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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determination of stable isotope ratios using nuclear reaction analysis coupled with a particle-gamma coincidence method

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Author(s):
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Allegro, Paula Rangel Pestana [1] ; Rizzutto, Marcia de Almeida [1] ; Added, Nemitala [1] ; Aguiar, Vitor angelo Paulino de [1] ; Toufen, Dennis Lozano [2] ; Macchione, Eduardo Luiz Augusto [1] ; Medina, Nilberto Heder [1] ; Ribas, Roberto Vicencotto [1] ; Oliveira, Jose Roberto Brandao de [1] ; Escudeiro, Rafael [1] ; Alcantara-Nunez, Juan Antonio [1] ; Curado, Jessica Fleury [3] ; Scarduelli, Valdir Brunetti [1] ; Zagatto, Vinicius Antonio Bocaline [1, 4] ; Rodrigues, Cleber Lima [1] ; Tabacniks, Manfredo Harri [1]
Total Authors: 16
Affiliation:
[1] Univ Sao Paulo, Inst Phys, BR-05508090 Sao Paulo, SP - Brazil
[2] Fed Inst Educ Sci & Technol Sao Paulo IFSP, BR-07115000 Guarulhos, SP - Brazil
[3] Univ Ctr FEI, Phys Dept, BR-09850901 Sao Bernardo Do Campo, SP - Brazil
[4] Fluminense Fed Univ UFF, Phys Inst, BR-24210340 Niteroi, RJ - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Journal of Analytical Atomic Spectrometry; v. 36, n. 1, p. 120-132, JAN 1 2021.
Web of Science Citations: 0
Abstract

A non-destructive standard-free analytical method of obtaining stable isotope ratios in materials using nuclear reactions excited by an 11.75 MeV proton beam is demonstrated for a special Cu-63/Cu-65 target characterized traceably by Rutherford backscattering spectrometry (using 2.2 MeV protons). The method is general and is capable of being a useful alternative to standard ICP-MS methods. Relatively high energy proton beams are required to excite multiple isotopes of most elements of interest, and the many resulting nuclear reaction products are filtered by coincidence methods to characterize the desired isotope ratios. Specifically: the use of particle-gamma coincidences permits identification of specific channels populated in the nuclear reaction and avoids or minimizes typical drawbacks of this method including high backgrounds and interfering reactions. The test Cu target was a sandwich of a natural Cu and an enriched Cu-65 foil, and particle-gamma coincidences were measured for the reactions Cu-63(p,pi gamma)[Cu-63,Ni-60] and the corresponding reactions for Cu-65 (where ``pi{''} represents the energetic charged particle reaction product: proton or alpha). Limitations of the method, and applications in cultural heritage and other fields are discussed. (AU)

FAPESP's process: 13/19976-8 - Characterization of cultural heritage materials using non destructive ion beam analysis
Grantee:Paula Rangel Pestana Allegro
Support type: Scholarships in Brazil - Post-Doctorate