A molecular clock for autoionization decay

作者：Medisauskas Lukas^*; Bello Roger Y; Palacios Alicia; Gonzalez Castrillo Alberto; Morales Felipe; Plimak Lev; Smirnova Olga; Martin Fernando; Ivanov Misha Yu

来源：Journal of Physics B: Atomic, Molecular and Optical Physics , 2017, 50(14): 144001.

DOI：10.1088/1361-6455/aa7215

• molecular clock
• autoionization
• attosecond dynamics
• coupled electronic-nuclear dynamics

The ultrafast decay of highly excited electronic states is resolved with a molecular clock technique, using the vibrational motion associated to the ionic bound states as a time-reference. We demonstrate the validity of the method in the context of autoionization of the hydrogen molecule, where nearly exact full dimensional ab-initio calculations are available. The vibrationally resolved photoionization spectrum provides a time-energy mapping of the autoionization process into the bound states that is used to fully reconstruct the decay in time. A resolution of a fraction of the vibrational period is achieved. Since no assumptions are made on the underlying coupled electron-nuclear dynamics, the reconstruction procedure can be applied to describe the general problem of the decay of highly excited states in other molecular targets.

• 出版日期2017-7-28