Metastable Evaporation of Molecules from Water Clusters.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00598760" target="_blank" >RIV/61388955:_____/24:00598760 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0356355" target="_blank" >https://hdl.handle.net/11104/0356355</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpca.4c04728" target="_blank" >10.1021/acs.jpca.4c04728</a>

Result language

angličtina

Original language name

Metastable Evaporation of Molecules from Water Clusters.

Original language description

We probe the stability of water clusters by means of their metastable decay probability extracted from two-dimensional reflectron time-of-flight mass spectra. Two different methods are used to ionize and potentially excite the clusters and trigger the evaporation: (i) attachment of electrons with near-zero energies, producing negatively charged (H2O)n- clusters, and (ii) electron impact ionization, producing protonated (H2O)nH+ clusters. The electron attachment is a soft ionization and therefore provides information about the size distribution of the neutral clusters in the beam due to a very limited amount of post-ionization loss of water molecules. A dependence of metastable fractions on the conditions of neutral clusters production prior to the electron attachment is reported. For the cations, the higher energy electron impact ionization leads to a more extensive metastable loss of water molecules. The results are discussed in the light of neutral cluster excitation energy distributions and, for negative clusters, also in terms of binding energies. The experiments demonstrate clearly the role of the excess electron vs the excess proton in the two different charge states of the clusters around sizes N = 50-55, for which binding energies of the anions are derived from the data.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Journal of Physical Chemistry A

ISSN

1089-5639

e-ISSN

1520-5215

Volume of the periodical

128

Issue of the periodical within the volume

40

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

8679-8689

UT code for WoS article

001324845500001

EID of the result in the Scopus database

2-s2.0-85205437941