Clustering and multiphoton effects in velocity map imaging of methyl chloride

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F21%3A00538220" target="_blank" >RIV/61388955:_____/21:00538220 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/21:10423430

Výsledek na webu

<a href="http://hdl.handle.net/11104/0316044" target="_blank" >http://hdl.handle.net/11104/0316044</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/00268976.2020.1823507" target="_blank" >10.1080/00268976.2020.1823507</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Clustering and multiphoton effects in velocity map imaging of methyl chloride

Popis výsledku v původním jazyce

We have investigated different effects caused by clustering and multiphoton processes in the photodissociation of CHCl using velocity map imaging (VMI). Single-photon dissociation of CHCl at 193.3 nm yields CHand Cl fragments probed subsequently by resonance enhanced multiphoton ionisation (REMPI) at 333.52 nm and 235.31 nm, respectively. In the clusters, the CHfragments are strongly 'caged' losing most of their kinetic energy. Consequently, the VMI is dominated by a sharp central peak. On the other hand, the Cl fragments lose a broad range of energies in the cluster, yielding a blurred isotropic 'central blob' in VMI. At an increased 193 nm photon flux, another central feature appears in the CHimages for isolated CHCl molecules. This 'hour-glass' shaped image corresponds to the CHCl multiphoton ionisation at 193 nm and subsequent CHClion photodissociation at 333 nm. The ion photodissociation is a parallel process with the anisotropy beta-parameter values between +1.3 and +2.0. The total kinetic energy release (TKER) distribution suggests a high CHvibrational excitation. The CHClion photodissociation is discussed and compared to the photodissociation of similar CHBrion.

Název v anglickém jazyce

Clustering and multiphoton effects in velocity map imaging of methyl chloride

Popis výsledku anglicky

We have investigated different effects caused by clustering and multiphoton processes in the photodissociation of CHCl using velocity map imaging (VMI). Single-photon dissociation of CHCl at 193.3 nm yields CHand Cl fragments probed subsequently by resonance enhanced multiphoton ionisation (REMPI) at 333.52 nm and 235.31 nm, respectively. In the clusters, the CHfragments are strongly 'caged' losing most of their kinetic energy. Consequently, the VMI is dominated by a sharp central peak. On the other hand, the Cl fragments lose a broad range of energies in the cluster, yielding a blurred isotropic 'central blob' in VMI. At an increased 193 nm photon flux, another central feature appears in the CHimages for isolated CHCl molecules. This 'hour-glass' shaped image corresponds to the CHCl multiphoton ionisation at 193 nm and subsequent CHClion photodissociation at 333 nm. The ion photodissociation is a parallel process with the anisotropy beta-parameter values between +1.3 and +2.0. The total kinetic energy release (TKER) distribution suggests a high CHvibrational excitation. The CHClion photodissociation is discussed and compared to the photodissociation of similar CHBrion.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA19-14105S" target="_blank" >GA19-14105S: Reakce atmosferických radikálů na klastrech</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

Molecular Physics

ISSN

0026-8976

e-ISSN

1362-3028

Svazek periodika

119

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

e1823507

Kód UT WoS článku

000572245500001

EID výsledku v databázi Scopus

2-s2.0-85091365450