Počet záznamů: 1
Velocity map imaging of HBr photodissociation in large rare gas clusters
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SYSNO ASEP 0359045 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Velocity map imaging of HBr photodissociation in large rare gas clusters Tvůrce(i) Fedor, Juraj (UFCH-W) ORCID
Kočišek, Jaroslav (UFCH-W) RID, ORCID
Poterya, Viktoriya (UFCH-W) RID, ORCID
Votava, Ondřej (UFCH-W) RID, ORCID
Pysanenko, Andriy (UFCH-W) RID, ORCID
Lipciuc, M. L. (GB)
Kitsopoulos, T. N. (GR)
Fárník, Michal (UFCH-W) RID, ORCIDZdroj.dok. Journal of Chemical Physics. - : AIP Publishing - ISSN 0021-9606
Roč. 134, č. 15 (2011), s. 154303Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova HBr photodissociation ; clusters ; photochemistry Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GA203/09/0422 GA ČR - Grantová agentura ČR CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000289840200016 DOI 10.1063/1.3578610 Anotace We have implemented the velocity map imaging technique to study clustering in the pulsed supersonic expansions of hydrogen bromide in helium, argon, and xenon. The expansions are characterized by direct imaging of the beam velocity distributions. We have investigated the cluster generation by means of UV photodissociation and photoionization of HBr molecules. Two distinct features appear in the hydrogen atom photofragment images in the clustering regime: (i) photofragments with near zero kinetic energies and (ii) “hot” photofragments originating from vibrationally excited HBr molecules. The origin of both features is attributed to the fragment caging by the cluster. We discuss the nature of the formed clusters based on the change of the photofragment images with the expansion parameters and on the photoionization mass spectra and conclude that single HBr molecule encompassed with rare gas “snowball” is consistent with the experimental observations. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2012
Počet záznamů: 1