scholarly journals Dissociative Ionization of Molecular CF2Br2 under 800 and 400 nm Intense Femtosecond Laser Fields

2021 ◽  
Vol 11 (4) ◽  
pp. 1704
Author(s):  
Botong Liu ◽  
Zhipeng Li ◽  
Haitao Sun ◽  
Zhenrong Sun ◽  
Yan Yang
Keyword(s):  
Angular Distribution ◽  
Femtosecond Laser ◽  
Excited States ◽  
Bond Cleavage ◽  
Kinetic Energy Release ◽  
Velocity Mapping ◽  
Laser Fields ◽  
Fragment Ions ◽  
Isotropic Structure ◽  
Kinetic Energy Release Distribution

The interaction between the CF2Br2 molecule and 800/400 nm intense femtosecond laser fields is investigated by direct current (dc) sliced velocity mapping imaging implementation. By analyzing the kinetic energy release distribution and angular distribution of fragment ions, the dissociation channels along C-Br bond cleavage have been determined. The isotropic structure of the angular distribution for CF2Br+ ions is attributed to the coupling between the excited states. Additionally, a unique elimination channel of CF2Br2+ → CF2 + Br2+ has been observed and identified in the case of 400 nm laser field, in which the two C-Br bonds break asynchronously.

scholarly journals Dissociative Ionization and Coulomb Explosion of Molecular Bromocyclopropane in an Intense Femtosecond Laser Field

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3096 ◽  
Author(s):  
Botong Liu ◽  
Yan Yang ◽  
Haitao Sun ◽  
Zhenrong Sun
Keyword(s):  
Kinetic Energy ◽  
Femtosecond Laser ◽  
Bond Cleavage ◽  
Kinetic Energy Release ◽  
Coulomb Explosion ◽  
Dissociative Ionization ◽  
Angular Distributions ◽  
Fragment Ions ◽  
Slice Imaging ◽  
Dehydrogenation Mechanism

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.

Kinetic energy release of diatomic and linear triatomic molecules in intense femtosecond laser fields

2004 ◽  
Vol 13 (1) ◽  
pp. 24-29 ◽  
Author(s):  
Chen Jian-Xin ◽  
Ma Ri ◽  
Ren Hai-Zhen ◽  
Li Xia ◽  
Wu Cheng-Yin ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Femtosecond Laser ◽  
Energy Release ◽  
Kinetic Energy Release ◽  
Laser Fields ◽  
Triatomic Molecules

Formation of fragment ions (H+, H3+, CH3+) from ethane in intense femtosecond laser fields – from understanding to control

2013 ◽  
Vol 163 ◽  
pp. 461 ◽  
Author(s):  
Nora Schirmel ◽  
Nicola Reusch ◽  
Philipp Horsch ◽  
Karl-Michael Weitzel
Keyword(s):  
Femtosecond Laser ◽  
Laser Fields ◽  
Fragment Ions

scholarly journals Controlling electron-ion rescattering in two-color circularly polarized femtosecond laser fields

2016 ◽  
Vol 93 (5) ◽  
Author(s):  
Christopher A. Mancuso ◽  
Daniel D. Hickstein ◽  
Kevin M. Dorney ◽  
Jennifer L. Ellis ◽  
Elvedin Hasović ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Fields ◽  
Circularly Polarized

scholarly journals Nonperturbative generation of above-threshold harmonics from pre-excited argon atoms in intense mid-infrared laser fields

2017 ◽  
Vol 5 ◽  
Author(s):  
Guihua Li ◽  
Hongqiang Xie ◽  
Ziting Li ◽  
Jinping Yao ◽  
Wei Chu ◽  
...  
Keyword(s):  
Excited State ◽  
Femtosecond Laser ◽  
Pulse Energy ◽  
Laser Pulses ◽  
Infrared Laser ◽  
Femtosecond Laser Pulses ◽  
Probe Laser ◽  
Laser Fields ◽  
Mid Infrared ◽  
Highly Nonlinear

We experimentally investigate the generation of above-threshold harmonics completely from argon atoms on an excited state using mid-infrared femtosecond laser pulses. The highly nonlinear dependences of the observed signal on the pulse energy and polarization of the probe laser pulses indicate its nonperturbative characteristic.

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