Dr. Thomas Papenbrock, an assistant professor of physics, co-authored a paper on the intricacies of the atomic nucleus, in the August issue of Physical Review Letters. Using a numerical technique called coupled-cluster theory, he and colleagues from Oak Ridge National Laboratory (ORNL) and the University of Oslo successfully computed the binding energies, radii, and densities of isotopes of helium, oxygen, calcium, and nickel within first-principles calculations. Until now, such calculations were limited to light nuclei up to carbon, but this work opened the door to first-principles calculations of much heavier nuclei. ORNL recognized this work with an award in the Scientific Research category at its recent Awards Night ceremonies.
G. Hagen, T. Papenbrock, D.J. Dean, and M. Hjorth-Jensen, “Medium-Mass Nuclei from Chiral Nucleon-Nucleon Interactions,” Physical Review Letters, Vol. 101: 092502 (2008).
T. Papenbrock, H. A. Weidenmüller, “Abundance of ground states with positive parity,” Physical Review C, Vol. 78: 054305 (2008).
M. G. Bertolli and T. Papenbrock, “Energy functional of the three-level Lipkin model,” arXiv:0805.2856 [nucl-th] (2008).
B. Dietz, B. Mößner, T. Papenbrock, U. Reif, A. Richter, “Bouncing ball orbits and symmetry breaking effects in a three-dimensional chaotic billiard,” Physical Review E, Vol 77: 046221 (2008).
D. J. Dean, G. Hagen, M. Hjorth-Jensen, T. Papenbrock, A. Schwenk, “Comment on ‘Ab Initio study of 40Ca with an importance-truncated no-core shell model,’” Physical Review Letters, Vol. 101: 119201 (2008).