通过“关联离子与中性粒子飞行时间”方法结合“速度成像图”来测量中性碎片的速度。

Measurement of the velocity of neutral fragments by the "correlated ion and neutral time of flight" method combined with "velocity-map imaging".

作者信息

Berthias F, Feketeová L, Della Negra R, Dupasquier T, Fillol R, Abdoul-Carime H, Farizon B, Farizon M, Märk T D

机构信息

Université de Lyon, F-69003 Lyon, France; Université Lyon 1, Villeurbanne, France; and CNRS/IN2P3, UMR5822, Institut de Physique Nucléaire de Lyon, F-69622 Villeurbanne, France.

Institut für Ionenphysik und Angewandte Physik, Leopold Franzens Universität, Technikerstrasse 25, A-6020 Innsbruck, Austria.

出版信息

Rev Sci Instrum. 2017 Aug;88(8):083101. doi: 10.1063/1.4991828.

DOI:10.1063/1.4991828

PMID:28863715

Abstract

In the challenging field of imaging molecular dynamics, a novel method has been developed and implemented that allows the measurement of the velocity of neutral fragments produced in collision induced dissociation experiments on an event-by-event basis. This has been made possible by combining a correlated ion and neutral time of flight method with a velocity map imaging technique. This new method relies on a multiparametric correlated detection of the neutral and charged fragments from collision induced dissociation on one single detector. Its implementation on the DIAM device (Device for irradiation of biomolecular clusters) (Dispositif d'Irradiation d'Agrégats bioMoléculaires) allowed us to measure the velocity distribution of water molecules evaporated from collision induced dissociation of mass- and energy-selected protonated water clusters.

摘要

在具有挑战性的成像分子动力学领域，已开发并实施了一种新方法，该方法能够在逐个事件的基础上测量碰撞诱导解离实验中产生的中性碎片的速度。通过将相关离子和中性飞行时间方法与速度成像技术相结合，实现了这一点。这种新方法依赖于在单个探测器上对碰撞诱导解离产生的中性和带电碎片进行多参数相关检测。在DIAM装置（生物分子团簇辐照装置）上的实施，使我们能够测量从质量和能量选择的质子化水团簇的碰撞诱导解离中蒸发出来的水分子的速度分布。