Dissociative recombination study of PD2+ at CRYRING: absolute cross-section, chemical branching ratios and three-body fragmentation dynamics
2005 (English)In: Molecular Physics, ISSN 0026-8976, E-ISSN 1362-3028, Vol. 103, no 20, 2735-2745 p.Article in journal (Refereed) Published
The paper reports an investigation of the dissociative recombination of PD2+ at the heavy-ion storage ring CRYRING. The absolute cross-section has been measured as a function of centre-of-mass energy ranging from 1 meV to 0.1 eV. The experiment performed has shown the dissociative recombination of PD2+ to be dominated by three-body break-up, with a branching ratio of about 78%. Competition between the available three-body channels producing the ground state, P(S-4), and the. first two excited states, P(D-2) and P(P-2), is observed. The formation of the first excited state dominates over the other two almost equally probable channels with about 75% of all three-body events. The results indicate that the kinetic energy released in the three-body break- up of PD2+ is randomly shared between the deuterium atoms. The intra-molecular angle on dissociation has also been investigated. A comparative analysis of the dissociative recombination dynamics for the two isovalent systems, PD2+ and NH2+, is undertaken.
Place, publisher, year, edition, pages
2005. Vol. 103, no 20, 2735-2745 p.
IdentifiersURN: urn:nbn:se:kth:diva-37904DOI: 10.1080/00268970500185674ISI: 000231813100004ScopusID: 2-s2.0-27944487427OAI: oai:DiVA.org:kth-37904DiVA: diva2:435571