Electron impact ionization and dissociation of CO2+to C+and O+

Bahati, EM; Jureta, Jozo; Belić, D.; Rachafi, S.; Defrance, Pierre

doi:10.1088/0953-4075/34/9/312

Cited by 16 publications

(13 citation statements)

References 36 publications

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“…At 2 × 10 14 Wcm −2 this resulted in E r 1350 ≈ 109 eV compared to E r 800 ≈ 38 eV at 800 nm. Via crossed beam experiments, the maximum cross section for electron-CO + 2 collisions has been found at an electron energy of about 130 eV [229]. As the recollision energies present in this experiment are of the same order, one may thus conclude that the above approximation is valid.…”

Section: Discussionsupporting

confidence: 54%

Resolving Strong Field Dynamics in Cation States of CO_2 via Optimised Molecular Alignment

Oppermann

2014

Springer Theses

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In this thesis, the role of the molecular structure in strong field induced processes in CO 2 is resolved by the use of optimised impulsive molecular alignment. Two processes were investigated: recollision induced ionisation and the dissociation of the molecular ion CO + 2 . Both processes are driven by the initial tunneling ionisation of CO 2 . Through the use of molecular alignment, the orbital symmetries of the involved molecular ionic states were resolved, revealing the internal molecular dynamics in the form of ionisation and excitation pathways.A novel data analysis procedure was developed to extract the alignment distribution and rotational temperature of the impulsively aligned molecular ensemble. This facilitated the optimisation of molecular alignment in mixed gas samples and was demonstrated for N 2 , O 2 and CO 2 seeded in Ar.The recollision induced or nonsequential double ionisation (NSDI) of CO 2 was then studied in the molecular frame. The process was fully characterised by measuring the shape of the recolliding electron wavepacket and the angularly resolved inelastic electronion recollision cross section. The results reveal the contribution from both the ionic ground and first excited state of CO + 2 to the NSDI mechanism. This study was extended to the strong field induced dissociation of impulsively aligned CO + 2 . It was found that dissociation is driven by a parallel dipole transition from the second excited ionic state B to the predissociating state C, whilst recollision excitation was shown to not play a role. The strong field induced coupling of the ionic states B and C could thus be controlled by the laser polarisation.The results obtained in this thesis further the understanding of population dynamics of cation states in strong field processes. This is of special interest for extending molecular strong field physics to the study of electronic degrees of freedom and their coupling to the nuclear motion. had hoped for in a research degree and I cannot thank Jon enough for making it such an enriching experience, both professionally and personally.

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Section: Discussionsupporting

confidence: 54%

Resolving Strong Field Dynamics in Cation States of CO_2 via Optimised Molecular Alignment

Oppermann

2014

Springer Theses

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“…. References on dissociative processes have appeared for: H + 2 (Neau et al 2002, Krasheninnikov 2002, Pigarov 2002, Takagi 2002, Strasser et al 2002b, Florescu et al 2003, Abdellahi El Ghazaly et al 2004, H + 3 (Krasheninnikov 2002, Glosik et al 2001, Strasser et al 2002a, McCall et al 2004, Royal, Larson & Orel 2004, Kalhori et al 2004, HeH + (Royal, Larson & Orel 2004, Takagi 2004, H 2 O + (Thomas et al 2002), CH + (Bannister et al 2003), CH + 4 (Janev 2002), C 2 H + 2 (Derkatch, Minaev & Larsson 2003), C 2 H + 4 (Janev 2002), 2 H + 6 (Janev 2002), C 3 H + 8 (Janev 2002), CO + 2 (Bahati et al 2001a, Seiersen et al 2003, N + 2 (Bahati, E. M. et al 2001b), and SO + 2 (Geppert et al 2004). New reports of results for ionization include: H + 2 (Serov et al 2002), H + 3 , hydrocarbon ions (Janev & Reiter 2003 -…”

Section: Electron-molecular-ion Scatteringmentioning

confidence: 99%

“…Atomic & Molecular Data 357 C 3 H + 7 , C 3 H + 8 ), CO + 2 (Bahati et al 2001a, Deutsch et al 2002, and N + 2 (Deutsch et al 2002, Bahati et al 2001b.…”

Section: Electron-molecular-ion Scatteringmentioning

confidence: 99%

Commission 14: Atomic & Molecular Data

Federman¹,

Adelman²,

Biémont³

et al. 2005

Proc. IAU

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“…Many experimental measurements of the KER cross sections have been used to extract scattering cross sections [8][9][10][11][12][13][14][15][16][17][18], identify dissociative processes [8][9][10][11][12][13][14][15][16][17][18], and to determine experimental conditions [18][19][20], molecular structure [21,22] and collision dynamics [21]. The KER cross sections can be extracted from a complete close-coupling calculation that includes all degrees of freedom (electronic, vibrational, and rotational).…”

Section: Introductionmentioning

confidence: 99%

Kinetic-energy release of fragments from electron-impact dissociation of the molecular hydrogen ion and its isotopologues

et al. 2017

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We calculate the kinetic energy release distributions of fragments produced for electron-impact dissociation of the vibrationally excited molecular hydrogen ion H + 2 and its isotopologues D + 2 and T + 2 . Here we apply the adiabatic-nuclei convergent close-coupling method and compare results with several different methods, including the delta approximation. Results are presented for a number of dissociative excitation transitions and dissociative ionization as a function of the initial vibrational state of the molecule. We confirm that the "square root" approximation is a good approximation for the adiabatic-nuclei kinetic energy release cross sections of H + 2 . Agreement with experiment, where available, is good.

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Electron impact ionization and dissociation of CO₂⁺to C⁺and O⁺

Cited by 16 publications

References 36 publications

Resolving Strong Field Dynamics in Cation States of CO_2 via Optimised Molecular Alignment

Resolving Strong Field Dynamics in Cation States of CO_2 via Optimised Molecular Alignment

Commission 14: Atomic & Molecular Data

Kinetic-energy release of fragments from electron-impact dissociation of the molecular hydrogen ion and its isotopologues

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