Kutztown Chemistry Home Page KU Home Admissions Lab Safety Science Open House
Chemistry Home Faculty Courses Instruments Undergrad Research Biochemistry Home Other Science Departments Alumni Contact Us
Last Reviewed May 27, 2008
Chemistry Web Manager

Our research goals are to study the transfer of energy in collisions between a rare gases (like argon) and small molecules (in this case ethylene). Basically, we are throwing an argon atom at ethylene at various angles. Then we calculate the energy of the Ar-ethylene system as argon approaces. These potential energies are determined using classical trajectory calculations.

In the example shown below, the angle of argon approach was varied from linear to T-shaped.

Linear approach
KU Chemistry Undergraduate Research
An Ab Initio Potential Energy Surface for Argon and Ethylene

Dr. Rolf Mayrhofer
This potential energy contour map provides a picture of the energies associated with this type of collision. The potential energies used to construct this map were calculated using Gaussian 98 software.
Tee shaped approach

The plot below is like a countour map of the potential energy for the various positions of the argon atom relative to the ethylene. The distance between argon and ethylene is represented along the x axis, while the angle of approach is represented along the y-axis.

Potential Energy contour