Molecular Orbital Imaging of the Acetone<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>S</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>Excited State Using Time-Resolved (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>e</mml:mi></mml:math>,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>2</mml:mn><mml:mi>e</mml:mi></mml:mrow></mml:math>) Electron Momentum Spectro

Yamazaki, Masakazu; Oishi, Keiya; Nakazawa, Hiroyuki; Zhu, Chaoyuan; Takahashi, Masahiko

doi:10.1103/physrevlett.114.103005

Cited by 25 publications

(8 citation statements)

References 21 publications

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“…On the other hand, the recent advances in ultrashort electron pulses allowing one to achieve 4D electron diffraction3456 as well as 4D electron microscopy4647. The most recent work4849 also demonstrated the feasibility of time-resolved EMS measurements of short-lived transient species, where an ultrashort photon pulse is used for exciting the dynamics of interest and an ultrashort electron pulse is applied to probe the system as a function of the delay time between them. Therefore, by employing the new approach of the present work as well as ultrashort electron pulses, EMS has the potential to apply to ultrafast imaging of the molecular dynamics by exploring not only the change of electron densities but also the change of molecular structures for transient species.…”

Section: Discussionmentioning

confidence: 99%

Imaging molecular geometry with electron momentum spectroscopy

Wang

Shan

Tian

et al. 2016

Sci Rep

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Electron momentum spectroscopy is a unique tool for imaging orbital-specific electron density of molecule in momentum space. However, the molecular geometry information is usually veiled due to the single-centered character of momentum space wavefunction of molecular orbital (MO). Here we demonstrate the retrieval of interatomic distances from the multicenter interference effect revealed in the ratios of electron momentum profiles between two MOs with symmetric and anti-symmetric characters. A very sensitive dependence of the oscillation period on interatomic distance is observed, which is used to determine F-F distance in CF4 and O-O distance in CO2 with sub-Ångström precision. Thus, using one spectrometer, and in one measurement, the electron density distributions of MOs and the molecular geometry information can be obtained simultaneously. Our approach provides a new robust tool for imaging molecules with high precision and has potential to apply to ultrafast imaging of molecular dynamics if combined with ultrashort electron pulses in the future.

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Section: Discussionmentioning

confidence: 99%

Imaging molecular geometry with electron momentum spectroscopy

Wang

Shan

Tian

et al. 2016

Sci Rep

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“…Recent advances in electron sources have recently lead to ultrafast time-resolved electron scattering experiments [29,30], however direct time-resolved studies of a transient metastable anion formed by electron attachment remain experimentally intractable due the very short timescales of single molecule dissociation that demand even higher time resolution. Considerable technical challenges remain that must be overcome to produce and transport low energy electrons with a pulse duration less than ∼100 fs [29,30,31,32]. On the other hand, the experimental approaches that interrogate the final states following DEA can lend much insight into these dynamics.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Ion-momentum imaging of dissociative attachment of electrons to molecules

Slaughter¹,

Belkacem²,

McCurdy³

et al. 2016

J. Phys. B: At. Mol. Opt. Phys.

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We present an overview of experiments and theory relevant to dissociative electron attachment studied by momentum imaging. We describe several key examples of characteristic transient anion dynamics in the form of small polyatomic electron-molecule systems. In each of these examples the socalled axial recoil approximation is found to break down due to correlation of the electronic and nuclear degrees of freedom of the transient anion. Guided by anion fragment momentum measurements and predictions of the electron scattering attachment probability in the molecular frame, we demonstrate that accurate predictions of the dissociation dynamics can be achieved without a detailed investigation of the surface topology of the relevant electronic states or the fragment trajectories on those surfaces.

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“…С техникой расчетов, результаты которых в настоящее время используются при подготовке первых экспериментов с использованием ЭИС в присутствии лазерного поля, можно ознакомиться в указанных работах. Сама установка создается в Университете Тохоку (Сендай, Япония) [21], [22].…”

Section: стационарная теория квазиупругих (E 2e)-процессовunclassified

Theory of quasielastic atomic reactions in the presence of an alternating electric field

Попов¹,

Popov²,

Кузаков³

et al. 2016

TMF

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Для квазиупругих (e, 2e)-атомных реакций в присутствии стоячей электромагнитной волны предлагается вариант теории, которая строится по аналогии со стационарным случаем. Попутно формулируются математические проблемы, которые требуют своего решения для строгого обоснования данной теории. Ключевые слова: квазиупругие (e, 2e)-реакции, переменное электромагнитное поле.

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Molecular Orbital Imaging of the AcetoneS2Excited State Using Time-Resolved (e,2e) Electron Momentum Spectro

Cited by 25 publications

References 21 publications

Imaging molecular geometry with electron momentum spectroscopy

Imaging molecular geometry with electron momentum spectroscopy

Ion-momentum imaging of dissociative attachment of electrons to molecules

Theory of quasielastic atomic reactions in the presence of an alternating electric field

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