Deconvoluting nonaxial recoil in Coulomb explosion measurements of molecular axis alignment

被引：24

作者：

Christensen, Lauge ^{[1
]}

Christiansen, Lars ^{[1
]}

Shepperson, Benjamin ^{[1
]}

Stapelfeldt, Henrik ^{[1
]}

机构：

[1] Aarhus Univ, Dept Chem, Langelandsgade 140, DK-8000 Aarhus C, Denmark

来源：

PHYSICAL REVIEW A | 2016年 / 94卷 / 02期

基金：

欧洲研究理事会;

关键词：

COVARIANCE DATA-ACQUISITION; STRONG LASER-PULSES; ALIGNING MOLECULES; PHOTOELECTRON; COINCIDENCE; IONIZATION; DYNAMICS; FIELDS; OXYGEN; CS2;

D O I：

10.1103/PhysRevA.94.023410

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a quantitative study of the effect of nonaxial recoil during Coulomb explosion of laser-aligned molecules and introduce a method to remove the blurring caused by nonaxial recoil in the fragment-ion angular distributions. Simulations show that nonaxial recoil affects correlations between the emission directions of fragment ions differently from the effect caused by imperfect molecular alignment. The method, based on analysis of the correlation between the emission directions of the fragment ions from Coulomb explosion, is used to deconvolute the effect of nonaxial recoil from experimental fragment angular distributions. The deconvolution method is then applied to a number of experimental data sets to correct the degree of alignment for nonaxial recoil, to select optimal Coulomb explosion channels for probing molecular alignment, and to estimate the highest degree of alignment that can be observed from selected Coulomb explosion channels.

引用

页数：10

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