Angular Distributions of Fragment Ions Produced by Coulomb Explosion of Simple Molecular Dications of Astrochemical Interest

The dissociative ionization and Coulomb explosion of molecular bromocyclopropane (BCP) has been experimentally investigated by time-of-flight mass spectrum and dc-slice imaging technology. The sliced 2D images, kinetic energy releases and angular distributions of the fragment ions are obtained under the intense femtosecond laser fields (8.0 × 1013–2.0 × 1014 W/cm2). The results indicated that the low kinetic energy release (KER) components come from dissociative ionization of BCP+, while the high KER components come from Coulomb explosion of BCP2+. The chemical reaction path of BCP+ has been calculated by ab initio calculation, furthermore, the C-Br bond cleavage involved Coulomb explosion channels have been revealed, and the corresponding dehydrogenation mechanism has been confirmed.

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High resolution Coulomb explosion spectra and angular distributions of fragment ions of N 2 in a femtosecond laser field

Applied Physics B ◽

10.1007/s00340-017-6665-3 ◽

2017 ◽

Vol 123 (3) ◽

Author(s):

Mingyuan Shi ◽

Shaochuan Huang ◽

Wei Xi ◽

Zuoye Liu ◽

Hongchuan Du ◽

...

Keyword(s):

High Resolution ◽

Femtosecond Laser ◽

Laser Field ◽

Coulomb Explosion ◽

Angular Distributions ◽

Fragment Ions

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Coulomb explosion and angular distributions of the fragment ions of highly charged CO in the strong laser field

Journal of Modern Optics ◽

10.1080/09500340.2021.1873444 ◽

2021 ◽

Vol 68 (1) ◽

pp. 10-18

Author(s):

Guoqiang Shi ◽

Yulin Xiang ◽

Pingquan Wang ◽

Zexuan Wang ◽

Shaohua Sun ◽

...

Keyword(s):

Laser Field ◽

Coulomb Explosion ◽

Angular Distributions ◽

Strong Laser Field ◽

Strong Laser ◽

Fragment Ions

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The angular distributions of fragment ions from labelled and unlabelled N2O in intense laser fields

Journal of Physics B Atomic Molecular and Optical Physics ◽

10.1088/0953-4075/33/18/325 ◽

2000 ◽

Vol 33 (18) ◽

pp. 3779-3794 ◽

Cited By ~ 15

Author(s):

P Graham ◽

K W D Ledingham ◽

R P Singhal ◽

T McCanny ◽

S M Hankin ◽

...

Keyword(s):

Intense Laser ◽

Angular Distributions ◽

Intense Laser Fields ◽

Laser Fields ◽

Fragment Ions

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Angular distributions of fragment ions arising from tetrahedral CH3I and isomer identification using intense laser fields

Laser and Particle Beams ◽

10.1017/s0263034601192037 ◽

2001 ◽

Vol 19 (2) ◽

pp. 187-193 ◽

Cited By ~ 1

Author(s):

P. GRAHAM ◽

K.W.D. LEDINGHAM ◽

R.P. SINGHAL ◽

S.M. HANKIN ◽

T. MCCANNY ◽

...

Keyword(s):

Polarized Light ◽

Molecular Ions ◽

Intense Laser ◽

Angular Distributions ◽

Laser Mass Spectrometry ◽

Intense Laser Fields ◽

Fragment Ions ◽

Wide Range ◽

Linearly Polarized ◽

Fs Laser

Utilizing an ultraintense (1016 W cm−2) fs laser, the laser/matter interaction of the tetrahedral CH3I molecule is investigated. A mass spectrum and the angular distributions of fragment ions arising from Coulomb explosion of molecular ions, obtained with linearly polarized light, are presented. The distributions for In+ (n ≤ 7), CHm+ (m ≤ 3), Cp+ (p ≤ 4) and H+ ions are all anisotropic and maximal when the polarization lies along the spectrometer axis. The molecule hence seems to behave as a diatomic, with the fragment ions being ejected along the field direction. Also presented are mass spectra of the isomers 1- and 2-nitropropane, which are explosive species, taken for horizontal and vertical polarizations at both 375 and 750 nm. It is shown that femtosecond laser mass spectrometry (FLMS) can be used to distinguish between these two isomers through their differing dissociation patterns. Isomer identification is important for many different applications and FLMS may provide a means of achieving this for a wide range of molecules.

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Angular Distribution of Hydrogen Fragment Ions in H+ - H2 Collisions

Australian Journal of Physics ◽

10.1071/ph99021 ◽

1999 ◽

Vol 52 (3) ◽

pp. 537

Author(s):

Bärbel Siegmann ◽

Rainer Hippler

Keyword(s):

Angular Distribution ◽

Energy Range ◽

Electron Capture ◽

Angular Distributions ◽

Fragment Ions ◽

H2 Molecule

The angular distribution of H+ fragment ions produced in 5–25 keV H+–H2 collisions was investigated in coincidence with Lyman-α photons. The observed photons arise from electron capture to the projectile H(2p) state and/or from the fragmentation of the H2 molecule via 2sσg, 2pσu or 2pΠ u states of the excited H+2* ion. An analysis of the measured angular distributions has been performed to distinguish the separate degenerate channels available to an emitted Lyman-α photon. The results show similarities to the data of Lindsay et al. (1987) who measured the non-coincident angular distribution of H+ fragment ions within the same energy range.

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