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Compositional studies of functional orthodontic archwires using prompt-gamma activation analysis at a pulsed neutron source
- Source :
- Journal of Analytical Atomic Spectrometry. 32:1420-1427
- Publication Year :
- 2017
- Publisher :
- Royal Society of Chemistry (RSC), 2017.
-
Abstract
- Prompt-gamma activation analysis (PGAA) measurements were carried out at the ISIS Spallation Neutron Source on two sets of functional commercial stainless steel orthodontic archwires, aiming at providing insights into the elemental and isotopic composition differences of two nominally equivalent archwires. The results were compared to those obtained from parallel cold neutron PGAA measurements on the same samples at the Budapest Neutron Centre in order to test the current status of PGAA at a pulsed neutron source and eventually to inform improvement in set-up and acquisition methods. In addition, time-resolved PGAA (T-PGAA) that combines PGAA and neutron time-of-flight methods was applied to the present set of samples, allowing the measurement of the neutron energy dependence of the PGAA spectra. The advantages of this technique were demonstrated to be that through incident neutron energy selection, spanning 0.07–67.94 eV, enhancement or decrease of specific gamma lines associated with isotopes of interest could be achieved. These were shown to reduce peak interference and to increase the signal-to-background ratio for certain species in order to facilitate accurate elemental identification. Suggestions for potential performance improvement for this evolving technique are proposed.
- Subjects :
- Isotope
Chemistry
Nuclear engineering
Analytical chemistry
02 engineering and technology
021001 nanoscience & nanotechnology
010403 inorganic & nuclear chemistry
01 natural sciences
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
Neutron temperature
Isotopic composition
Spectral line
0104 chemical sciences
Analytical Chemistry
Neutron source
Neutron
0210 nano-technology
Spectroscopy
Spallation Neutron Source
Subjects
Details
- ISSN :
- 13645544 and 02679477
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- Journal of Analytical Atomic Spectrometry
- Accession number :
- edsair.doi.dedup.....03e988a19f3f784b18b6703ec0c97f22