Experimental study of the reaction of O- ions with CO2 molecules with different ternary gases at temperatures relevant to the martian ionosphere

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F21%3A00551263" target="_blank" >RIV/61388955:_____/21:00551263 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/21:10440819

Výsledek na webu

<a href="http://hdl.handle.net/11104/0326701" target="_blank" >http://hdl.handle.net/11104/0326701</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.icarus.2020.114057" target="_blank" >10.1016/j.icarus.2020.114057</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental study of the reaction of O- ions with CO2 molecules with different ternary gases at temperatures relevant to the martian ionosphere

Popis výsledku v původním jazyce

The reaction of oxygen anions with carbon dioxide molecules is considered to be the main channel of CO3- ion formation in the Martian ionosphere. Comprehensive theoretical ion-chemical models of the Martian ionosphere require experimental data on the reactivity of negative ions with neutral gases under relevant ambient temperature and pressure conditions. The temperature dependence of the rate of the ternary reaction of O- with CO2 has been measured at temperatures relevant to the ionosphere of Mars using a VT-SIFT instrument using both helium and nitrogen as the carrier (ternary) gases. The ternary rate coefficient of the reaction was measured equal to (1.24 +/- 0.06) x 10(-28) (300/T)(2.86 +/- 0.28) and (2.29 +/- 0.05) x 10(-28 )(300/T) (2.06 +/- 0.13) cm(6)s(-1) for He and N-2 carrier gas, respectively, in the temperature range of 230-340 K. The k(3) is over two times higher in nitrogen than in helium and has a less strong inverse temperature dependence.

Název v anglickém jazyce

Experimental study of the reaction of O- ions with CO2 molecules with different ternary gases at temperatures relevant to the martian ionosphere

Popis výsledku anglicky

The reaction of oxygen anions with carbon dioxide molecules is considered to be the main channel of CO3- ion formation in the Martian ionosphere. Comprehensive theoretical ion-chemical models of the Martian ionosphere require experimental data on the reactivity of negative ions with neutral gases under relevant ambient temperature and pressure conditions. The temperature dependence of the rate of the ternary reaction of O- with CO2 has been measured at temperatures relevant to the ionosphere of Mars using a VT-SIFT instrument using both helium and nitrogen as the carrier (ternary) gases. The ternary rate coefficient of the reaction was measured equal to (1.24 +/- 0.06) x 10(-28) (300/T)(2.86 +/- 0.28) and (2.29 +/- 0.05) x 10(-28 )(300/T) (2.06 +/- 0.13) cm(6)s(-1) for He and N-2 carrier gas, respectively, in the temperature range of 230-340 K. The k(3) is over two times higher in nitrogen than in helium and has a less strong inverse temperature dependence.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA17-14200S" target="_blank" >GA17-14200S: Experimentální a teoretické studium chemických procesů v atmosférách planet</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Icarus

ISSN

0019-1035

e-ISSN

1090-2643

Svazek periodika

354

Číslo periodika v rámci svazku

JAN 2021

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

4

Strana od-do

114057

Kód UT WoS článku

000590750400033

EID výsledku v databázi Scopus

2-s2.0-85090138399