Coincidence studies of doubly charged ions formed by 30.4 nm photoionization

Curtis, D.M.; Eland, J. H. D.

doi:10.1016/0168-1176(85)80028-8

Cited by 221 publications

(100 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…perpendicular to the main diagonal (corresponding to a cut through the signal at a slope of -1). The kinetic energy release (KER) would then be 3.5 ± 0.5 eV, using the results from earlier work [38]. This implies that the unseen neutral corresponds to Y 11 .…”

Section: The Hmentioning

confidence: 90%

Fission processes following core level excitation in closo ‐1,2‐orthocarborane

Rühl

Hitchcock

Bozek

et al. 2009

Physica Status Solidi (b)

View full text Add to dashboard Cite

Time‐of‐flight mass analysis with multi‐stop coincidence detection was used to study the multi‐cation ionic fragmentation of the closo carborane cage molecule closo ‐1,2‐orthocarborane (C2B10H12) following inner‐shell excitation in or above the B 1s regime. Electron ion coincidence spectra reveal the cationic products which are formed after core level excitation. Distinct changes in fragmentation pattern are observed as a function of excitation energy. Photoelectron–photoion–photoion coincidence (PEPIPICO) spectroscopy was used to study the dominant fission routes in the core level excitation regime. Series of ion pairs are identified, where asymmetric fission dominates, leading to ion pairs of different mass. Suitable fission and fragmentation mechanisms are discussed. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Section: The Hmentioning

confidence: 90%

Fission processes following core level excitation in closo ‐1,2‐orthocarborane

Rühl

Hitchcock

Bozek

et al. 2009

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

“…Two paired fragment ions resulting from a breakup channel form a stripe in the PIPICO spectrum (also e.g. [27,[47][48][49][50] of the fragment ions to determine the populated electronic state of the parent dication and the asymptotic final energy. Once determined, these values are used to back trace the path the molecule took through the PES, as discussed in the following subsections.…”

Section: (A)mentioning

confidence: 99%

Photo-double-ionization of ethylene and acetylene near threshold

Gaire¹,

Lee²,

Haxton³

et al. 2014

Phys. Rev. A

View full text Add to dashboard Cite

We present kinematically complete measurements of the photo double ionization of ethylene (double CC bond) and acetylene (triple CC bond) hydrocarbons just above the double ionization threshold. We discuss the results in terms of the coincident kinetic energy of the photo electrons and the nuclear kinetic energy release of the recoiling ions. We have incorporated quantum chemistry calculations to interpret which of the electronic states of the dication have been populated and trace the various subsequent fragmentation channels. We suggest pathways that involve the electronic ground and excited states of the precursor ethylene dication and explore the strong influence of the conical intersections between the different electronic states. The nondissociative ionization yield is small in ethylene and high in acetylene when compared with the dissociative ionization channels.The reason for such a striking difference is explained in part on the basis of a propensity rule which influences the population of states in the photo double ionization of a centrosymmetric closed shell molecule by favoring singlet ungerade and triplet gerade final states. This propensity rule and the calculated potential energy surfaces clarify a picture of the dynamics leading to the observed dication dissociation products.

show abstract

“…An early study (Price et al 1988) has shown that the nitrous oxide dication is almost completely dissociated within ∼ 10 −8 s of its formation, mainly through the NO + + N + and N + 2 + O + dissociative channels. Regarding the energetics of the N 2 O 2+ dication, its production and dissociation have been experimentally studied by double charge transfer (Price et al 1988;Appell et al 1974;Harris et al 1991), by photoion-photoion coincidence (Price et al 1988;Curtis and Eland 1985), by Auger spectroscopy (Bolognesi et al 2006;Connor et al 1976), by time-of-flight photoelectron-photoelectron coincidence (Eland 2003) and by ion kinetic energy spectrometry (Cooks et al 1974). Some theoretical studies (Price et al 1988;Bolognesi et al 2006;Connor et al 1976;Larkins 1987;Levasseur and Millié 1990) also contributed to the characterization of this molecular dication.…”

Section: Introductionmentioning

confidence: 99%

Determination of structural parameters from advanced molecular electronic spectroscopy: The double ionization of nitrous oxide by synchrotron radiation

Alagia¹,

Furlani²,

Pirani

et al. 2008

Rend. Fis. Acc. Lincei

View full text Add to dashboard Cite

The double photoionization of N 2 O molecules, in the 30-50 eV energy range, has been studied by synchrotron radiation. In the whole energy range, dissociative ionization producing N + + NO + or N + 2 + O + has been M. Alagia ISMN-CNR Sez. Roma1, P.le A. 216 M. Alagia et al.observed. These two processes appear to occur also below the vertical threshold of 35.8 eV, where the double ionization should be indirect. In the range between 35.8 and 38.5 eV. The two processes occur instead by direct coulomb explosion of the N 2 O 2+ dication. Above 38.5 eV, the dissociation leading to NO + + N + is also promoted by the formation of a dication metastable state, which decays by fluorescence to the ground state and then dissociates.

show abstract

Coincidence studies of doubly charged ions formed by 30.4 nm photoionization

Cited by 221 publications

References 29 publications

Fission processes following core level excitation in closo ‐1,2‐orthocarborane

Fission processes following core level excitation in closo ‐1,2‐orthocarborane

Photo-double-ionization of ethylene and acetylene near threshold

Determination of structural parameters from advanced molecular electronic spectroscopy: The double ionization of nitrous oxide by synchrotron radiation

Contact Info

Product

Resources

About