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The Notre Dame Radiation Laboratory is supported by the Division of Chemical Sciences within the Office of Basic Energy Sciences at the U.S. Department of Energy, through a cooperative agreement with the University of Notre Dame.

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Monday, December 12, 2016

NDRL Seminar: Chemical Physics of Crystallization Luminescence


NDRL Auditorium

Dr. Shawn M. Kathmann, Physical Sciences Division
Pacific Northwest National Laboratory

Given the difficulty of directly observing clustering mechanisms underlying nucleation, classical and ab initio statistical mechanics provide crucial insight into the thermodynamics and kinetics of these processes. Recent experiments have shown nucleation can emit (e.g., crystalloluminescence) and be induced (e.g., IR lasers) by electromagnetic radiation. This opens up the possibility of using luminescence as an exquisite probe of the nucleation mechanism in addition to doing the reverse process by imposing external electromagnetic fields to activate specific modes of nucleation. The inclusion of electronic degrees of freedom as well as excited electronic states lies beyond classical theory. In addition, the osmotic coefficients of sub- and supersaturated aqueous electrolytes may provide quantitative insights into salt cluster distribution functions and free energies of crystal formation. Here we outline the chemical physics relevant to these findings and their consequences on how we understand and model nucleation to control and exploit the synthesis of matter.…

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Thursday, December 15, 2016

Student Spotlight

NDRL Physics Students win Poster Awards

Physics Department

The Fifth Annual Conference of the Graduate Physics Society was held on Wednesday, November 30. The event includes a poster session and and oral presentations.

Ten students presented posters, and awards are given for the poster session. Award receipients were: Xu Han; James Kapaldo; and Pitambar Sapkota.Oral presentations were given by these physics graduate students: Tyler Anderson, Stephen Kuhn, Chris Seymour, Luis Morales, Fatemeh Elahi, and Craig Reingold.…

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