Hyperfine-Structure-Induced Depolarization of Impulsively Aligned I-2 Molecules

Esben Folger Thomas, Anders A. Sondergaard, Benjamin Shepperson, Niels Engholm Henriksen, Henrik Stapelfeldt

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Abstract

A moderately intense 450 fs laser pulse is used to create rotational wave packets in gas phase I-2 molecules. The ensuing time-dependent alignment, measured by Coulomb explosion imaging with a delayed probe pulse, exhibits the characteristic revival structures expected for rotational wave packets but also a complex nonperiodic substructure and decreasing mean alignment not observed before. A quantum mechanical model attributes the phenomena to coupling between the rotational angular momenta and the nuclear spins through the electric quadrupole interaction. The calculated alignment trace agrees very well with the experimental results.
Original languageEnglish
Article number163202
JournalPhysical Review Letters
Volume120
Issue number16
Number of pages6
ISSN0031-9007
DOIs
Publication statusPublished - 2018

Bibliographical note

High Energy Physics (HEP) papers published after January 1, 2018 in Physical Review Letters, Physical Review C, and Physical Review D are published open access, paid for centrally by SCOAP3. Library subscriptions will be modified accordingly. This arrangement will initially last for two years, up to the end of 2019.

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