Strong-field induced fragmentation and isomerization of toluene probed by ultrafast femtosecond electron diffraction and mass spectrometry

Abstract

We investigate the fragmentation and isomerization of toluene molecules induced by strong-field ionization with a femtosecond near infrared laser pulse. Momentum-resolved coincidence time-of-flight ion mass spectrometry is used to determine...

Mapping the photochemistry of cyclopentadiene: from theory to ultrafast X-ray scattering

“…1,5,82 These scattering patterns can be particularly apt at identifying fragmentation of the target at longer times, when present. 5,83…”

“…1,5,82 These scattering patterns can be particularly apt at identifying fragmentation of the target at longer times, when present. 5,83 Fig. 8 Time-dependent percent difference scattering signals during the dynamics simulations, calculated using the independent atom model (IAM), for the total ensemble of trajectories (a), the BP trajectories (b), and the CP trajectories (c).…”

Strong-Field-Induced Coulomb Explosion Imaging of Tribromomethane

“…The data shown here were recorded with a pulse energy of 13 μJ, which resulted in a peak intensity of 6 × 10 14 W cm –2 in the interaction region, according to calibration measurement using the well-known recoil momentum profile of strong-field ionized neon atoms . The intense laser pulses interacted with CHBr 3 introduced as a supersonic molecular beam into the center of a COLd target recoil ion momentum spectrometer (COLTRIMS). ,, The ions produced in the interaction were accelerated by applying a uniform extraction field of 96.6 V cm –1 along a 240 mm long spectrometer toward a Z-stacked microchannel plate (MCP) detector equipped with an 80 mm time- and position-sensitive delay line anode. We recently upgraded our detector with efficiency enhanced “funnel MCPs”, which significantly increase the detection efficiency up to a reported 90%, thus increasing the total rate of 5-fold ion coincidences by more than 1 order of magnitude compared to previous MCPs.…”

Two- and three-body fragmentation of multiply charged tribromomethane by ultrafast laser pulses

“…A detailed description of the setup is provided in previous reports. [57][58][59] We used the linearly polarized beam of an amplified Ti:Sapphire laser, (PULSAR), 60 with a repetition rate of 10 kHz, a central wavelength of 790 nm (60 nm FWHM), and a pulse duration of 28 fs (FWHM in intensity), focused into a supersonic molecular beam by a concave spherical mirror with a focal length of 75 mm. The polarization of the laser beam was parallel to the spectrometer axis and perpendicular to the molecular beam.…”