Faculty
 
Edward Pollack
Ph.D., Professor of Physics
 
Research Group Affiliation
Atomic and Ionic Collisions
and Surface Studies

 
University of Connecticut U-3046
2152 Hillside Road
Storrs, CT 06269-3046
 
Room No(s): P-320

P-04A
Edward Pollack

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My research involves work here as well as at the Atomic and Molecular Collisions Laboratory at JPL/Caltech. The program, which is supported by a NASA grant, is aimed at an understanding of the basic atomic and molecular physics processes that occur in the regions surrounding comets and in planetary atmospheres. Of particular interest are the collisions of heavy solar wind ions with atoms and molecules, in the cometary regions, that result in X-ray emission. Selected collision systems are being investigated by laboratory measurements of the cross sections for the single and double electron capture by multiply-charged ions. We are also studying the X-ray and optical spectra resulting from collisions of these ions with atomic and molecular targets. Since there are a large number of possible collision systems, in cometary atmospheres, the work is primarily aimed at testing proposed theories and models for the X-ray and optical emissions. To date we have studied the optical spectrum, in the range of 400-700 nm, excited by collisions of O5+, O3+, and O2+ with N2, CO, H2O, and Ar targets. Related experiments in the XUV spectral range have been set up at JPL. One goal of the XUV work is to test the applicability of the MO model to collisions involving highly-charged ions. Another aspect of our program involves a collaborative study, with a Connecticut College group, of S2+ and S+ collisions with Ar. This work is of interest in connection with the Jovian problem since sulfur ions generated from outgassed SO and SO2 on, the Jovian moon, Io are present in the plasma torus. Most recently we have obtained optical spectra for the sulfur/Ar collision systems. These results are currently being interpreted.
bullet UConn "Advance" (February 28, 2005)
Physics Professor, Edward Pollack, Dies

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