Direct measurement of the rates of nonradiative relaxation processes in electronically excited xenon clusters were carried out. The clusters were created in a pulsed supersonic beam and twophoton excited by femtosecond laser pulses with a wavelength of 263 nm. The measurements were performed using the pump-probe method and electron spectroscopy. It is shown thatrelaxation of light clusters XeN (N < 15) predominantly occurs by desorption of excited xenon atoms with a characteristic time constant of 3 ps. Heavier electronically excited clusters (N> 10) vibrationally relax to the lowest electronically excited state at a rate of about 0.075 eV / ps. Multiply excited clusters are deactivated via energy exchange between excited centers with theionization of one of them. The production of electrons in this process occurs with a delay of ~ 4 ps from the pump pulse, and the process is completed in 10 ps.
|Переведенное название||Измерение времен релаксации однократно и многократно возбужденных кластеров ксенона|
|Журнал||Journal of Chemical Physics|
|Состояние||Опубликовано - 21 мая 2018|
Предметные области Scopus
- Физика и астрономия (все)
- xenon cluster, excited states, pulsed supersonic beam, two-photon excitation, femtosecond laser pulse