Laser double resonance measurements of rotational energy transfer rates in HF(η = 2)

Copeland, Richard A.; Pearson, D. J.; Crim, F. Fleming

doi:10.1016/0009-2614(81)80459-9

Cited by 29 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CSA–NNCC approach has already been successfully applied to H 2 –H 2 /HD, H 2 –HF, , D 2 –HF, and HF–HF systems. As pointed out by corresponding experiments, ,− the vibrational energy transfers are much more inefficient than the rotational ones. Therefore, only dynamics for rotational energy transfer processes on the vibrational ground state were investigated in this work by using the CSA–NNCC approach based on our recently developed 6D PES.…”

Section: Introductionmentioning

confidence: 86%

Quantum Dynamics of Rotational Energy Transfer Processes for N₂–HF and N₂–DF Systems

2020

View full text Add to dashboard Cite

The rate coefficients of rotationally inelastic collision processes for N2–HF as well as N2–DF systems were calculated by applying the recently developed coupled-states approximation including the nearest neighbor Coriolis couplings approach, based on the full-dimensional ab initio intermolecular potential energy surface. It was found that the energy gap law governs these energy transfer processes. For rotational quenching of N2 (j 1 = 2–10) by the ground rotational state of HF, j 1 = 6 and 5 have the maximum quenching rate for ortho-N2 and para-N2, respectively. Quenching rate coefficients for initially excited HF and DF (j 2 = 1) in collisions with N2 were also reported, where N2–DF has a larger quenching rate than N2–HF due to larger density of states of the N2–DF system.

show abstract

Section: Introductionmentioning

confidence: 86%

Quantum Dynamics of Rotational Energy Transfer Processes for N₂–HF and N₂–DF Systems

2020

View full text Add to dashboard Cite

show abstract

“…5,6 While the experiments agree well for low rotational and vibrational states of HF, the techniques for measurement of collision cross sections in vibrationally excited HFϩAr meet with certain difficulties leading sometimes to controversial results. For example, Barnes et al 7 have reported that rotational energy transfer in ArϩHF(vϭ1) and HF(vϭ2) collisions is essentially independent of the initial vibrational state, whereas the results of Copeland et al, 8 who measured rotational relaxation of HF(vϭ2) by Ar, have arrived at rates that are only half those obtained by Hinchen and Hobbs 9 for the vϭ1 state of HF. At the same time, BelBruno and co-workers 10 have inverted the argon-broadened HF infrared linewidths to obtain rate constants for rotational energy transfer in the vϭ0,1,2 states of HF.…”

Section: Introductionmentioning

confidence: 97%

Vibrational and rotational energy transfer in collisions of vibrationally excited HF molecules with Ar atoms

Krems

Nordholm

2001

The Journal of Chemical Physics

View full text Add to dashboard Cite

The Ar-HCl potential energy surface from a global map-facilitated inversion of state-to-state rotationally resolved differential scattering cross sections and rovibrational spectral data This work presents converged vibrational close coupling-rotational coupled states calculations of cross sections and rate constants for rotational and vibrational transitions in collisions of vibrationally excited HF molecules with Ar atoms. Reduced channel basis sets assuming both a lower and an upper cutoff in vibrational quantum number are used for calculations at high internal energies of the diatomic molecule. The most recent potential energy surface is employed for the calculations and the correspondence of the results to the previous investigation of rovibrational dynamics in collisions of HF(vϭ1) with Ar is examined. It is shown that initial vibrational excitation stimulates vibrationally inelastic transitions to a great extent while the rotational energy transfer is essentially unaffected by initial v-number. The cross sections for vibrational relaxation of different vibrational levels of HF are shown to exhibit a strong dependence on initial rotational energy which is, however, of different magnitude for different vibrational states. The dependence of the vibrational relaxation of HF(vϭ1,3,6) on the translational energy of the atomic collision partner is different by an energy independent factor for different vibrational levels in the high energy limit and shows minima at low collision energies.

show abstract

The HF Dimer: Potential Energy Surface and Dynamical Processes

Truhlarl

1990

Dynamics of Polyatomic Van Der Waals Complexes

View full text Add to dashboard Cite

Laser double resonance measurements of rotational energy transfer rates in HF(η = 2)

Cited by 29 publications

References 14 publications

Quantum Dynamics of Rotational Energy Transfer Processes for N₂–HF and N₂–DF Systems

Quantum Dynamics of Rotational Energy Transfer Processes for N₂–HF and N₂–DF Systems

Vibrational and rotational energy transfer in collisions of vibrationally excited HF molecules with Ar atoms

The HF Dimer: Potential Energy Surface and Dynamical Processes

Contact Info

Product

Resources

About

Laser double resonance measurements of rotational energy transfer rates in HF(η = 2)

Cited by 29 publications

References 14 publications

Quantum Dynamics of Rotational Energy Transfer Processes for N2–HF and N2–DF Systems

Quantum Dynamics of Rotational Energy Transfer Processes for N2–HF and N2–DF Systems

Vibrational and rotational energy transfer in collisions of vibrationally excited HF molecules with Ar atoms

The HF Dimer: Potential Energy Surface and Dynamical Processes

Contact Info

Product

Resources

About

Quantum Dynamics of Rotational Energy Transfer Processes for N₂–HF and N₂–DF Systems

Quantum Dynamics of Rotational Energy Transfer Processes for N₂–HF and N₂–DF Systems