value standardisation method. It also, provides a non-linear least square fitting of the spectrum, together with subsequent conversion of the fitted X-ray peak intensities into elemental concentrations [9][10][11].…”

Section: Methodsmentioning

confidence: 99%

Elemental Characterization of African Locust Beans (Parkia biglobosa) in Igbope, Oyo State of Nigeria

Aborisade

Latif

Balogun

2021

AJAS

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African locus beans (Parkia biglobosa) tree is a perennial legume tree that grows naturally in Africa and one of the trees the Forest Rangers enforced that farmers must preserve in their farmland because of its usefulness. Parkia biglobosa when fermented can be used to produce Iru and other useful products. This work employed the Particle Induced X-ray Emission (PIXE) in the determination of major, minor and trace element constituents of leaves, seeds, stem in Parkia biglobosa from Igbope, using a 2.5 MeV proton ion beam analysis (IBA) facility. The samples contain nineteen (19) elements namely; Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Cr, Mn, Fe, Cu, Zn, Br, Sr, Y and Ba. Calcium has the highest average concentration 17183.2±25.8 ppm in the stem, followed by Sulphur 15361.7±20.0 ppm in the seed. The seed that is locally fermented to produce Iru has a higher concentration of Fe 1266.8±12.3 ppm. The results showed that Parkia biglobosa analysed in this work consist of several micro, major and trace elements of importance to human health. The plant is also free of harmful elements that can be hazardous to human health when consumed or used as herbal medicine.

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Section: Methodsmentioning

confidence: 99%

Elemental Characterization of African Locust Beans (Parkia biglobosa) in Igbope, Oyo State of Nigeria

Aborisade

Latif

Balogun

2021

AJAS

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“…It extracts peak intensities and converts these to concentrations via the H-value standardisation method. It provides a non-linear least square fitting of the spectrum, together with subsequent conversion of the fitted X-ray peak intensities into elemental concentrations (Campebell J. L. et al, 2018, Campbell J. L. et al, 2016and Russell J. L. et al, 2018.…”

Section: Methodsmentioning

confidence: 99%

Essential and trace element contents of <i>Moringa oleifera</i> from Akure and Ile-Ife in the south western Nigeria

Aborisade¹,

Ibitoye²,

Sogeke³

et al. 2019

Ife Journal of Science

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“…In principle, an obvious and direct way to deal with calibrating a PIXE system is to undertake highly accurate, direct measurements of the absolute or relative efficiency. Formerly, we did extensive work of this type using radionuclide standards, but this is expensive and does not help sufficiently with the region below 5 keV that is now of major importance in our current work on major elements in geological materials . Efficiency measurements with synchrotron radiation have been extremely successful, but very few PIXE laboratories have access to synchrotron facilities.…”

Section: Approachmentioning

confidence: 99%

“…The body of work on calibration of the former is much smaller. For our current work on both accelerator‐based PIXE analysis and alpha particle X‐ray spectrometer analysis of terrestrial and Martian geological materials, we have developed a simple but nonexpensive and accurate calibration approach for SDD‐based PIXE. This work has required attention to the choice of mass attenuation coefficients (MACs) within the GUPIX database and to the development of corrections for nonlinearity in the channel–energy relationship.…”

Section: Introductionmentioning

confidence: 99%

Role of the mass attenuation coefficient database in standardization of a silicon drift X‐ray detector for PIXE analysis

2017

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A simple, inexpensive procedure is described for calibrating a silicon drift detector‐based PIXE system for the analysis of geological and other “thick‐target” materials. It rests on the use of single element, chemical compound, and National Institute for Standards and Technology multielement standards. Much less effort has been focussed on the impact of mass attenuation coefficients on PIXE's analytical accuracy than on ionization cross sections and fluorescence yields. The calibrated system enables us to investigate the effects of inserting different mass attenuation coefficient datasets into the GUPIX database. For the K X‐rays of light elements, accuracy is significantly improved by replacing the formerly used XCOM self‐attenuation coefficients by the corresponding FFAST values; this effect decreases rapidly with increasing atomic number. Similar improvement was found for L X‐rays of medium‐Z, but not for high‐Z atoms.

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Non-linearity issues and multiple ionization satellites in the PIXE portion of spectra from the Mars alpha particle X-ray spectrometer

Cited by 9 publications

References 33 publications

Elemental Characterization of African Locust Beans (Parkia biglobosa) in Igbope, Oyo State of Nigeria

Elemental Characterization of African Locust Beans (Parkia biglobosa) in Igbope, Oyo State of Nigeria

Essential and trace element contents of <i>Moringa oleifera</i> from Akure and Ile-Ife in the south western Nigeria

Role of the mass attenuation coefficient database in standardization of a silicon drift X‐ray detector for PIXE analysis

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