D. G. Poydashev, O. S. Ablyasova, E. A. Ryabov, “Dynamics of photoreactions in (CF$_3$I)$_n$Xe$_m$ mixed clusters exposed to femtosecond ultraviolet radiation inducing multiphoton ionization”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2022, Volume 115, Issue 9,Pages 571

OPTICS AND NUCLEAR PHYSICS

Dynamics of photoreactions in (CF$_3$I)$_n$Xe$_m$ mixed clusters exposed to femtosecond ultraviolet radiation inducing multiphoton ionization

D. G. Poydashev^a, O. S. Ablyasova^bac, E. A. Ryabov^a

^a Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, 108840 Russia
^b Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, 79104 Freiburg, Germany
^c Abteilung Hochempfindliche Röntgenspektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany

Abstract: The multiphoton ionization of (CF$_3$I)$_n$Xe$_m$ mixed clusters formed at the outflow of a mixture of CF$_3$I and Xe from an ultrasonic pulsed nozzle by femtosecond ultraviolet radiation ($\lambda= 266$ nm) has been studied. The formation of XeI$^+$ mixed ions and I$_2^+$ ions in intracluster reactions has been detected. It has been shown that the efficiency of the formation of XeI$^+$ ions significantly depends on the duration of a laser pulse: ultraviolet picosecond radiation is necessary for their formation. The kinetic yield curves of the XeI$^+$ and I$_2^+$ ions upon ultraviolet multiphoton ionization of (CF$_3$I)$_n$Xe$_m$ mixed clusters have been measured. The characteristic times of their formation determined from these curves are $(53\pm 8)$ ps and $(65\pm 6)$ ps, respectively.

Received: 22.03.2022
Revised: 29.03.2022
Accepted: 29.03.2022

DOI: 10.31857/S123456782209004X