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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.)

Improvements in the PIGE technique via gamma-ray angular distribution

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Author(s):
Pestana Allegro, Paula Rangel [1] ; Rizzutto, Marcia de Almeida [1] ; Medina, Nilberto Heder [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Phys, BR-05508090 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Microchemical Journal; v. 126, p. 287-295, MAY 2016.
Web of Science Citations: 3
Abstract

Particle induced gamma-ray emission (PIGE) is an ion beam technique used for isotopic elemental analysis of materials, based on gamma-ray spectroscopy. In the traditional PIGE setup, the gamma-ray detector is positioned at the neutral angles 55 degrees or 125 degrees with respect to the beam direction in order to measure gamma-rays with different angular distributions. Although these angles permit measurements without an a-priori knowledge of the specific angular distributions, this choice is not efficient if one wants to identify a specific element since a longer acquisition time is needed. In this work, we propose to optimize the PIGE measurements by choosing the detector angle position due to the previous knowledge of the gamma-ray multipolarity and the nuclear reaction. We present the angular distribution calculations for the isotopes most frequently identified by PIGE analysis, specially in Cultural Heritage objects. Calculations demonstrate that a gain in the intensity up to 70% can be achieved allowing the elemental identification in shorter times. This result is promising and represents a more efficient alternative to perform PIGE measurements. (C) 2015 Elsevier B.V. All rights reserved. (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