Coulombic and pre-Coulombic geometry evolution of carbonyl sulfide in an intense femtosecond laser pulse, determined by momentum imaging

Sanderson, Joseph; Goodworth, T. R. J.; El-Zein, A.A.A.; Bryan, William A.; Newell, W R; Langley, A. J.; Taday, Philip F.

doi:10.1103/physreva.65.043403

Cited by 30 publications

(44 citation statements)

References 14 publications

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“…There have been a number of previous studies of the fragmentation dynamics in OCS following strong-field multiple ionization [42,[89][90][91][92][93], as well as similar studies using single photon, [8,90,[94][95][96][97][98], ion [99,100] and electron impact [101]. Many of these studies examined three-body breakup and did not focus on the bond rearrangement channel leading to SO + formation.…”

Section: Resultsmentioning

confidence: 99%

Strong-field-induced bond rearrangement in triatomic molecules

et al. 2019

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A comparative study of bond rearrangement is reported for the double ionization of three triatomic molecules: carbon dioxide, carbonyl sulfide, and water (D2O). Specifically we study the formation of the molecular cation AC + from the edge atoms of a triatomic molecular dication ABC 2+ following double ionization by intense, short (23 fs, 790 nm) laser pulses. The comparison is made using the double ionization branching ratio of each molecule, thereby minimizing differences due to differing ionization rates. The rearrangement branching ratio is highest for water, which has a bent initial geometry, while CO2 and OCS are linear molecules. The angular distribution of O + 2 fragments arising from CO2 is essentially isotropic, while SO + from OCS and D + 2 from D2O are aligned with the laser polarization. In the CO2 and D2O cases, the angular distributions of the bond rearrangement channels are different from the angular distributions of the dominant dissociative double ionization channels CO + + O + and OD + + D + . Only the angular distribution of SO + from OCS is both aligned with the laser polarization and similar to the angular distribution of the largest dissociative channel, CO + + S + . The mixed behavior observed from the angular distributions of the different molecules stands in contrast to the relative consistency of the magnitude of the bond rearrangement branching ratio.I.

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Section: Resultsmentioning

confidence: 99%

Strong-field-induced bond rearrangement in triatomic molecules

et al. 2019

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“…The length gauge, pulses with a cosine envelope, a total length of 6.6 fs, and maximal intensities of As in experiments [13,14], it is found that the O−C bond is stronger than the C−S bond, and that both bonds often strongly increase after an interaction with a laser pulse.…”

Section: Methodsmentioning

confidence: 99%

Carbonyl sulphide under strong laser field: Time-dependent density functional theory

Bilalbegović

2008

Eur. Phys. J. D

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To be published in The European Physical Journal D Abstract. The first 52 fs of a time evolution of the electron density in OCS after an interaction with an intense sub 10 fs laser pulse are studied using the time-dependent density functional theory. The nuclear motion in this linear trimer is simulated by the classical molecular dynamics method. Laser fields of intensity 10 13 W/cm 2 and 10 15 W/cm 2 are used. Details of the laser induced changes of the structure, as well as the ionization rate are sensitive to the applied field intensity and its polarization. It is found that under suitable conditions the OCS molecule bends soon after an interaction with a laser pulse. A deviation from the linear geometry of up to 23.6• and charged ions of up to +3 are observed. The time evolution of electric dipole moments and the time-dependent electron localization function (ELF) are also studied.

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“…A deformation along the bending coordinates before a Coulomb explosion has been found for carbon dioxide, which has a linear structure in the neutral state [15]. However, most of the molecules examined in this context have been two-or three-atom molecules such as CO 2 [15], SO 2 [18], and SCO [19].…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Coulomb explosion of acetylene and diacetylene derivatives

Mitsubayashi

Yatsuhashi

Tanaka

et al. 2016

International Journal of Mass Spectrometry

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We investigated the significant differences in the angular distribution of carbon ions ejected from dimethylacetylenes (CH 3-C≡C-CH 3 and CH 3-C≡C-C≡C-CH 3) and diiodoacetylenes (I-C≡C-I and I-C≡C-C≡C-I) induced by a Coulomb explosion. The longest linear chain molecule ever reported was exposed to intense femtosecond laser fields (40 fs, < 5×10 14 Wcm-2) in this study. In the cases of the diiodoacetylenes, the angular distributions of the carbon ions were orthogonal with respect to the laser polarization direction and became narrower as the length of the molecules became longer. This is in sharp contrast to the dimethylacetylenes, in which the angular distributions of the carbon ions were parallel with respect to the laser polarization direction and became broader as the length of the molecules became longer. The specific angular distributions of carbon ions ejected from the diiodoacetylenes are explained in terms of the frozen molecular rotation, the blocking of carbon ion emission, and the bending of carbon chains at highly charged states due to the presence of iodines.

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Coulombic and pre-Coulombic geometry evolution of carbonyl sulfide in an intense femtosecond laser pulse, determined by momentum imaging

Cited by 30 publications

References 14 publications

Strong-field-induced bond rearrangement in triatomic molecules

Strong-field-induced bond rearrangement in triatomic molecules

Carbonyl sulphide under strong laser field: Time-dependent density functional theory

Anisotropic Coulomb explosion of acetylene and diacetylene derivatives

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