Real-time observation of water radiolysis and hydrated electron formation induced by extreme-ultraviolet pulses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F20%3A43920937" target="_blank" >RIV/60461373:22340/20:43920937 - isvavai.cz</a>

Výsledek na webu

<a href="https://advances.sciencemag.org/content/6/3/eaaz0385" target="_blank" >https://advances.sciencemag.org/content/6/3/eaaz0385</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1126/sciadv.aaz0385" target="_blank" >10.1126/sciadv.aaz0385</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Real-time observation of water radiolysis and hydrated electron formation induced by extreme-ultraviolet pulses

Popis výsledku v původním jazyce

The dominant pathway of radiation damage begins with the ionization of water. Thus far, however, the underlying primary processes could not be conclusively elucidated. Here, we directly study the earliest steps of extreme ultraviolet (XUV)–induced water radiolysis through one-photon excitation of large water clusters using time-resolved photoelectron imaging. Results are presented for H2O and D2O clusters using femtosecond pump pulses centered at 133 or 80 nm. In both excitation schemes, hydrogen or proton transfer is observed to yield a prehydrated electron within 30 to 60 fs, followed by its solvation in 0.3 to 1.0 ps and its decay through geminate recombination on a ∼10-ps time scale. These results are interpreted by comparison with detailed multiconfigurational non-adiabatic ab-initio molecular dynamics calculations. Our results provide the first comprehensive picture of the primary steps of radiation chemistry and radiation damage and demonstrate new approaches for their study with unprecedented time resolution. Copyright © 2020 The Authors

Název v anglickém jazyce

Real-time observation of water radiolysis and hydrated electron formation induced by extreme-ultraviolet pulses

Popis výsledku anglicky

The dominant pathway of radiation damage begins with the ionization of water. Thus far, however, the underlying primary processes could not be conclusively elucidated. Here, we directly study the earliest steps of extreme ultraviolet (XUV)–induced water radiolysis through one-photon excitation of large water clusters using time-resolved photoelectron imaging. Results are presented for H2O and D2O clusters using femtosecond pump pulses centered at 133 or 80 nm. In both excitation schemes, hydrogen or proton transfer is observed to yield a prehydrated electron within 30 to 60 fs, followed by its solvation in 0.3 to 1.0 ps and its decay through geminate recombination on a ∼10-ps time scale. These results are interpreted by comparison with detailed multiconfigurational non-adiabatic ab-initio molecular dynamics calculations. Our results provide the first comprehensive picture of the primary steps of radiation chemistry and radiation damage and demonstrate new approaches for their study with unprecedented time resolution. Copyright © 2020 The Authors

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA18-23756S" target="_blank" >GA18-23756S: Transformace molekul rentgenovým zářením: Ab initio simulace v kapalinách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Science Advances

ISSN

2375-2548

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

"eaaz0385"

Kód UT WoS článku

000510488100002

EID výsledku v databázi Scopus

2-s2.0-85078191719