The X-Ray Atomic and Molecular Science Program (XAMS) at the University of Nevada, Las Vegas (UNLV), represents a team of scientists using the Advanced Light Source (ALS) at the Lawrence Berkeley National Laboratory (LBNL) in Berkeley, California, for investigations of fundamental phenomena underlying x-ray interactions with gases.

This program pursues the fundamental investigations of the physical phenomena relevant to photon interactions with matter. Its focus is on understanding how geometrical and dynamical effects influence interactions between x-rays and molecules. These fundamental interactions between x-rays and matter play an important role in a number of fields, such as materials science, astronomy and astrophysics, planetary science, and even chemistry and biology.