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  Roaming dynamics in the photodissociation offFormic acid at 230 nm.

Ma, Y., Liu, J., Li, F., Wang, F., & Kitsopoulos, T. N. (2019). Roaming dynamics in the photodissociation offFormic acid at 230 nm. The Journal of Physical Chemistry A, 123(17), 3672-3677. doi:10.1021/acs.jpca.9b00724.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-AF05-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-AF08-0
Genre: Journal Article

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3060249.pdf (Publisher version), 3MB
 
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Ma, Y., Author
Liu, J., Author
Li, F., Author
Wang, F., Author
Kitsopoulos, T. N.1, Author              
Affiliations:
1Department of Dynamics at Surfaces, MPI for biophysical chemistry, Max Planck Society, ou_578600              

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 Abstract: Roaming dynamics is observed in the photodissociation of formic acid (HCOOH) at 230 nm by using the slice imaging method. In combination with rotational state selective (2 + 1) resonance-enhanced multiphoton ionization of the CO fragments, the speed distributions of the CO fragments exhibit a low recoil velocity at low rotational levels of J = 9 and 20, while the velocity distributions of CO at high rotational levels of J = 30 and 48 show a relatively large recoil velocity. The experimental results indicate that the roaming of OH radical should be related with the formation of CO + H2O channel at the present photolysis energy. Unlike the roaming pathways occurring in H2CO that can be described by loose flat potential, our CO speed distribution analysis suggests the presence of a "tight" flat potential in the roaming dynamics of HCOOH molecules.

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Language(s): eng - English
 Dates: 2019-04-102019-05-01
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1021/acs.jpca.9b00724
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Title: The Journal of Physical Chemistry A
Source Genre: Journal
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Pages: - Volume / Issue: 123 (17) Sequence Number: - Start / End Page: 3672 - 3677 Identifier: -