An article by by Elizabeth Landau, senior communications specialist with NASA summarizes Randall Dannen's recent work on the physics of active galactic nuclei in Daniel Proga's research group. Read the NASA website article here. and Randall's original paper here.
This work investigates the structural and chemical stability of technetium under extreme conditions using in situ synchrotron X-ray diffraction. Utilizing advanced pressure and laser heating techniques we are able to access different regimes of the energy landscapes unexplored by previous studies. There are two sets of study; both of which are fundamental to understanding the physical and chemical behavior of this radioactive transition element. The first, is the discovery and characterization of a new, high pressure high temperature allotrope of Tc. Through structural analysis, we are able to demonstrate the existence of magnetic ordering - only the second example in a 4d metal. The second, is the synthesis of a new family of nitride compounds whose physical properties are explored.
The defense presentation is open to the public via Webex conference meeting hosted by Dr. Ashkan Salamat.
Monday, May 11, 2020 1:00 pm | 1 hour | (UTC-07:00) Pacific Time (US & Canada)
Meeting number: 289 418 495
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https://unlv.webex.com/unlv/j.php?MTID=mbab5a08416314818e58ffcb44449c204
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