Phys Chem Chem Phys, 26, 1105 (2024)
Delayed Photodissociation of the Tin Cluster Sn22-
Alexander Jankowski1,*, Paul Fischer1, Klavs Hansen2 and Lutz Schweikharda1
1 Institute for Physics, University of Greifswald, Felix-Hausdorff-Straße 6, 17498 Greifswald, Germany
2 Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, 92 Weijin Road, Tianjin 300072, China
* alexander.jankowski@uni-greifswald.de
Abstract
Millisecond-delayed photodissociation of gas-phase Sn22 clusters stored in a Penning trap is investigated as a function of excitation energy. Sn15 is the only significant charged fragment, indicativeof the break-off of neutral heptamers. Fits of the time-resolved fragmentation require a distribution of decay constants, caused by the finite width of the internal energy distribution of the cluster ensemble prior to photoexcitation. A lower limit for the dissociation energy for the loss of Sn7 is determined to be 2.1(1) eV, a factor of two above literature quantum chemical calculations.
