Resonances and Dissociative Electron Attachment in HNCO - Publikacja - MOST Wiedzy

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Resonances and Dissociative Electron Attachment in HNCO

Abstrakt

In a combined experimental and theoretical study, we probe the dissociative electron attachment in isocyanic acid HNCO. The experimental absolute cross section for the NCO− fragment shows a sharp onset and fine structures near the threshold. The autoionizing state responsible for the dissociative attachment is found in both the R-matrix calculation and using analytic continuation in the coupling constant. The involved A' resonance has a mixed π*=σ* character along the dissociating bond and thus combines the effects of nonzero electron angular momentum and dipole-supported states. This leads to unusual behavior of its width at various geometries. Because the potential energy gradient of the autoionizing state points essentially in the direction of the N─H bond, nuclear dynamics can be described by a one-dimensional nonlocal model. The results agree with the experiment both quantitatively and qualitatively. The present system may be a prototype for interpretation of the dissociative electron attachment process in a number of other polyatomic systems.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
PHYSICAL REVIEW LETTERS nr 121, strony 1 - 6,
ISSN: 0031-9007
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Zawadzki M., Čížek M., Houfek K., Čurík R., Ferus M., Civiš S., Kočišek J., Fedor J.: Resonances and Dissociative Electron Attachment in HNCO// PHYSICAL REVIEW LETTERS. -Vol. 121, nr. 143402 (2018), s.1-6
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1103/physrevlett.121.143402
Weryfikacja:
Politechnika Gdańska

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