Stochastic optimization of a uranium oxide reaction mechanism using plasma flow reactor measurements

Autor: Mikhail Finko, Batikan Koroglu, Kate E. Rodriguez, Timothy P. Rose, Jonathan C. Crowhurst, Davide Curreli, Harry B. Radousky, Kim B. Knight

Publikováno v: Scientific Reports, Vol 13, Iss 1, Pp 1-24 (2023)

Abstract In this work, a coupled Monte Carlo Genetic Algorithm (MCGA) approach is used to optimize a gas phase uranium oxide reaction mechanism based on plasma flow reactor (PFR) measurements. The PFR produces a steady Ar plasma containing U, O, H, a

Externí odkaz: https://doaj.org/article/ceb724d9c057403c9460b983150645b7

Fast imaging of laser ablation of cerium: Dependence of plasma plume dynamics and structure on native oxide growth

Autor: A. W. Auner, J. C. Crowhurst, L. A. Nagel, D. G. Weisz, A. C. Rousso, K. B. Knight

Publikováno v: AIP Advances, Vol 12, Iss 6, Pp 065119-065119-6 (2022)

We have imaged the evolution of plasma following nanosecond pulsed laser ablation of cerium in air with sub-10 ns resolution. We find the ablated plasma plume expansion and shape to be strongly dependent on the time after mechanical polishing of the

Externí odkaz: https://doaj.org/article/1761c14c0d2f4472a6ab8d60baad044c

Spectroscopic Signatures of MQ-Resins in Silicone Elastomers

Autor: James S. Oakdale, Jonathan C. Crowhurst, Robert S. Maxwell, Harris E. Mason, Hannah V. Eshelman, April M. Sawvel, Samantha Ruelas

Publikováno v: Macromolecules. 54:4300-4312

Polysiloxane elastomers have a large application space due to their versatile cross-linking chemistry and highly tunable physical and mechanical properties. One approach for improving the mechanical integrity of commercial polysiloxane “silicone”

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6a119000453f1b26d847a829c7a9f481
https://doi.org/10.1021/acs.macromol.1c00086

The effect of oxygen concentration on the speciation of laser ablated uranium

Autor: Mark A, Burton, Alex W, Auner, Jonathan C, Crowhurst, Peter S, Boone, Lauren A, Finney, David G, Weisz, Batikan, Koroglu, Igor, Jovanovic, Harry B, Radousky, Kim B, Knight

Publikováno v: Scientific reports. 12(1)

In order to model the fate and transport of particles following a nuclear explosion, there must first be an understanding of individual physical and chemical processes that affect particle formation. One interaction pertinent to fireball chemistry an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::9ec3997f2b3b5257310507e90a58b50b
https://pubmed.ncbi.nlm.nih.gov/35256710

Observation of Fundamental Mechanisms in Compression-Induced Phase Transformations Using Ultrafast X-ray Diffraction

Autor: Clemens Prescher, Joseph T. McKeown, Jonathan C. Crowhurst, Eduardo Granados, Inhyuk Nam, Elissaios Stavrou, Sergey S. Lobanov, Jonathan L. Belof, Peter Walter, S. Brown, John D. Roehling, Bob Nagler, Art J. Nelson, Alexander F. Goncharov, Harry B. Radousky, Graeme J. Ackland, Arianna Gleason, Nick Teslich, Tian T. Li, Vitali B. Prakapenka, Nicholas Holtgrewe, Hongxiang Zong, Michael R. Armstrong, Ryan A. Austin, Hae Ja Lee, Paulius Grivickas

Publikováno v: JOM
Armstrong, M R, Radousky, H B, Austin, R A, Stavrou, E, Zong, H, Ackland, G J, Brown, S, Crowhurst, J C, Gleason, A E, Granados, E, Grivickas, P, Holtgrewe, N, Lee, H J, Li, T T, Lobanov, S, McKeown, J T, Nagler, B, Nam, I, Nelson, A J, Prakapenka, V, Prescher, C, Roehling, J D, Teslich, N E, Walter, P, Goncharov, A F & Belof, J L 2021, ' Observation of Fundamental Mechanisms in Compression-Induced Phase Transformations Using Ultrafast X-ray Diffraction ', JOM, pp. 1-9 . https://doi.org/10.1007/s11837-020-04535-4

As theoretically hypothesized for several decades in group IV transition metals, we have discovered a dynamically stabilized body-centered cubic (bcc) intermediate state in Zr under uniaxial loading at sub-nanosecond timescales. Under ultrafast shock

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b29faf34b90aaffa6317ba21b42b6268
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5005410