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Colloquium with Dr. Sukhamoy Bhattacharyya on March 29

Mar 20, 2013

PHYSICS COLLOQUIUM
Speaker: Dr. Sukhamoy Bhattacharyya
Date: Friday, March 29, 2013
Time: 4 PM
Room: 205 Currens Hall

Fluorescence Active Resonance States of Helium-like Ions

Abstract:

The spectral properties of atomic systems under different environments change considerably compared with those of the free systems. Currently this is a subject of wide interest in astrophysics, plasma physics, condensed matter physics and many other areas. The first phase of the talk is prepared to provide an overview of the spectral properties of bound and resonance states of two-electron atoms in free case as well as in some external environment like plasma confinement, spherical cavity etc. In the second phase, the dominance of fluorescence decay probability over autoionization for some resonance states of helium-like atoms will be discussed. Theoretical explanation of the peculiar behavior of some resonance states showing dominant dipole transition probability has been established. Present theoretical results have been verified in collaboration with experimental groups for two-electron ions of Cl and Si. Relevance with some astrophysical data for helium-like Oxygen from Jupiter has been established.

About the speaker:
Dr. Sukhamoy Bhattacharyya presently works as a Fulbright post-doctoral scholar at the Department of Physics, Auburn University. He is an Assistant Professor in APC College (affiliated to West Bengal State University, India). His research interest is in theoretical spectroscopy of two-electron atoms and different exotic systems under different kind of confinements with applications in plasma diagnostics, astrophysical data analysis.

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