State-to-state differential and relative integral cross sections for rotationally inelastic scattering of H2O by
C-H Yang1, G Sarma, D H Parker
1Radboud University Nijmegen, Institute for Molecules and Materials, Nijmegen, The Netherlands.
Abstract:
State-to-state differential cross sections (DCSs) for rotationally inelastic scattering of H(2)O by H(2) have been measured at 71.2 meV (574 cm(-1)) and 44.8 meV (361 cm(-1)) collision energy using crossed molecular beams combined with velocity map imaging. A molecular beam containing variable compositions of the (J = 0, 1, 2) rotational states of hydrogen collides with a molecular beam of argon seeded with water vapor that is cooled by supersonic expansion to its lowest para or ortho rotational levels (J(KaKc) = 0(00) and 1(01), respectively). Angular speed distributions of fully specified rotationally excited final states are obtained using velocity map imaging. Relative integral cross sections are obtained by integrating the DCSs taken with the same experimental conditions. Experimental state-specific DCSs are compared with predictions from fully quantum scattering calculations on the most complete H(2)O-H(2) potential energy surface. Comparison of relative total cross sections and state-specific DCSs show excellent agreement with theory in almost all details.
More Related Videos
08:48High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water
Published on: April 28, 2022
14:11Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
Published on: March 29, 2016
Related Concept Videos
Hess's Law
State Function, Exact and Inexact Differentials
Elastic Strain Energy for Shearing Stresses
Generalized Hooke's Law
¹H NMR of Labile Protons: Deuterium (²H) Substitution
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
