Observation of a Freeman resonance in the femtosecond ionization of Methyl Iodide

被引：3
|
作者：
Kechaoglou, Emmanouil [1 ]
Kalaitzis, Panagiotis [1 ,2 ]
Sofikitis, Dimitris [1 ]
机构：
[1] Univ Ioannina, Dept Phys, Atom & Mol Phys Lab, Univ Campus, GR-45110 Ioannina, Greece
[2] Radboud Univ Nijmegen, Inst Mol & Mat, Heijendaalseweg 135, NL-6525 AJ Nijmegen, Netherlands
来源：
CHEMICAL PHYSICS LETTERS | 2020年 / 759卷 / 759期
关键词：
Freeman resonance; Electron VMI; Methyl Iodide; ABOVE-THRESHOLD IONIZATION; MULTIELECTRON DISSOCIATIVE IONIZATION; CH3I; PHOTODISSOCIATION; PHOTOELECTRON; ALIGNMENT; DYNAMICS; SPECTRA;
D O I：
10.1016/j.cplett.2020.137984
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：
We perform velocity map imaging in the electrons generated from the ionization of CH3I molecules at 800 nm, in the intensity range 3.1 x 10(13) W/cm(2)<= I <= 6 x 10(13) W/cm(2). The photoelectron spectra reveal a Freeman resonance at a peak intensity of approximate to 3.5 x 10(13) W/cm(2). The photoelectron kinetic energy dependence on the laser intensity, as well as the observation of the 8-th photon channel closing offers absolute intensity calibration in our experiment, which allows for the accurate determination of the ponderomotive potential induced by the laser field and ultimately the determination of the Rydberg state involved in the Freeman resonance.
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页数：6
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