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Laser–Metal Interaction with a Pulse Shorter than the Ion Period: Ablation Threshold, Electron Emission and Ion Explosion
Published 2023-06-01Subjects: Get full text
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42
Post-Ionization Dynamics of the Polar Molecule OCS in Asymmetric Laser Fields
Published 2022-04-01Subjects: Get full text
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43
Studies of photoinduced molecular dynamics using ion imaging and correlation analysis
Published 2024“…A photochemical process of particular interest is the rapid multiple ionisation of a molecule in an intense laser field that causes dissociation into many fragment ions, known as a Coulomb explosion. One of the main topics of this thesis is how the laser-induced Coulomb explosion of a target molecule can be used to characterising its atomic structure, including being able to track structural change following photoexcitation.…”
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Time-resolved studies of photoinduced dynamics using fast imaging sensors
Published 2020“…The channels derived from Coulomb explosions are supported through covariance analysis. …”
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Studies of photoinduced molecular dynamics using a fast imaging sensor
Published 2013“…</p> <p>The PImMS camera is applied to laser-induced Coulomb explosion imaging (CEI) of an axially chiral substituted biphenyl molecule. …”
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Covariance imaging experiments using a pixel-imaging mass-spectrometry camera
Published 2014“…The "pixel imaging mass spectrometry" camera is used to perform femtosecond laser-induced Coulomb explosion imaging of 3,5-dibromo-3′, 5′-difluoro-4′-cyanobiphenyl molecules prealigned in space. …”
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Ionization and fragmentation dynamics of singly and multiply charged ions
Published 2018“…<p>This thesis investigates the ionization and fragmentation dynamics of gas-phase molecules, particularly those relevant to astrochemistry and of interest in velocity-map imaging experiments into the dynamics of Coulomb explosions. These two topics are covered in Part I and Part II, respectively.…”
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Pressure Welding through a Layer of Hydrocarbon Material: Electromagnetic Phenomena during the Diffusion Bonding Formation
Published 2024-03-01“…A capsule with ionized carbon particles is formed there. The ‘Coulomb explosion’ occurs in the capsule located in the middle of the joint. …”
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Interaction of nanosecond laser pulse with tetramethyl silane (Si(CH3)4) clusters: Generation of multiply charged silicon and carbon ions
Published 2011-12-01“…Present work reports significantly high levels of ionization, eventually leading to Coulomb explosion of Tetramethyl silane (TMS) clusters, on interaction with laser pulses of intensity ∼109 W/cm2. …”
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Studies of ultrafast molecular photofragmentation and dynamics using fast imaging sensors
Published 2017“…The Coulomb explosion imaging (CEI) technique and covariance analysis was extended to a femtosecond-resolved pump-probe study of the trans-cis isomerization in 4,4′-difluoroazobenzene (DFAB). …”
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51
Chemistry in Teaching<br> How does Sodium React with Water?
Published 2015-09-01“…It was found that the Coulomb explosion is a critical step in the reaction.…”
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52
Correlated ion stopping in dense plasmas
Published 2019-05-01“…The validities of the usual assumptions of equal ion fragment charge and negligible coupling between stopping and Coulomb explosion are assessed.…”
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53
Time-resolved Rayleigh scattering measurements of methane clusters for laser-cluster fusion experiments.
Published 2021-01-01“…We find that this ion temperature agrees with the predicted temperature from CD4 clusters at 50 bar with r = 14 nm assuming the Coulomb explosion model.…”
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Multiple electron trapping in the fragmentation of strongly driven molecules
Published 2012-01-01“…We present a theoretical quasi-classical study of the formation, during Coulomb explosion, of two highly excited neutral H atoms (double H*) of strongly driven H _2 . …”
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Breast cancer treatment by nanophotolysis approach
Published 2018-06-01“…Slow increase in the Coulomb explosion pressure from 0.6 × 106 Pa to 2 × 106 Pa is observed for a cluster size of range 10 nm to 20 nm. …”
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56
Echoes in Space and Time
Published 2016-12-01“…Here, we observe hitherto unreported fractional echoes of high order, spatially rotated echoes, and the counterintuitive imaginary echoes at negative times. Coincidence Coulomb explosion imaging is used for a direct spatiotemporal analysis of various molecular alignment echoes, and the implications to echo phenomena in other fields of physics are discussed.…”
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Multi-mass velocity-map imaging studies of photoinduced and electron-induced chemistry
Published 2019“…Multi-mass detection capabilities have also led to the development of two new tools for the chemical dynamics toolbox, in the form of Coulomb-explosion imaging and covariance-map imaging. These allow details of molecular structure to be followed in real time over the course of a chemical reaction, offering the tantalising prospect of recording real-time ‘molecular movies’ of chemical dynamics. …”
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Various damage mechanisms in carbon and silicon materials under femtosecond X-ray irradiation
Published 2018-01-01“…We indicate the following conditions: those producing thermal melting of targets as a result of electron-ion energy exchange; non-thermal phase transitions due to modification of the interatomic potential; Coulomb explosion due to accumulated net charge in finite-size systems; spallation or ablation at higher fluences due to detachment of sample fragments; and warm dense matter formation. …”
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Three-dimensional covariance-map imaging of molecular structure and dynamics on the ultrafast timescale
Published 2020“…Here we introduce the new technique of three-dimensional covariance-map Coulomb explosion imaging, which has the potential to provide complete three-dimensional information on molecular structure and dynamics as they evolve in real time during a gas-phase chemical reaction. …”
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60
Numerical Simulation of Highly Charged Droplets Dynamics with Primary Break-up in Electrospray at Sub Rayleigh Limit
Published 2017-01-01“…The droplet size reduction can be explained by evaporation and/or Coulomb explosion. Results show that moving downstream, the average velocity of droplets decreases monotonically. …”
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