Abstract
The authors perform multi-reflection time-of-flight mass spectrometry of time-resolved photodissociation of indium clusters and observe a power-law exponent of the decay rate links cluster dissociation energy and ensemble temperature.
Highlights
Delayed reactions offer fascinating approaches to the behavior and properties of nanoparticles [1]
One of the most intriguing discoveries is the fact that the decay rate of cluster ensembles with broad distributions of internal energies shows a power-law behavior in time, R(t ) = R0 t p, with initial rate R0 and exponent p [13,14,15,16,17,18,19,20]
The power-law exponent is affected by the energy distribution and the ion production [22]
Summary
Delayed reactions offer fascinating approaches to the behavior and properties of nanoparticles [1]. Neutrals resulting from fragmentation or electron detachment traverse the mirror potentials and can be used to track the decay of excited ions revolving between the mirrors [16,20,30,31] This enables the recording of decay rates over time from a single injected particle bunch. The MR-ToF mass spectrometers’ larger siblings, analogous studies succeeded in resolving low-lying rotational states and monitoring their long-term cooling behavior [32,33]. For these studies, the storage devices have been operated in “nonbunching mode,” i.e., purely as electrostatic traps.
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