Bieker Helen, Onvlee Jolijn, Johny Melby, He Lanhai, Kierspel Thomas, Trippel Sebastian, Horke Daniel A, Küpper Jochen
Center for Free-Electron Laser Science , Deutsches Elektronen-Synchrotron DESY , Notkestraße 85 , 22607 Hamburg , Germany.
Department of Physics , Universität Hamburg , Luruper Chaussee 149 , 22761 Hamburg , Germany.
J Phys Chem A. 2019 Aug 29;123(34):7486-7490. doi: 10.1021/acs.jpca.9b06460. Epub 2019 Aug 14.
Spatial separation of water dimers from water monomers and larger water clusters through the electric deflector is presented. A beam of water dimers with 93% purity and a rotational temperature of 1.5 K was obtained. Following strong-field ionization using a 35 fs laser pulse with a wavelength centered around 800 nm and a peak intensity of 10 W/cm, we observed proton transfer and 46% of ionized water dimers broke apart into hydronium ions HO and neutral OH.
介绍了通过电偏转器实现水二聚体与水单体及更大水团簇的空间分离。获得了纯度为93%、转动温度为1.5 K的水二聚体束流。使用波长中心约为800 nm、峰值强度为10 W/cm²的35 fs激光脉冲进行强场电离后，我们观察到质子转移，并且46%的电离水二聚体分解为水合氢离子HO和中性OH。
