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.

Tian, K.v., Festa, G., Szentmiklosi, L., Maroti, B., Arcidiacono, L., Lagana', G., et al. (2017). Compositional studies of functional orthodontic archwires using prompt-gamma activation analysis at a pulsed neutron source. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 32(7), 1420-1427 [10.1039/c7ja00065k].

Compositional studies of functional orthodontic archwires using prompt-gamma activation analysis at a pulsed neutron source

FESTA, GIULIA;LAGANA', GIUSEPPINA;ANDREANI, CARLA;LICOCCIA, SILVIA;SENESI, ROBERTO;COZZA, PAOLA
2017-01-01

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.
2017
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/07 - FISICA APPLICATA (A BENI CULTURALI, AMBIENTALI, BIOLOGIA E MEDICINA)
English
Con Impact Factor ISI
Tian, K.v., Festa, G., Szentmiklosi, L., Maroti, B., Arcidiacono, L., Lagana', G., et al. (2017). Compositional studies of functional orthodontic archwires using prompt-gamma activation analysis at a pulsed neutron source. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 32(7), 1420-1427 [10.1039/c7ja00065k].
Tian, Kv; Festa, G; Szentmiklosi, L; Maroti, B; Arcidiacono, L; Lagana', G; Andreani, C; Licoccia, S; Senesi, R; Cozza, P
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/189430
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