Rostock 2019 – scientific programme

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MO: Fachverband Molekülphysik

MO 9: Molecules in Intense Laser Fields

MO 9.5: Talk

Monday, March 11, 2019, 17:15–17:30, S HS 002 Biologie

On the Role of singly-excited Rydberg states in Sequential H2 Multiphoton Ionization — •Patrick Froß, Denhi Martinez, Nicolas Camus, Thomas Pfeifer, and Robert Moshammer — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

Nowadays Sequential Multiphoton Ionization of H2 is mainly understood in terms of a stepwise mechanism. First the ground state molecule is ionized by removing one electron. Then eventually dissociation takes place and finally there is a chance of removing the second and last electron. We present COLTRIMS results that show that this mechanism is not correct for 35fs laser pulses with a central wavelength of 400nm (I=1· 10¹⁴ W/cm²). Our observations demonstrate that singly-excited Rydberg states play a major role in the dynamics of photoionization. In addition the underlying ionization pathway is explained.