M
M. A. MacDonald
Researcher at Daresbury Laboratory
Publications - 33
Citations - 581
M. A. MacDonald is an academic researcher from Daresbury Laboratory. The author has contributed to research in topics: Valence (chemistry) & Ionization. The author has an hindex of 15, co-authored 33 publications receiving 569 citations.
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Journal ArticleDOI
Vibrational structure of the O22+ ground state observed by threshold photoelectron coincidence spectroscopy.
TL;DR: Double ionization of O 2 induced by photons from a synchrotron radiation source has been studied in an electron-electron coincidence experiment and a new technique has been developed wherein only electrons with near zero energy are detected by use of the penetrating field method.
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Nature of the cycloheptatrienyl transition-metal bond - a study of electron-distribution in the mixed-ring sandwich molecules ti(eta-c7h(7))(eta-c5h5) , nb(eta-c7h7)(eta-c5h5) , ta(eta-c7h7)(eta-c(5)h(4)me) , and mo(eta-c7h7)(eta-c5h5) by photoelectron-spectroscopy with variable photon energy
TL;DR: In this article, the photoelectron spectra of [Ti(eta-C7H7), [Nb(eta C5H5)], [Ta(etaC 7H7)(eta C(5)H(4)Me)], and [Mo(eta c7H5), were acquired with synchrotron radiation in the incident photon energy range 20-95 eV and the principal source of metal-cycloheptatrienyl ring covalent bonding was found to be the le(2) molecular orbitals.
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Variable photon energy photoelectron-spectroscopy of oso4 and pseudopotential calculations of the valence ionization energies of oso4 and ruo4
Jennifer C. Green,Martyn F. Guest,Ian H. Hillier,Stephen A. Jarrett-Sprague,Nikolas Kaltsoyannis,M. A. MacDonald,Kong Hung Sze +6 more
TL;DR: In this article, the ionization cross sections of the 2t2, 1e, and 2a1 orbitals of osmium tetraoxide have been obtained for the valence bands.
Journal ArticleDOI
Radiative decay of doubly excited states in helium below the He+ (N = 2) ionization threshold
TL;DR: The radiative decay of (1)P(o) doubly excited states in helium has been investigated using a novel apparatus in which metastable atoms and vacuum ultraviolet photons are detected using synchrotron radiation.
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Electronic-structure of metal chalcogen cubane clusters - photoelectron spectroscopic, electrochemical, and theoretical-studies of [(eta-c5h4me)tis]4, [(eta-c5h4me)vs]4, [(eta-c5h5)cro]4, [(eta-c5h4me)cro]4, [(eta-c5h4me)crs]4, [(eta-c5h4me)crse]4, [(eta-c5h4(i)pr)mos]4, and [(eta-c5h4(i)pr)mose]4
Cathryn E. Davies,Jennifer C. Green,Nikolas Kaltsoyannis,M. A. MacDonald,Jingui Qin,Thomas B. Rauchfuss,Catherine M. Redfern,Graham H. Stringer,Mark G. Woolhouse +8 more
TL;DR: In this paper, the relative partial photoionization cross section and photoelectron branching ratio data are presented for the first six valence bands (binding energy 5.0-10.5 eV).