Quantum-state-sensitive detection of alkali dimers on helium nanodroplets by laser-induced Coulomb explosion

Henrik Høj Kristensen, Lorenz Kranabetter, Constant Alexandre Schouder, Christoph Stapper, Jacqueline Arlt, Marcel Mudrich, Henrik Stapelfeldt

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Abstract

Rubidium dimers residing on the surface of He nanodroplets are doubly ionized by an intense femtosecond laser pulse leading to fragmentation into a pair of Rb+ ions. We show that the kinetic energy of the Rb+ fragment ions can be used to identify dimers formed in either the X ςg+1 ground state or in the lowest-lying triplet state, a ςu+3. From the experiment, we estimate the abundance ratio of dimers in the a and X states as a function of the mean droplet size and find values between 4∶1 and 5∶1. Our technique applies generally to dimers and trimers of alkali atoms, here also demonstrated for Li2, Na2, and K2, and will enable femtosecond time-resolved measurements of their rotational and vibrational dynamics, possibly with atomic structural resolution.

Original languageEnglish
Article number093201
JournalPhysical Review Letters
Volume128
Issue9
ISSN0031-9007
DOIs
Publication statusPublished - Mar 2022

Fingerprint

Dive into the research topics of 'Quantum-state-sensitive detection of alkali dimers on helium nanodroplets by laser-induced Coulomb explosion'. Together they form a unique fingerprint.

Cite this