Announcement of the Award of the 1990 Källén Prize
9 February 1990
The Royal Physiographic Society
of Lund Sweden announced today that
the winner of the 1990 Källén Prize is Professor Lorenzo Curtis of the
University of Toledo. The Award Citation was "For the contributions of Professor
Curtis to our knowledge of atomic physics, in which he and his colleagues have
provided elegant solutions to the problem of cascade repopulation in lifetime
measurements, discovered excitation anisotropies in ion-atom collisions, made
the first measurements of an optical transition in a negative ion, and
developed precise phemenological prediction methods for highly ionized atomic
The Prize is awarded once each three years from a fund established
in memory of
Gunnar and Gunnel Källén.
Gunnar Källén was a
brilliant young theoretical physicist who perished in a
plane crash in 1968 while returning from the European research center CERN.
The Prize conveys a cash award of 15 000 swedish crowns and is marked by
the presentation of a Memorial Lecture by the Recipient. The winner of the
1987 Prize was
Benoit Mandelbrot for his discovery of the Mandelbrot Set in the fractal
geometry of chaotic systems.