Results 321 to 330 of about 3,618,993 (411)

Raman Analysis of Roman Mosaics From the Upper Guadalquivir Valley (Spain)

open access: yesJournal of Raman Spectroscopy, EarlyView.
This work is focused on the Raman analysis of two Roman mosaics from Jaén (Spain) using portable and benchtop equipment, complemented by elemental analysis using EDXRF and petrographic analysis. The results obtained have provided a detailed characterisation of the tesserae.
A. Sánchez   +7 more
wiley   +1 more source

Thermally Optimised Raman Spectroscopy for Safe Analysis of Wall Paintings and Application to Lorenzetti's Masterpiece

open access: yesJournal of Raman Spectroscopy, EarlyView.
A portable dual‐wavelength Raman system (exc. 785 and 1064 nm) based on a four‐channel innovative probe for safe characterisation of artworks is presented. This instrument enables non‐contact real‐time monitoring of the temperature rise and laser power modulation to prevent overheating during Raman spectroscopy, through direct emissivity and ...
D. Ciofini   +7 more
wiley   +1 more source

The Stability of Manganese Oxides Under Laser Irradiation During Raman Analyses: II. Layer Structures

open access: yesJournal of Raman Spectroscopy, EarlyView.
Manganese oxides are important geomaterials with diverse technological applications. Here, we investigate the behaviour of the most common Mn oxides with layer structures under irradiation by a 532‐nm laser, with intensity ranging from 23 µW/µm2 to 36.8 mW/µm2.
Simone Bernardini   +4 more
wiley   +1 more source

Non‐invasive Analyses of an Etruscan Fibula From Vulci (Italy): The Benefits of a Combination of Micro‐Raman Spectroscopy, 3D Reconstruction Through X‐Ray Microscopy and ED‐XRF With Monte Carlo Simulation

open access: yesJournal of Raman Spectroscopy, EarlyView.
This study analyzed an Etruscan bronze fibula through non‐destructive techniques. The patina and alloy were examined using micro‐Raman spectroscopy and ED‐XRF with Monte Carlo simulations, revealing the formation of corrosion products such as brochantite and sampleite and a binary Cu‐Sn alloy composition.
Marta Porcaro   +10 more
wiley   +1 more source

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