Exit-channel recoil resonances by imaging the photodissociation of single quantum-state-selected OCS molecules
| Autor: | J. Suárez, Johan A. Schmidt, Dimitris Sofikitis, T. Peter Rakitzis, Maurice H. M. Janssen, Stavros C. Farantos |
|---|---|
| Přispěvatelé: | AIMMS, Physical Chemistry, Photo Conversion Materials, LaserLaB - Analytical Chemistry and Spectroscopy |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Period (periodic table) Photodissociation Resonance 02 engineering and technology Bending 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Recoil Quantum state Molecule SDG 7 - Affordable and Clean Energy Atomic physics Physics::Chemical Physics 0210 nano-technology Quantum |
| Zdroj: | Physical Review A, 98(3):033417, 1-11. American Physical Society Sofikitis, D, Suarez, J, Schmidt, J A, Rakitzis, T P, Farantos, S C & Janssen, M H M 2018, ' Exit-channel recoil resonances by imaging the photodissociation of single quantum-state-selected OCS molecules ', Physical Review A, vol. 98, no. 3, 033417, pp. 1-11 . https://doi.org/10.1103/PhysRevA.98.033417 |
| ISSN: | 2469-9934 2469-9926 0031-9007 |
| Popis: | In a recent letter [Phys. Rev. Lett. 118, 253001 (2017)PRLTAO0031-900710.1103/PhysRevLett.118.253001] we have described how studies of the recoil velocity distribution in the photodissociation of OCS in the energy interval 42 600-42 900 cm-1 revealed an unexpected behavior: the recoil velocity distribution of only the lowest-kinetic-energy photofragments exhibited rapid, resonantlike variations with energy and caused complete inversion of the recoil direction. Periodic orbit analysis and quantum nonadiabatic calculations unveiled the existence of a resonance state localized at large bending angles towards the exit of the dissociation channel. In this article, we present an extensive theoretical study and we show how the fingerprints of these resonances are identified by the analysis of the nonadiabatic transitions and the stereodynamics of photofragments trajectories. Additionally, the experimental study is extended to a second photolysis energy region, 43 300-43 650 cm-1, where a similar rapid variation of the recoil direction is detected. The energy separation between this second resonance region and the one previously reported is ∼800cm-1, which is twice the calculated period of the localized resonant state, offering a second point of convergence between the experiment and the theory. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|