University of Connecticut

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Atomic, Molecular, and Optical Physics Seminar

Monday, November 28, 2016
4:00pm – 5:00pm

Storrs Campus
Gant Science Complex, Physics, Room PB-121

Lutz Hüwel, of the Physics Department,Wesleyan University

Vibrationally Resolved Lifetimes of Double-Well and Shelf States of Sodium Dimer

For many molecular electronic states, in particular those with low excitation energy, the radiative lifetime does not vary much with vibrational quantum number. However, when transition dipole moments associated with a given electronic transition change rapidly as a function of internuclear distance, a more noticeable dependence on vibrational level can be expected. In addition, the role of bound-free transitions—while well known in principle—is sometimes underestimated. In our current work, we have explored both by experiment and with detailed calculations the state resolved electronic lifetimes of the 21Σu+ double well state and the 41g+ shelf state of the Na2 sodium dimer. Experiment and theory reveal features in the vibrational level dependence of the lifetimes that correlate with attributes of the corresponding potentials. While the double well state case shows reasonable agreement between experiment and theory, the (preliminary) analysis of the experimental shelf state data leads to lifetimes that are on average a factor of two lower than their theoretical counterpart. I will discuss details of our experimental as well as computational approach.


Dawn Rawlinson, 486-4916,

Physics Department (primary)

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