Sara Nonni

Sara Nonni
The University of Manchester at Harwell

PhD
X-Ray tomography laboratory, 3D imaging and synchrotron beamtime support

About

26
Publications
5,075
Reads
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310
Citations
Additional affiliations
October 2010 - March 2014
Sapienza University of Rome
Position
  • PhD

Publications

Publications (26)
Article
Crystallisation is a complex process that significantly affects the rheology of magma, and thus the flow dynamics during a volcanic eruption. For example, the evolution of crystal fraction, size and shape has a strong impact on the surface crust formation of a lava flow, and accessing such information is essential for accurate modelling of lava flo...
Article
Full-text available
Basaltic eruptions are the most common form of volcanism on Earth and planetary bodies. The low viscosity of basaltic magmas inhibits fragmentation, which favours effusive and lava-fountaining activity, yet highly explosive, hazardous basaltic eruptions occur. The processes that promote fragmentation of basaltic magma remain unclear and are subject...
Poster
Full-text available
WEATHERUP, University of Manchester, UOMAH TEAM, DIAMOND LIGHT SOURCE TEAM-We have created a portal to extreme science at the UK national laboratory site at Harwell (University of Manchester at Harwell; UoMaH). This partnership, between the UoM, STFC and DLS has created a core team to assist users and work with the facilities to drive innovation. F...
Article
Two-stage preheating is used in selective electron beam melting to prevent powder spreading during additive manufacturing (AM); however, its effects on part properties have not been widely investigated. Here, we employed three different preheat treatments (energy per unit area, EA) to a Ti-6Al-4V powder bed. Each standalone build, we fabricated a l...
Research
The low viscosity of basaltic magmas generally favours effusive and mildly explosive volcanic activity. Highly explosive basaltic eruptions occur less frequently and their eruption mechanism still remains subject to debate [1] [2] [3] [4], with implications for the significant hazard associated with explosive basaltic volcanism. Particularly, highl...
Article
Olivine is a key constituent in the silicate Earth; its composition and texture informs petrogenetic understanding of numerous rock types. Here we develop a quantitative and reproducible method to measure olivine composition in three dimensions without destructive analysis, meaning full textural context is maintained. The olivine solid solution bet...
Conference Paper
Full-text available
A thermo-mechanical rig (P2R) is being developed to replicate on a synchrotron the conditions of pressure (P), temperature (T), oxygen fugacity (fO2) and volatile content that magmas experience during eruptions. Using synchrotron X-ray tomography (sCT), this innovative technology will allow us to directly capture and quantify the kinetics of both d...
Article
Full-text available
Magma crystallisation is a fundamental process driving eruptions and controlling the style of volcanic activity. Crystal nucleation delay, heterogeneous and homogeneous nucleation and crystal growth are all time-dependent processes, however, there is a paucity of real-time experimental data on crystal nucleation and growth kinetics, particularly at...
Article
Full-text available
We present new software allowing significantly improved quantitative mapping of the three-dimensional density distribution of objects using laboratory source polychromatic X-rays via a beam characterisation approach (c.f. filtering or comparison to phantoms). One key advantage is that a precise representation of the specimen material is not require...
Article
Full-text available
To date, finding a technique able to effectively isolate the carbon signal from the binder of a mortar is still an open challenge. In this paper, the radiocarbon ( ¹⁴ C) dating of one of the most challenging and diffuse types of mortar, the one with pozzolana aggregate, is investigated. Eight mortar samples from three archaeological sites near Rome...
Conference Paper
Synchrotron X-ray computed microtomography (sCT) allows 3D images of materials to be captured in a few seconds. Combining this technology with an environmental cell that replicates the temperatures and pressures experienced during magmatic processes offers to provide a tool to directly capture the kinetics of both crystal and gas phase formation in...
Article
Full-text available
Mortars represent a class of material basical-ly constituted by a mixture of different phases (i.e. binder, aggregates, water) and widespread used for constructive uses and artworks. Current scientific literature regarding the pos-sibility of mortar radiocarbon dating reports dif-ferent and still contradictory results. Most of the observed inaccura...
Article
Full-text available
Mortars represent a class of material basically constituted by a mixture of different phases (i.e. binder, aggregates, water) and widespread used for constructive uses and art-works. Current scientific literature regarding the possibility of radiocarbon dating mortar reports different and still contradictory results. Most of the observed inaccuracy...
Article
Full-text available
This paper reports the results from applying the Cryo2SoniC (Cryobreaking, Sonication, Centrifugation) protocol to some lime mortars sampled from the citadel of Shayzar (Syria). The overall aims of this project are to i) use the properties offered by the high-precision accelerator mass spectrometry (AMS) radiocarbon dating for the evaluation of its...
Article
Full-text available
This paper reports the results from applying the Cryo2SoniC (Cryobreaking, Sonication, Centrifugation) protocol to some lime mortars sampled from the citadel of Shayzar (Syria). The overall aims of this project are 1) to use the properties offered by high-precision accelerator mass spectrometry (AMS) radiocarbon dating for the evaluation of absolut...
Article
Centre for Isotopic Research on Cultural and Environmental heritage (CIRCE) has, recently, obtained some promising results in testing the feasibility of mortar radiocarbon dating by means of an ad hoc developed purification procedure (CryoSoniC: Cryobraking, Sonication, Centrifugation) applied to a series of laboratory mortars. Observed results enc...
Article
Mortars represent a class of building and art materials that are widespread at archeological sites from the Neolithic period on. After about 50 years of experimentation, the possibility to evaluate their absolute chronology by means of radiocarbon ((14)C) remains still uncertain. With the use of a simplified mortar production process in the laborat...

Questions

Question (1)
Question
I am work on a mummified hand attributed to a Saint. To retrieve as much info as possible from it, I would like to know if I can look to specific features. Anything that will allow me to know little bit more about its old owner identity and his/her physical state. I know hands are not so popular in osteo-archaeology to determine sex or specific diseases, but if someone could give me some tips, it would be great.
I have a 3D reconstruction of it acquired by X ray so I can look through its internal structure as well.

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