Electron-stimulated desorption from molecular ices in the 0.15-2 keV regime

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F20%3A00344714" target="_blank" >RIV/68407700:21220/20:00344714 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/5.0021832" target="_blank" >https://doi.org/10.1063/5.0021832</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0021832" target="_blank" >10.1063/5.0021832</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electron-stimulated desorption from molecular ices in the 0.15-2 keV regime

Popis výsledku v původním jazyce

Electron-stimulated desorption (ESD) of cryosorbed molecules on surfaces is a process of relevance to fields as varied as vacuum dynamics in accelerators and astrochemistry. While desorption from such molecular systems induced by keV electrons and fast ions has been extensively studied, the sub-keV electron regime is comparatively little known. We measured and quantified electron-stimulated desorption from molecular ice systems (layers of N 2, CO, CO 2, Ar, and H 2 O/D 2 O condensed at cryogenic temperatures) in the 150-2000 eV electron energy range. In this regime, stopping power is no longer sufficient to explain the electron energy dependence of ESD yields. We introduce the notion of desorption-relevant depth, which characterizes the transition between two energy deposition regimes near the surface. We then apply this notion to the different systems, showing how ESD in the sub-keV regime can, for example, reveal the differences in species diffusion in crystalline and porous amorphous CO 2 ices.

Název v anglickém jazyce

Electron-stimulated desorption from molecular ices in the 0.15-2 keV regime

Popis výsledku anglicky

Electron-stimulated desorption (ESD) of cryosorbed molecules on surfaces is a process of relevance to fields as varied as vacuum dynamics in accelerators and astrochemistry. While desorption from such molecular systems induced by keV electrons and fast ions has been extensively studied, the sub-keV electron regime is comparatively little known. We measured and quantified electron-stimulated desorption from molecular ice systems (layers of N 2, CO, CO 2, Ar, and H 2 O/D 2 O condensed at cryogenic temperatures) in the 150-2000 eV electron energy range. In this regime, stopping power is no longer sufficient to explain the electron energy dependence of ESD yields. We introduce the notion of desorption-relevant depth, which characterizes the transition between two energy deposition regimes near the surface. We then apply this notion to the different systems, showing how ESD in the sub-keV regime can, for example, reveal the differences in species diffusion in crystalline and porous amorphous CO 2 ices.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Physics

ISSN

0021-8979

e-ISSN

1089-7550

Svazek periodika

128

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

16

Strana od-do

—

Kód UT WoS článku

000589710900002

EID výsledku v databázi Scopus

2-s2.0-85095863667