A5045289713- Advanced Chemical Physics Studies
- Mass Spectrometry Techniques and Applications
- Spectroscopy and Laser Applications
- Atomic and Molecular Physics
- Spectroscopy and Quantum Chemical Studies
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Atmospheric chemistry and aerosols
- Phase Equilibria and Thermodynamics
- Atmospheric Ozone and Climate
- Laser-Matter Interactions and Applications
- Face recognition and analysis
- Facial Nerve Paralysis Treatment and Research
- Dark Matter and Cosmic Phenomena
- Ion-surface interactions and analysis
- Quantum optics and atomic interactions
Hefei National Center for Physical Sciences at Nanoscale
2018-2024
University of Science and Technology of China
2014-2024
Hangzhou Normal University
2019
Zhejiang Normal University
2019
Southern University of Science and Technology
2019
Dalian Institute of Chemical Physics
2019
Chinese Academy of Sciences
2019
Collaborative Innovation Center of Chemistry for Energy Materials
2017-2018
Pinpointing the role of geometric phase During chemical reactions, electrons usually rearrange more quickly than nuclei. Thus, theorists often adopt an adiabatic framework that considers vibrational and rotational dynamics within single electronic states. Near regime where two states intersect, get complicated, a factor is introduced to maintain simplifying power treatment. Yuan et al. conducted precise experimental measurements validate this approach. They studied elementary H + HD reaction...
Abstract It has long been known that there is a conical intersection (CI) between the ground and first excited electronic state in H 3 system. Its associated geometric phase (GP) effect theoretically predicted to exist below CI since time. However, experimental evidence not established yet its dynamical origin waiting be elucidated. Here we report combined crossed molecular beam quantum reactive scattering dynamics study of H+HD → 2 +D reaction at 2.28 eV, which well CI. The GP clearly...
The effect of electron spin-orbit interactions on chemical reaction dynamics has been a topic much research interest. Here we report combined experimental and theoretical study the spin orbital angular momentum in F + HD → HF D reaction. Using high-resolution imaging technique, observed peculiar horseshoe-shaped pattern product rotational-state-resolved differential cross sections around forward-scattering direction. unusual could only be explained properly by highly accurate quantum theory...
We study the vacuum ultraviolet (VUV) photodissociation dynamics of carbonyl sulfide (OCS) by using time sliced velocity map ion imaging technique. Experimental images dissociative O (3PJ=0,1,2) products were acquired at five VUV photolysis wavelengths from 133.26 to 139.96 nm that correspond F Rydberg state OCS. High vibrational states carbon monosulfide (CS) co-products are partially resolved in images. The product total kinetic energy releases, angular distributions, and branching ratios...
The identification and analysis of quantum state-specific effects can significantly deepen our understanding detailed photodissociation dynamics. Here, we report an experimental investigation on the vibrational state-mediated OCS+ cation via A2Π1/2 (ν1 0 ν3) states by using velocity map ion imaging technique over photolysis wavelength range 263–294 nm. It was found that electronically excited S+ product channel S+(2Du) + CO (X1Σ+) enhanced when ν1 ν3 modes were excited. Clear deviations in...
High-resolution state-resolved differential cross sections (DCSs) are of great importance in understanding quantum reaction dynamics, and they the most detailed observables that can be experimentally measured. Here we report a synergic crossed molecular beam dynamics study on H + D2 reaction. With time-sliced velocity map ion imaging (VMI) technique near-threshold ionization scheme, acquired product rovibrational DCSs (v = 0, j 0) → HD (v′, j′) D at collision energy 1.42 eV. For products...
The H+H2 reaction is the simplest chemical system and has long been prototype model in study of dynamics. Here we report a high resolution experimental investigation state-to-state dynamics H+HD→H2+D by using crossed molecular beams method velocity map ion imaging technique at collision energy 1.17 eV. D atom products this were probed near threshold 1+1′ (vacuum ultraviolet+ultraviolet) laser ionization scheme. image with both angular acquired. State-to-state differential cross sections was...
We study the H+CH4/CD4→H2/HD+CH3/CD3 reactions using time sliced velocity map ion imaging technique. Ion images of CH3/CD3 products were measured by (2+1) resonance enhanced multi-photon ionization (REMPI) detection method. Besides in ground state, vibrationally excited also observed at two collision energies 0.72 and 1.06 eV. It is shown that angular distribution states gradually vary from backward scattering to sideways as energy increases. Compared tend be more scattered, indicating...
Understanding kinetic isotope effects is important in the study of reaction dynamics elementary chemical reactions, particularly those involving hydrogen atoms and molecules. As one isotopic variants exchange reaction, D +
The development of the velocity map ion imaging (VMI) technique has greatly advanced study photodissociation dynamics. high-resolution allows for acquisition precise and detailed information on fragments. This can further provide more insight into energy partition potential pathways involved in process. In this study, we report investigation OCS
We report a high-resolution crossed molecular beam experiment investigating the reaction dynamics of F + CH
The photodissociation dynamics of the hydrogen sulfide cation (H2S+) (X2B1) were investigated using time-sliced velocity map ion imaging technique. S+ (4Su) product images measured at four photolysis wavelengths around 393.70 nm, corresponding to excitation H2S+ A2A1 (0, 8, 0) state. raw and derived total kinetic energy releases (TKERs) spectra exhibited partial rotational resolution for H2 products. A sensitive dependence on wavelength was observed in TKER anisotropy parameters. Within a...
Time-sliced velocity map ion imaging (VMI) experiments were performed to investigate the photodissociation of H2S+X2B1, via excitation A2A1 (0, 11, 0) state. Experimental images S+ (4Su) products recorded near 349.60 nm for K = 1 band, and 344.30 2 band. The derived product total kinetic energy release (TKER) spectra exhibit partially rotationally resolved structures corresponding H2(X1Σg+) co-products. observed state angular distributions both sensitive dependence on photolysis wavelength...
As the simplest neutral triatomic reaction system, H+H2 bimolecular and its isotope variants are critically important for understanding elementary chemical reactions at microscopic level. A high-resolution crossed molecular beams method was used in this work to explore H+HD→H2+D a collision energy of 2.20 eV. The product D atoms were detected using 1+1′ (vacuum ultraviolet laser) D-atom near-threshold ionization technique. Differential cross sections with vibrational rotational state...
By using the 1 + 1' near-threshold ionization velocity map ion imaging technique, state-to-state reactive differential cross sections have been measured for H HD → H2 D reaction. High-resolution images of products, with rotational states co-products clearly resolved, were acquired at collision energies 0.60 and 1.26 eV, respectively. It is found that angular distribution predominantly backward-scattering energy eV. However, where higher, becomes forward-backward-scattering. Notably, both...