Precise determination of adiabatic ionisation energies of large polyatomic molecules: p-diaminobenzene
| Autor: | Schmitz, Joel R., Hollenstein, Urs, Merkt, Frédéric |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Molecular Physics |
| ISSN: | 0026-8976 1362-3028 |
| Popis: | We present a procedure, based on established principles, to accurately determine the ionisa-tion energies of medium-sized to large polyatomic molecules in supersonic beams. The methodcombines single-photon excitation from the electronic ground state using tunable vacuum-ultraviolet laser radiation, the delayed pulsed-field ionisation of high Rydberg states with sequencesof pulsed electric fields, and the modelling of the lineshapes from calculations of the field-ionisation dynamics of high Rydberg states and of the rotational contours of the photoelec-tron bands. The method is illustrated by a measurement of the adiabatic ionisation energy ofp-diaminobenzene (p-DB), for which we obtain the value of 54,617.47(15) cm−1, which representsa more than 20-fold accuracy improvement over previous determinations. Molecular Physics ISSN:0026-8976 ISSN:1362-3028 |
| Databáze: | OpenAIRE |
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