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Seminars And Colloquia This Week

ics Atomic
Monday, March 18, 2019
3:30 PM
Physics Building, Room 204
ics Nuclear
Tuesday, March 19, 2019
3:30 PM
Physics Building, Room 204


ics High Energy
Wednesday, March 20, 2019
3:30 PM
Physics Building, Room 204
Christopher White, Ph.D. [Host: Craig Dukes]
Illinois Institute of Technology
"Neutrino Physics from the PROSPECT Experiment"

PROSPECT, the Precision Oscillation and Spectrum Experiment, is a reactor antineutrino experiment designed to search for eV-scale sterile neutrinos and measure the spectrum of antineutrinos from highly-enriched 235U at the High Flux Isotope Reactor (HFIR). PROSPECT uses a 4-ton, segmented 6Li-doped liquid scintillator detector to make a high-resolution measurement of the prompt energy spectrum from inverse beta decay on protons. An optical and radioactive source calibration system integrated into the active detector volume is used to characterize the optical and energy response of all detector segments. I will discuss the calibration and characterization of the PROSPECT detector and report on PROSPECT’s first measurement of the energy spectrum associated with reactor antineutrinos.

ics Condensed Matter
Thursday, March 21, 2019
11:00 AM
Physics Building, Room 313
Zhenyang Xu [Host: Despina Louca]
University of Virginia - Physics
"Metal-Insulator Transition in Phase Change Material Ge2Sb2Se5xTe5-5x"

Ge2Sb2Te5 (GST-225) is a phase change material which has wide use in fabricating random access memories. With different quenching process, the GST-225 could have three different phases: an amorphous phase, an intermediate cubic phase, a crystalline hexagonal phase. The fast transition between amorphous and crystalline phase makes GST-225 an ideal material for RAM with fast speed. In our project, the Se-doped GST-225 materials are grown and studied. At x=0.9 in liquid nitrogen quenched samples, we observe a phase transition from crystalline to amorphous. The transport measurement also confirm that there are metal-insulator transition happen for both furnace cooled samples and liquid N2 quenched samples at this limit. A tentative hypothesis is proposed to explain this metal-insulator transition. 

ics Colloquium
Friday, March 22, 2019
3:30 PM
Physics Building, Room 204
Jim Gates, Ph.D. [Host: Diana Vaman]
Brown University
"A Mathematical Journey Thru SUSY, Error-Correcting Codes, Evolution, and a Sustainable Reality "

This presentation describes an arc in mathematical/theoretical physics traversing concepts from equations, graphs, error-correction, and pointing toward an evolution-like process acting on the  mathematical laws that sustain reality.

To add a speaker, send an email to phys-speakers@Virginia.EDU. Please include the seminar type (e.g. Seminars and Colloquia), date, name of the speaker, title of talk, and an abstract (if available).