Robert T. Poe

First results for 960 A.MeV 238U on 238U in the LBL streamer chamber

We report preliminary results for uranium on uranium collisions at the LBL streamer chamber facility, at the maximum Bevalac incident energy. Global event parameters are compared with results for Ar on KCl in the same energy region, and with intranuclear cascade model predictions. We also report results of temperature fits to negative pion spectra.

Two‐ and three‐pion correlations in Ar on Pb3O4 collisions

The technique of pion interferometry is used to study the pion source for central collisions of 1.8 GeV/nucleon Ar on Pb3O4. Both two and three pion correlations are presented.

Theoretical Study of Atomic Rydberg States

Recently, a new microwave-optical method was developed by Wing and Lamb1for the experimental study of the atomic Rydberg states. The new technique, with a 104 -fold improvement in resolution over the conventional spectroscopic methods, makes it possible for the first time to obtain accurate details on the previously unresolved electrostatic fine structures. As emphasized by those authors, the physics of the atomic Rydberg states holds special theoretical interest not only because of its quasi-hydrogenic nature but also because of its close relation to the scattering of slow electrons by the charged ion core. Thus the experimental breakthrough has added great impetus to the search for a parallel progress in theory, the search for a general, first-principle approach, capable of improved quantitative predictions as well as qualitative interpretations. As an attempt along this direction, we have carried out a theoretical study on the electrostatic fine structure of the Rydberg series for atomic helium within the framework of the Brueckner-Goldstone2 many-body perturbation theory approach.