Lifetimes and energetics of the first electronically excited states of NaH2O from time-resolved photoelectron imaging

被引：5

作者：

Gartmann, Thomas E. ^{[1
]}

Yoder, Bruce L. ^{[1
]}

Chasovskikh, Egor ^{[1
]}

Signorell, Ruth ^{[1
]}

机构：

[1] ETH, Dept Chem & Appl Biosci, Lab Phys Chem, Vladimir Prelog Weg 2, CH-8093 Zurich, Switzerland

来源：

CHEMICAL PHYSICS LETTERS | 2017年 / 683卷

关键词：

Time-resolved photoelectron spectroscopy; Angle-resolved photoelectron spectroscopy; Pump-probe femtosecond spectroscopy; Photoelectron anisotropy; Molecular clusters; Excited state dynamics; Quantum beats; DOPED WATER CLUSTERS; SOLVATED ELECTRONS; HYDRATED ELECTRON; ANGULAR-DISTRIBUTIONS; EXCESS ELECTRONS; SODIUM; SPECTROSCOPY; DYNAMICS; AMMONIA; IONIZATION;

D O I：

10.1016/j.cplett.2017.01.044

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The energetics and lifetimes of the first electronically excited states ("3p-states") of NaH2O and NaD2O have been measured by pump-probe (740/780 and 400 nm) photoelectron imaging. The photoelectron spectra of NaH2O show two bands at an electron kinetic energy of 0.14 and 0.38 eV, respectively. We assign the former to excitation via the two energetically close lying "pp-states" with flat potential curves in the intermolecular degrees of freedom, and the latter to the excitation via the "pr-state" characterized by significantly steeper potential curves. The relaxation of all "p-states" follows a double exponential decay with a lifetime around 110 ps for the dominant fast component. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：515 / 520

页数：6

共 49 条

[1] Biomolecular Damage Induced by Ionizing Radiation: The Direct and Indirect Effects of Low-Energy Electrons on DNA [J].