Time-Resolved Dissociation Dynamics of lodomethane Resulting from Rydberg and Valence Excitation

被引：8

作者：

Baumann, Arne ^{[1
,2
]}

Rompotis, Dimitrios ^{[3
]}

Schepp, Oliver ^{[1
]}

Wieland, Marek ^{[1
,2
,4
]}

Drescher, Markus ^{[1
,2
,4
]}

机构：

[1] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany

[2] Hamburg Ctr Ultrafast Imaging CUI, D-22761 Hamburg, Germany

[3] Deutsches Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

[4] Ctr Free Electron Laser Sci CFEL, D-22607 Hamburg, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2018年 / 122卷 / 21期

关键词：

POTENTIAL-ENERGY SURFACES; METHYL-IODIDE; PHOTODISSOCIATION DYNAMICS; MASS-SPECTROMETRY; AB-INITIO; BAND; SPECTROSCOPY; CH3I; SPECTRA; STATES;

D O I：

10.1021/acs.jpca.8b01248

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：

Rydberg excitations in the vacuum ultraviolet spectral range may open up molecular photoreaction pathways not accessible from lower-lying valence states. Here, single-shot UV/VUV pump-probe spectroscopy was used to study the photodissociation dynamics of iodomethane after 268 nm excitation in the A-band and excitation of the 6p (E-2(3/2)) Rydberg state at 161 nm. By combining weak-field VUV single-photon ionization with sub-10 fs temporal resolution and the superior statistical accuracy of the single-shot technique, sub-30 fs wave packet dynamics upon excitation in the A-band by a UV pump pulse were disclosed. Population transfer from the Rydberg state to the 2 (1)A(1) valence state leading to 100 fs dissociation dynamics was observed by utilizing the same methodology in a VUV-pump/UV-probe scheme.

引用

页码：4779 / 4784

页数：6

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