Department of Physics

Indian Institute Of Technology Madras , Chennai

Experimental studies on Negative-Ion Resonances

Speaker : Dr. G. Aravind, IITM.


Abstract :

Excited electronic states of anions that are embedded in the detachment continuum are called resonance states. These resonances may eventually autodetach an electron or dissociate into fragments. Control of chemical reactions, understanding the structure and dynamics of the interstellar medium (ISM), to mention a few, depends on our knowledge of these resonance states. Electron correlations render theoretical studies on anion resonances rather formidable. We will discuss our recent experimental studies on the resonances in FeC anion through collision-induced dissociation. Considering the presence of transition-metal carbides and FeCN in the ISM, our studies on FeC is of astrophysical relevance. We will also discuss how photoelectron angular distribution and photodetachment cross-sections can probe these resonances. We will discuss our results on photoelectron spectroscopy on TaC anion and briefly on our recent efforts to study anion resonances through Velocity Map Imaging.


Aravind did his Bachelors in Electrical and Electronics Engineering and Masters in Physics from BITS, Pilani. He then did his Ph.D on the detachment and dissociation of anions from the Tata Institute of Fundamental Research, Mumbai, India. He studied photodissociation lifetimes of large biomolecules during his postdoctoral stint at Aarhus University, Denmark. He also worked on the design of an Ion-trap experimental setup at the University of Basel, Switzerland.

Key Speaker Dr. G. Aravind, IITM.
Guests None
Place S N Bose Hall (HSB 210)
Start Time 5:00 PM
Finish Time 6:00 PM
External Link None