ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Applied Spectroscopy in the Physicochemical Analysis of Indigenous Xetá Pigments - Vesuvio
Abstract: This proposal aims to investigate the molecular composition, hydrogen content, and degradation pathways of historical pigments used by the Xet indigenous people, preserved in Brazil museum collections. Preliminary analyses using UV-Vis, Raman spectroscopy, EDS, and NMR indicate that both studied pigments one identified as genipap extract and the other cataloged as iron oxide are predominantly organic and exhibit signs of degradation. However, strong luminescence and compositional complexity limit the effectiveness of conventional spectroscopic techniques. To overcome these challenges, we propose the use of Deep Inelastic Neutron Scattering (DINS) on the VESUVIO instrument, which offers unique sensitivity to hydrogen and is not affected by luminescence. The experiment will quantify the hydrogen content across the different fractions (liquid, gelatinous, and solid) of the genipap sample, enabling the identification of structural heterogeneities and correlations between hydrogen content and degradation stages. The results are expected to provide unprecedented insight into the physicochemical nature and preservation state of these rare cultural heritage materials, contributing to both heritage science and the understanding of organic pigment degradation.
Principal Investigator: Miss Bruna Gohl
Experimenter: Mr Marcelo Prado Cionek
Local Contact: Dr Matthew Krzystyniak
Experimenter: Professor Emerson Cristiano Barbano
DOI: 10.5286/ISIS.E.RB2620671
ISIS Experiment Number: RB2620671
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2620671-1 | VESUVIO | 17 October 2029 | Download |
Publisher: STFC ISIS Neutron and Muon Source
Data format: RAW/Nexus
Select the data format above to find
out more about it.
Data Citation
The recommended format for citing this dataset in a research
publication is as:
[author], [date], [title], [publisher],
[doi]
For Example:
Miss Bruna Gohl et al; (2026): Applied Spectroscopy in the Physicochemical Analysis of Indigenous Xetá Pigments - Vesuvio, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2620671
Data is released under the CC-BY-4.0 license.
