Temperature Dependence of the Vibrational Wave-Packet Dynamics of Cu₅.

ABSTRACT: Vibrational wave-packet dynamics on the electronic ground state of the neutral copper pentamer (Cu₅) are studied by femtosecond (fs) pump-probe spectroscopy using the 'negative ion to neutral to positive ion' excitation scheme (NeNePo). A vibrational wave packet is prepared on the electronic ground state (²A₁) of Cu₅ via photodetachment of a mass-selected, cryogenically cooled Cu₅^- anion using the first fs pump pulse. The temporal evolution of the vibrational wave packet is then probed by a second ultrafast probe pulse via resonant multiphoton ionization to Cu₅⁺. A frequency analysis of the femtosecond NeNePo transients for pump-probe delay times from 0.2 to 20.0 ps reveals two primary beating frequenci

SUBMITTER: Han J 

PROVIDER: S-EPMC12670499 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature