Stored Energy Release in Copper Following Electron Irradiation below 20°K

Meechan, C. J.; Sosin, A.

doi:10.1103/physrev.113.422

Cited by 36 publications

(5 citation statements)

References 12 publications

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“…All files for the accuracy measures tests (Crosshair settings and solutions, accuracy measures, registration metadata, registration accuracy measures) and calibration of the angular rotation of the ultramicrotomes are available on BioStudies with id ‘S-BSST845’ ( https://www.ebi.ac.uk/biostudies/studies/S-BSST845 ). Diagrams, CAD files, and software for the two ultramicrotome systems are available in the following GitHub repositories: https://github.com/automated-ultramicrotomy/embl-system ( Meechan, 2022a ) and https://github.com/automated-ultramicrotomy/crick-system ( Jones, 2022 ). The Crosshair Fiji plugin is available with tutorials and documentation at the following GitHub repository: https://github.com/automated-ultramicrotomy/crosshair ( Meechan, 2022b ), along with a video tutorial on YouTube for the Leica system ( https://www.youtube.com/watch?v=OM712ECthGg ).…”

Section: Methodsmentioning

confidence: 99%

“…This allows the motor positions to be controlled and monitored easily by interacting with the touchscreen. The Node-RED user interface ‘flow’ json is available at https://github.com/automated-ultramicrotomy/embl-system/blob/main/node-red/node-red-flow.json ( Meechan, 2022a ). Once Node-RED is installed, the flow can be loaded by selecting ‘import’ from the menu and providing this .json file.…”

Section: Methodsmentioning

confidence: 99%

“…Diagrams, CAD files, and software for this system are available on the following GitHub repository: https://github.com/automated-ultramicrotomy/embl-system ( Meechan, 2022a ).…”

Section: Methodsmentioning

confidence: 99%

“…Diagrams/CAD files of the calibration setup are available in the following GitHub repositories: https://github.com/automated-ultramicrotomy/embl-system ( Meechan, 2022a ) and https://github.com/automated-ultramicrotomy/crick-system ( Jones, 2022 ). The tables of values used for the angular calibration are available on BioStudies ( https://www.ebi.ac.uk/biostudies/studies/S-BSST845 ).…”

Section: Methodsmentioning

confidence: 99%

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Crosshair, semi-automated targeting for electron microscopy with a motorised ultramicrotome

Meechan

Guan

Riedinger

et al. 2022

eLife

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Volume electron microscopy (EM) is a time-consuming process – often requiring weeks or months of continuous acquisition for large samples. In order to compare the ultrastructure of a number of individuals or conditions, acquisition times must therefore be reduced. For resin-embedded samples, one solution is to selectively target smaller regions of interest by trimming with an ultramicrotome. This is a difficult and labour-intensive process, requiring manual positioning of the diamond knife and sample, and much time and training to master. Here, we have developed a semi-automated workflow for targeting with a modified ultramicrotome. We adapted two recent commercial systems to add motors for each rotational axis (and also each translational axis for one system), allowing precise and automated movement. We also developed a user-friendly software to convert X-ray images of resin-embedded samples into angles and cutting depths for the ultramicrotome. This is provided as an open-source Fiji plugin called Crosshair. This workflow is demonstrated by targeting regions of interest in a series of Platynereis dumerilii samples.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Diagrams, CAD files, and software for this system are available on the following GitHub repository: https://github.com/automated-ultramicrotomy/embl-system ( Meechan, 2022a ).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Crosshair, semi-automated targeting for electron microscopy with a motorised ultramicrotome

Meechan

Guan

Riedinger

et al. 2022

eLife

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“…Blewitt, Coltman, and Redman deformed copper single crystals at 4VK and Meechan and Sosin (1958) deformed polycrystalline copper, nickel, and gold at 4 0 K. Both groups observed only minor annealing behavior on warming to 78°K (i.e., thA drop in resistivity was from 1 to 8 percent of the increase resulting from cold-work). For deformed aluminum single crystals (Sosin and Koehler, 1952), the drop at 78 0 K was about 9 percent of the resistivity increment produced by deformation at 4 0 K.…”

Section: More Cold-work Experiments To Shed Light On Defectsmentioning

confidence: 99%

Perspectives in Materials Research

1963

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Experimental determination of the preference energy in ferrites-spinels

Vologin

Дубинин

Parkhomenko

et al. 1976

Phys. Stat. Sol. (a)

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The cations in ferrites with spinel structure of the Me Fe (hlexFe2-x)04 type 1-x x (Me two-valent cations, x degree of inversion) may occupy two different types of sitesthe tetrahedral (a) and the octahedral ones (b), formed by the close packing of oxygen anions. It i s well-known (1, 2) that the equilibrium cation distribution at a temperature T i s determined by the mass action law) change of the internal energy of a where k Boltzmann constant, E b ferrite molecule connected with the cation pair exchange, E. preference energy of cations of type i (i: Me, Fe) to the site b. b = Enile -EFe 0 1 From equation (1) it follows that the immediate determination of E from meas-0 urements of the temperature dependence of the degree of inversion o r from different properties, caused by the degree of inversion, is possible only for ferrites with low values of E b i (for example, Me = Mg , Cu) .In this paper a method of experimental determination of high values of the preference energy is proposed with zinc ferrite a s an example (it possesses the structure of the normal spinel under the usual conditions). The essence of the method is the following.-2By irradiation with fast neutrons of D ,lo2' cm dose on ferrites an irreversible non-equilibrium cation distribution i s achieved at T = 320 K close to the statistical one x = 2/3 (3). This is accompanied by an increase of the ferrite internal energy with a value proportional to E . During the annealing this stored energy transfers into the specimen thermal energy and it allows to determine E . 0 0

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Stored Energy Release in Copper Following Electron Irradiation below 20°K

Cited by 36 publications

References 12 publications

Crosshair, semi-automated targeting for electron microscopy with a motorised ultramicrotome

Crosshair, semi-automated targeting for electron microscopy with a motorised ultramicrotome

Perspectives in Materials Research

Experimental determination of the preference energy in ferrites-spinels

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