Michigan Technological University
Department of Physics

is pleased to announce a colloquium

with

Steven O'Malley

RCI Calculations of Atomic Properties of Technetium: Difficulties and Improvements in Methodology

Technetium is the lightest element with no stable isotope and perhaps the only transition metal whose electron affinity is unmeasured. A longlived excited state of Tc I has been suggested for use in Atomic TrapTrace Analysis (ATTA) studies. The presence of the nearly half full 4d shell in Tc I (and to a lesser extent in Tc-) creates difficulties in Relativistic Configurations Interaction (RCI) calculations due to the complexity of the required basis (relative to simpler species with only a few valence d electrons or a nearly full d shell). Results will be presented for calculations of binding energies of bound states of Tc- as well as preliminary work on lifetimes of selected Tc I excited states.

Thursday, December 12, 2002

4:00 p.m., Fisher 139

Refreshments will be served

MTU | Physics | Colloquium