Seminars

# PIER Photon Science Colloquium: Ions in the light of synchrotron radiation

## by Alfred Müller (Justus-Liebig-Universität Giessen)

Friday, June 3, 2011 from to (Europe/Berlin)
at Bldg. 28c, seminar room
 Description Photoionization and -fragmentation of ions is studied by employing the photon-ion merged-beam technique. High resolution spectroscopic data and absolute cross sections are obtained. Photoionization is related to electron-ion recombination via time reversal symmetry. Measurements of both processes provide complementary insights into the formation and decay of resonances. Important applications of this work are in astrophysics. Besides atomic ions also electrically charged molecules or clusters can be investigated by the merged-beam technique. Since the discovery of endohedral fullerenes their response to photoabsorption by the encaged atom has been a subject of intense theoretical research. Only recently, experiments testing some of the theoretical predictions have become possible.