Jankowski A, Fischer P, Hansen K, Schweikhard L. Delayed photodissociation of the tin cluster Sn
22.
Phys Chem Chem Phys 2024;
26:1105-1112. [PMID:
38098439 DOI:
10.1039/d3cp04476a]
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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, indicative of 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.
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