Kinetic energy released in the vibrational autodetachment of sulfur hexafluoride anion

Bruno Concina (1) , Guillaume Montagne (2) , Serge Martin (2) , C. Bordas (1)

1 iLM - DYNAMO - iLM - Structure et dynamique multi-échelle des édifices moléculaires
2 iLM - SPECTROBIO - iLM - Spectrométrie des biomolécules et agrégats

The kinetic energy release distribution (KERD) in the vibrational autodetachment (VAD) from sulfur hexafluoride anion SF6- has been measured in a velocity map imaging spectrometer for delays in the range of a few tens of microseconds. The experimental KERD is analyzed within the framework of the detailed-balance: first using the standard Langevin model and subsequently using a more refined and realistic model based on the experimental attachment cross section. A discussion on the processes involved in the attachment and the VAD is presented based on an empirical fit of the attachment cross section. The lifetime derived from the model is in good agreement with the experimental time window, strengthening this theoretical approach for this model system.

Domaines: Chimie théorique et/ou physique

Bruno Concina, Guillaume Montagne, Serge Martin, C. Bordas. Kinetic energy released in the vibrational autodetachment of sulfur hexafluoride anion. Journal of Chemical Physics, 2021, 154 (23), pp.234306. ⟨10.1063/5.0054199⟩. ⟨hal-03340128⟩