SwePub - search: WFRF:(Aksela H.)

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1.	Gelmukhanov, F, et al. (author) Theory of Auger spectra for molecular-field-split core levels 1996 In: PHYSICAL REVIEW A. - : AMER INST PHYSICS. ; 53:3, s. 1379-1387 Journal article (other academic/artistic)abstract A theory for nonradiative decay of molecular-held-split states is presented. It is shown that the relative inner-shell sublevel cross sections for Auger transitions are sensitively dependent on the matching of spin-orbit and molecular-field interactions.
2.	Kukk, E, et al. (author) Raman versus non-Raman behavior in resonant auger spectra of HCl 1996 In: PHYSICAL REVIEW LETTERS. - : AMER INST PHYSICS. ; 76:17, s. 3100-3103 Journal article (other academic/artistic)abstract Two different types of Anger processes are shown to constitute the resonant Anger spectra of HCl: one which does and one which does not show Raman narrowing with the decrease of the spectral width of the exciting radiation. An analytical explanation for t
3.	Aksela, H, et al. (author) Angular anisotropy of the Kr 3d(3/2,5/2)(-1)5p->4p(-2)5p resonant Auger decay studied by utilizing the auger resonant Raman effect 1996 In: PHYSICAL REVIEW A. - : AMER INST PHYSICS. - 1050-2947. ; 54:1, s. 605-612 Journal article (other academic/artistic)abstract The anisotropy of the resonant Auger decay of the photoexcited Kr 3d(3/2,5/2)(-1)5p states has been studied by comparing the new high-resolution experimental results with the multiconfiguration Dirac-Fock calculations. The measurements were made with very
4.	AKSELA, H, et al. (author) CORRELATION-EFFECTS IN THE RESONANT AUGER DECAY OF THE XE 4D(3/2,5/2)(-1)6P STATES STUDIED BY HIGH-RESOLUTION EXPERIMENT AND MULTICONFIGURATION DIRAC-FOCK THEORY 1995 In: PHYSICAL REVIEW A. - : AMER INST PHYSICS. - 1050-2947. ; 51:2, s. 1291-1303 Journal article (other academic/artistic)
5.	AKSELA, H, et al. (author) PARTIAL AUGER DECAY-RATES OF CORE-IONIZED MOLECULAR-STATES IN HCL AND DCL 1995 In: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. - 0953-4075. ; 28:19, s. 4259-4268 Journal article (other academic/artistic)abstract The Cl 2p ionization and the subsequent 2p(-1) --> 2 pi(-2) Auger decay in HCl and DCl molecules have been studied using synchrotron radiation. The Anger spectra have been decomposed and assigned to the transitions from the (2) Pi(1/2), (2) Sigma(1/2) and
6.	Aksela, H, et al. (author) The character of the Xe 4p -> nl resonances studied with the aid of their Auger decay 1998 In: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. - 0953-4075. ; 31:24, s. 5337-5346 Journal article (other academic/artistic)abstract Theoretical predictions for the Xe 4p --> nl photoexcitation are shown to depend strongly on the gauge and wavefunctions used in calculations. In order to test the theory, the resonant Auger decay of the Xe 4p(-1)nl states has been measured with high phot
7.	Aksela, S., et al. (author) Accurate free atom-solid binding energy shifts for Au and Ag 2012 In: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048. ; 185:8-9, s. 273-277 Journal article (peer-reviewed)abstract Binding energy shifts between atomic and solid states have been observed with improved accuracy for All 4f and Ag 3d core levels applying a simultaneous measurement method. Also the 3d photoelectron spectrum and binding energies of free Ag atoms have been observed for the first time. New values determined as free atom to bulk solid shifts deviate considerably from previous estimate for Au but agree reasonably well for Ag. The valence bands were also found to shift rather accurately by the same amount as the core levels. (C) 2012 Published by Elsevier B.V.
8.	AKSELA, S, et al. (author) EXPERIMENTAL-VERIFICATION OF THE LINE-SHAPE DISTORTION IN RESONANCE AUGER-SPECTRA 1995 In: PHYSICAL REVIEW LETTERS. - : AMER INST PHYSICS. - 0031-9007. ; 74:15, s. 2917-2920 Journal article (other academic/artistic)
9.	AUSMEES, A, et al. (author) HIGH-RESOLUTION STUDY OF THE XE 4D(5/2)/4D(3/2) BRANCHING RATIO 1995 In: PHYSICAL REVIEW A. - : AMER INST PHYSICS. ; 51:1 Other publication (other academic/artistic)
10.	AUSMEES, A, et al. (author) OBSERVATION OF ANOMALOUS BEHAVIOR OF THE XE 4D PHOTOELECTRON SATELLITES 1995 In: PHYSICAL REVIEW A. - : AMER INST PHYSICS. - 1050-2947. ; 52:4, s. 2943-2947 Journal article (other academic/artistic)abstract The Xe 4d photoelectron satellites have been studied in the photon energy region 90-200 eV. The substantially improved energy resolution has enabled us to determine a wealth of satellites. A comparison of the satellite spectra at the intermediate excitati
11.	deBrito, AN, et al. (author) Fast dissociation of resonantly core excited H2S studied by vibrational and temporal analysis of the Auger spectra 1997 In: THEOCHEM-JOURNAL OF MOLECULAR STRUCTURE. - : ELSEVIER SCIENCE BV. - 0166-1280. ; 394:2-3, s. 135-145 Journal article (other academic/artistic)abstract Excitation of a core electron to the lowest unoccupied orbital of H2S has been shown to give rise to dissociation that occurs faster than the Auger decay. Recent experimental data have allowed us to resolve vibrational structures connected with the resona
12.	Holappa, M., et al. (author) Atom-solid binding energy shifts for K 2p and Rb 3d sublevels 2011 In: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048. ; 184:7, s. 371-374 Journal article (peer-reviewed)abstract Binding energy shifts between free and solid state atoms for K 2p and Rb 3d photolines have been determined by measuring the vapor and solid state spectra simultaneously in similar experimental conditions applying synchrotron radiation excited photoelectron spectroscopy. This method has the important benefit that the work function is not needed to correct for different reference energy levels, therefore much more accurate values for binding energy shifts are obtained. (C) 2011 Elsevier B.V. All rights reserved.
13.	Jankala, K., et al. (author) Inner-shell 2p photoionization and Auger decay of atomic silicon 2008 In: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 77:6 Journal article (peer-reviewed)abstract A detailed experiment on 2p photoionization and subsequent Auger decay of atomic silicon is presented. Fine-structure-resolved photoelectron and Auger electron spectra are interpreted with the aid of large-scale multiconfiguration calculations. Energy separation and the relative cross sections of the 2p ionized fine-structure states of Si+ are given. The complete 2p Auger electron spectrum of Si is interpreted, and the intensity distribution to individual doubly ionized final states is studied.
14.	Jänkälä, K., et al. (author) Laser excitation combined with 2p photoionization and Auger decay of potassium 2006 In: PHYSICAL REVIEW A. ; 73, s. 022720- Journal article (peer-reviewed)
15.	Kukk, E, et al. (author) Auger decay of the dissociating core-excited states in the HCl and DCl molecules 1996 In: JOURNAL OF CHEMICAL PHYSICS. - : AMER INST PHYSICS. ; 104:12, s. 4475-4480 Journal article (other academic/artistic)abstract High-resolution Auger electron spectra from the decay of the Cl 2p-->sigma* excitation in HCl and DCl have been measured. The spectra are analyzed, separating molecular and atomic features, which are assigned to transitions to the HCl (5 sigma 2 pi)(4) si
16.	Kukk, E, et al. (author) Core-to-Rydberg excitations and their Auger decay in the HCl and DCl molecules 1996 In: PHYSICAL REVIEW A. - : AMER INST PHYSICS. - 1050-2947. ; 54:3, s. 2121-2126 Journal article (other academic/artistic)abstract The resonant Anger electron spectra of the HCl and DCl molecules have been measured at the first core-to-Rydberg resonances. The low binding energy region of the spectra has been decomposed into transitions to different bound states and their vibrational
17.	Mursu, J, et al. (author) Decay of the 2p(5)4s, 2p(5)3d and 2p(5)4d states of Ar studied by utilizing the Auger resonant Raman effect 1996 In: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. - 0953-4075. ; 29:19, s. 4387-4399 Journal article (other academic/artistic)abstract The 2p electrons of Ar have been excited selectively to the 4s, 3d and 4d orbitals and high-resolution de-excitation spectra have been recorded by utilizing the Auger resonant Raman effect. Fine structures in the resonant Anger spectra have been clearly r
18.	Niskanen, Johannes, et al. (author) Experimental and theoretical study of core-valence double photoionization of OCS 2010 In: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 82:4, s. 043436- Journal article (peer-reviewed)abstract O 1s, C 1s, and S 2p core-valence double ionization electron spectra of the OCS molecule have been obtained experimentally by a time-of-flight photoelectron-photoelectron coincidence spectroscopy technique. In order to analyze and assign the spectral features observed, we present a protocol for computing core-valence ionization energies of such systems. The protocol is based on a restricted active space multiconfigurational self-consistent field (MCSCF) methodology with a freeze-relax procedure to guarantee a correct core-valence state root index without variational collapse. Corrections for extended dynamical correlation and core-core correlation, respectively, are made by multiconfigurational perturbation theory and by uncontracted basis set Moller-Plesset theory. Envisioning applications to larger molecules, a spin-restricted open-shell density functional method is also applied for the lowest core-valence energies. Furthermore, cross sections through a scheme for computing multiatom Auger transitions generating core-valence holes are presented. We find that the procedure outlined is capable of deriving the energy onset of core-valence ionization within a fraction of an eV and that assignments can be made of the most salient spectral features.
19.	Niskanen, Johannes, et al. (author) Photoelectron angular distribution and linear magnetic dichroism in the 4p photoemission from Rb atoms 2010 In: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 81:1, s. 013406- Journal article (peer-reviewed)abstract The angular distribution of photoelectrons and linear magnetic dichroism in the angular distribution for the 4p photoemission from Rb atoms in the ground state, oriented by laser pumping, were measured in the photon energy range from 50 to 100 eV. The experimental results are compared with the multiconfiguration Dirac-Fock (MCDF) calculations. We show that the zero-crossing of the dichroism as a function of energy is connected with the Cooper minimum in the cross section. This fact can be used for an accurate determination of the position of the Cooper minimum.
20.	Niskanen, Johannes, et al. (author) Valence photoionization of the LiCl monomer and dimer 2010 In: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 81:4, s. 043401- Journal article (peer-reviewed)abstract This paper reports a study of valence photoionization of the LiCl monomer and dimer. The behavior of the photoionization partial cross section for molecular valence orbitals was measured as a function of photon energy between 15 and 35 eV. A square-integrable-function method was used to model the ionization partial cross section in both the LiCl monomer and dimer.
21.	OSBORNE, SJ, et al. (author) THE VIBRATIONALLY RESOLVED PARTICIPATOR AUGER-SPECTRA OF SELECTIVELY EXCITED C-1S(2-SIGMA(-1))2-PI(1) VIBRATIONAL-STATES IN CARBON-MONOXIDE 1995 In: JOURNAL OF CHEMICAL PHYSICS. - : AMER INST PHYSICS. - 0021-9606. ; 102:19, s. 7317-7324 Journal article (other academic/artistic)
22.	Partanen, L., et al. (author) 2s photoionization and subsequent Auger cascade in atomic Si 2010 In: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 81:6 Journal article (peer-reviewed)abstract The 2s photoionization and subsequent Auger transition cascade in atomic Si were studied by means of synchrotron-radiation-induced electron spectroscopy. After the 2s photoionization, the core hole states decay predominantly by a two-step Auger transition cascade into the triply ionized [Ne]nl states. The ionization channels of the 2s core-ionized Si+ atoms to Si3+ ions were observed by measuring the conventional Auger electron spectra of the L-1-L2,3M Coster-Kronig transitions and the L2,3M-MMM Auger transitions. The observed L-1-L2,3M and L2,3M-MMM Auger spectra were analyzed by means of extensive multiconfiguration Dirac-Fock computations. We found that the electron correlation plays a prominent role in the Auger cascade, especially for the final-step Auger L2,3M-MMM spectrum. Additionally, it was seen that the L2,3M-MMM Auger spectrum of Si includes more Auger groups than the isoelectronic L-2,L-3-MMAuger spectrum of Al. Thus, more information on the intermediate ionic states is obtained if they are produced by Auger cascade rather than by direct photoionization.
23.	Patanen, M., et al. (author) 4f photoionization and subsequent Auger decay in atomic Pb: Relativistic effects 2011 In: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 83:5 Journal article (peer-reviewed)abstract High-resolution 4f photoelectron and subsequent Auger-electron spectra have been measured from free Pb atoms using synchrotron radiation. The fine structure of the spectra has been investigated theoretically by calculating the energies and intensities for 4f photoionization and Auger decay processes using the multiconfigurational Dirac-Fock approach. The role of the relativistic effects in the ground and singly and doubly ionized states has been studied on the basis of computed results and their comparison with experiment.
24.	Patanen, M., et al. (author) High-resolution study of K 3p photoabsorption and resonant Auger decay in KF 2009 In: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 80:1 Journal article (peer-reviewed)abstract High-resolution (K3p sigma and pi)->sigma absorption spectrum of KF in the photon energy range of 18.2-19.4 eV was measured at the new FINEST beamline branch on the I3 beamline on MAX III. The experimental spectrum is presented and interpreted using nonrelativistic ab initio molecular calculations corrected with perturbation theory treatment to account for spin-orbit interaction. Resonant Auger decay recorded at the strongest resonances is also presented and reproduced by theoretical calculations. Also a brief introduction to the FINEST beamline branch is presented.
25.	Patanen, M., et al. (author) Strong molecular field effects in Auger decay of the potassium 2p core-hole state in molecular KCl, KBr and KI 2008 In: Journal of Physics B: Atomic, Molecular and Optical Physics. - : IOP Publishing. - 0953-4075 .- 1361-6455. ; 41:21 Journal article (peer-reviewed)abstract The K 2p photoionization and subsequent LMM Auger decay have been studied for molecular gas-phase KCl, KBr and KI. The detected manifold spectral structure of the Auger electron spectrum of KCl has been interpreted to originate from strong molecular field effects. This indicates that Auger decay on potassium side of originally very ionic molecules creates inner-shell hole states with a strong molecular character.
26.	Patanen, M., et al. (author) Valence photoionization and photoelectron-photoion coincidence (PEPICO) study of molecular LiCl and Li2Cl2 2012 In: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048. ; 185:8-9, s. 285-293 Journal article (peer-reviewed)abstract Molecular LiCl and Li2Cl2 have been studied in the vapor phase with valence photoelectron and photoelectron-photoion coincidence spectroscopies. These two techniques determine the binding energies in fundamentally different ways. Binding energies obtained from photoelectron spectra are usually taken as the vertical ionization energies of the corresponding electronic states. In cases with several overlapping bands, corresponding to different electronic states, the coincidence measurement can separate the bands if the respective final states fragment differently. This applies well to the monomer case. To facilitate the determination of state-specific ionization energies in the dimeric molecule, a theoretical Franck-Condon analysis has been carried out. Moreover, ab initio coupled-cluster and density-functional-theory calculations have been used to analyze the fragmentation pattern based on asymptotic dissociation energies. The fragmentation pattern is largely common to all the accessible valence-ionized states of the chiller, consistent with rapid conversion to the ionic ground state before fragmentation. However, the highest-lying state of Li2Cl2+, (2)A(g). shows enhanced propensity for Li+ as dissociation product. (C) 2012 Elsevier B.V. All rights reserved.
27.	SAIRANEN, OP, et al. (author) THE RESONANCE AUGER DECAY OF THE XE 4D(3/2,5/2)(-1)NP, N=7,8 STATES STUDIED BY HIGH-RESOLUTION EXPERIMENT 1995 In: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. - 0953-4075. ; 28:20, s. 4509-4528 Journal article (other academic/artistic)abstract The de-excitation of the resonantly excited Xe 4d(3/2,5/27p)(-1) and 4d(3/2,5/2)(-1)8p states is studied with very high photon and electron energy resolution using the new Finnish beamline at MAX-laboratory, Lund, Sweden. The fine structure of the spectra
28.	Sankari, R, et al. (author) High resolution O 1s photoelectron shake-up satellite spectrum of H2O 2006 In: Chemical Physics Letters. - : Elsevier BV. - 0009-2614. ; 422:1-3, s. 51-57 Journal article (peer-reviewed)abstract The O 1s photoelectron satellite spectrum of water has been recorded with high resolution and some vibrational structures were detected. The electronic and vibrational structures observed in the experimental spectrum are well interpreted with the aid of the molecular ab initio calculations based on the symmetry adapted cluster-configuration interaction (SAC-CI) method. (c) 2006 Elsevier B.V. All rights reserved.
29.	Schulz, J., et al. (author) 5p photoemission from laser excited cesium atoms 2006 In: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 73:6 Journal article (peer-reviewed)abstract Fine-structure resolved 5p photoemission spectra of Cs in the ground state and after laser excitation into the [Xe]6p P-2(1/2) and 6p(2)P(3/2) states have been studied. The 5p(5)6p final states have been reached by the 5p(6)6s -> 5p(5)6p conjugate shakeup process from ground-state atoms as well as by direct photoemission from laser-excited atoms. The laser-excited spectra can be well described with calculations based on the jK-coupling model. Calculations based on a multiconfiguration Dirac-Fock approach have been performed to investigate the deviations created by intermediate coupling from the pure jK-coupling scheme.
30.	Schulz, J., et al. (author) A method to characterize electronic states of 4s ionized Rb by combined laser and synchrotron spectroscopy 2008 In: Europhysics letters. - : IOP Publishing. - 0295-5075 .- 1286-4854. ; 83:5, s. 53001- Journal article (peer-reviewed)abstract Photoelectron studies of laser-excited atomic states can reveal more information about the final ionic states than ground-state photoemission. The possibility to tune the laser to distinct fine-structure sub-states of the excited states allows to select specific angular-momentum couplings of the valence electron that are conserved during photoemission. In the 4s photoemission of laser-excited rubidium we use this method to determine the final-state energies and widths of doubly excited ionic states and characterize the angular-momentum couplings.
31.	Schulz, J., et al. (author) Characterisation of weakly excited final states by shakedown spectroscopy of laser excited potassium 2006 In: Phys. Rev. A. ; 74, s. 12705- Journal article (peer-reviewed)
32.	Schulz, Joachim, et al. (author) Characterization of weakly excited final states by shakedown spectroscopy of laser-excited potassium 2006 In: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 74:1, s. 012705- Journal article (peer-reviewed)abstract 3p shakedown spectra of laser excited potassium atoms as well as direct 3p photoemission of ground state potassium have been studied. These two excitation schemes lead to the same final states and thereby provide a good basis for a detailed study of the 3p(5)(4s3d)(1) configurations of singly ionized potassium and the photoemission processes leading to these configurations. The comparison of direct photoemission from the ground state and conjugate shakedown spectra from 4p(1/2) laser excited potassium made it possible to experimentally determine the character of final states that are only weakly excited in the direct photoemission but have a much higher relative intensity in the shakedown spectrum. Based on considerations of angular momentum and parity conservation the excitation scheme of the final states can be understood.
33.	Schulz, J., et al. (author) Final state selection in the 4p photoemission of Rb by combining laser spectroscopy with soft x-ray photoionization 2005 In: Phys. Rev. A. ; 72:032718 Journal article (peer-reviewed)
34.	Schulz, Joachim, et al. (author) Shakedown in core photoelectron spectra from aligned laser-excited Na atoms 2005 In: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 72:1 Journal article (peer-reviewed)abstract In an experiment combining a state-of-the-art visible laser system with the vacuum ultraviolet beamline I411 at the storage ring MAX II, shakedown satellite lines in the 2p photoelectron emission of excited Na atoms have been observed. A close investigation of these lines shows a strong dependency of the line intensities from the linear polarization angle of the laser light. The shakedown electrons are preferably emitted into the direction of the laser electric field vector.
35.	SVENSSON, S, et al. (author) FAST DISSOCIATION OF NEUTRAL DOUBLY-EXCITED STATES ABOVE THE S-2P IONIZATION THRESHOLD IN H2S 1995 In: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. ; 28:10 Other publication (other academic/artistic)abstract A very rapid dissociation of core doubly excited stares in a molecule has been observed for the first time. The channel is identified in the Anger electron spectra of H2S where the resonating structures, at higher kinetic energy than the normal Auger LVV
36.	Svensson, S, et al. (author) High resolution core electron spectroscopy of atoms and molecules on the Finnish beamline at the MAX laboratory 1995 In: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. ; 75, s. 67-82 Journal article (other academic/artistic)abstract A brief survey of high resolution gas phase photo- and resonance Auger electron spectroscopy on the newly constructed BL 51 at the MAX laboratory is given. The powerful combination of the monochromator and the electron spectrometer with a very high resolu
37.	Tchaplyguine, Maxim, et al. (author) Size-dependent evolution of electronic structure in neutral Pb clusters-As seen by synchrotron-based X-ray photoelectron spectroscopy 2014 In: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048 .- 1873-2526. ; 195, s. 55-61 Journal article (peer-reviewed)abstract Neutral Pb clusters in the size range from a few tens of atoms up to similar to 100 atoms are studied using synchrotron-based photoelectron spectroscopy. The electronic structure is seen to differ increasingly from that of the solid when the cluster size decreases. The valence band narrows gradually - down to about one fifth of the solid-state band width at the smallest size of few tens of atoms. Simultaneously the Fermi-edge energy shifts further away from the solid value by more than 2 eV. The Pb 5d core level binding energy also increases and the spectral features broaden and change in shape. The changes observed for the valence and for the 5d response energies and shapes are discussed in the context of the metal-to-insulator transition observed earlier in Pb clusters below the critical size of 20-30 atoms/cluster. (C) 2014 Elsevier B.V. All rights reserved.
38.	Thiagarajan, Balasubramanian, et al. (author) The Normal Incidence Monochromator Beamline I3 on MAX III 2010 In: AIP Conference Proceedings. - : AIP. - 1551-7616 .- 0094-243X. ; 1234, s. 661-664 Conference paper (peer-reviewed)abstract On the 700 MeV MAX III ring at MAX-lab, a 6.65 m off-axis eagle type monochromator beamline has recently been commissioned. The beamline is sourced by an apple type variable polarization undulator. The energy range of the beamline is 4.6-50 eV and the resolving power achieved is more than 100,000. There are two branch lines, one for angle and spin resolved photoemission studies from solids and the other for gas phase and luminescence experiments. We present the design and performance of the beamline.
39.	Urpelainen, S., et al. (author) FINEST:A high performance branch-line for VUV photon energy range gas phase studies at MAX-lab 2010 In: AIP Conference Proceedings. - : AIP. - 0094-243X. - 9780735407824 ; 1234, s. 411-414 Conference paper (peer-reviewed)abstract We present a dedicated beamline branch for high flux and ultra-high resolution (R>100000) gas and vapor phase studies in the vacuum-ultra-violet (VUV) region of light on the undulator beamline I3, located on the 700 MeV MAX-III storage ring. The mechanical and optical design of the branch-line, the differential pumping setup as well as performance characteristics are presented.
40.	Urpelainen, S., et al. (author) Valence photoionization and the following fragmentation pathways in Sb-4 clusters 2009 In: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 80:4, s. 043201- Journal article (peer-reviewed)abstract The valence photoelectron spectrum of Sb-4 clusters and the following fragmentation patterns have been studied using synchrotron radiation and electron-ion coincidence technique. An experimental photoelectron spectrum of the 5t(2) ionization of Sb-4 is presented. Theoretical molecular calculations, together with the existing data on the noble gas xenon, were used to describe the experimental results. The bonding properties of the molecular orbitals involved are used to qualitatively describe the dissociation process.
41.	deBrito, AN, et al. (author) Auger decay of the molecular field split S 2p core excited states in HS radical 1997 In: JOURNAL OF CHEMICAL PHYSICS. - : AMER INST PHYSICS. - 0021-9606. ; 106:1, s. 18-23 Journal article (other academic/artistic)abstract Using synchrotron radiation, very high resolution electron spectra at the 2p --> 6a(1) and 2p --> 3b(2) resonances of H2S have been recorded. Auger transitions from molecular field split S 2p hole states of HS* fragment, created by fast dissociation of th
42.	Fink, RF, et al. (author) Theory and ab initio calculations of 2p photoabsorption spectra: The lowest Rydberg resonances in HCl 1999 In: JOURNAL OF CHEMICAL PHYSICS. - : AMER INST PHYSICS. - 0021-9606. ; 111:22, s. 10034-10045 Journal article (other academic/artistic)abstract We present a theory for 2p core excitation spectra of linear molecules that explicitly includes the spin-orbit splitting of the 2p core orbitals as well as all nonrelativistic effects. This is applied to the absorption spectrum of HCl at the 2p --> 6 sigm
43.	Fritzsche, S., et al. (author) Photoelectron satellite structure from the 3d and 4d inner-shell ionization of rubidium and cesium: Role of atomic relaxation 2008 In: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 78:3 Journal article (peer-reviewed)abstract The photoelectron satellite structure of rubidium and cesium has been investigated following the photoionization of an nd (n= 3,4) inner-shell electron. The intensity ratios of the nd(-1) ms monopole and nd(-1) m'p conjugated satellite lines have been measured at MAX-lab by using high-resolution electron spectroscopy. For rubidium, moreover, the energy dependence of the 3d(j)6s/3d(j)5s and 3d(j)5p/3d(j)5s intensity ratios with j=3/2 and 5/2 is measured and compared with multiconfiguration Dirac-Fock calculations. A good or at least reasonable agreement is found for both the monopole and conjugated shake-up probabilities if the relaxation of the bound-state electron density is taken into account in the computation of the photoionization cross sections. It is shown that, for the inner-shell ionization of medium and heavy atoms, the orbital relaxation accounts for a significant part of the satellite structure in the photoelectron spectra.
44.	Garofalo, M, et al. (author) Antitumor effect of oncolytic virus and paclitaxel encapsulated in extracellular vesicles for lung cancer treatment 2018 In: Journal of controlled release : official journal of the Controlled Release Society. - : Elsevier BV. - 1873-4995. ; 283, s. 223-234 Journal article (peer-reviewed)
45.	Jänkälä, K., et al. (author) Shake-up satellites accompanying the inner shell ionization of alkali atoms 2007 In: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048 .- 1873-2526. ; 161:1-3, s. 95-98 Journal article (peer-reviewed)abstract The shake-up probabilities of the outermost electron in inner shell ionization and subsequent Auger decay of alkali atoms have been studied in the sudden approximation model using the wavefunctions obtained with the multiconfiguration Dirac-Fock (MCDF) method. The tendencies of the shake-up probabilities for both the initially excited and the nonexcited configurations were found to be predicted well in the photoionization by the model used. Based on the calculations, the second shake-up during Auger decay was found to receive considerable high intensity.
46.	Karpenko, A., et al. (author) Behavior of relative state selective photoionization cross sections of RbBr molecules in the valence region 2014 In: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 90:6 Journal article (peer-reviewed)abstract The photon energy dependence of relative photoionization cross sections in the valence ionization energy region of 5 to 45 eV for 4p and 4s orbitals of Rb and Br ions in RbBr vapors has been investigated. The behavior of state selective cross sections of molecular valence orbitals has been analyzed by comparing the observed 4p to 4s photoelectron intensity branching ratios with atomic state selective photoionization cross sections of Kr, taking into account the mixing between Br 4s(-1) and Rb 4p(-1) molecular states. Using atomic dipole matrix elements to calculate the photoionization intensity of alkali halides has been suggested.
47.	Karpenko, A., et al. (author) Breakdown of ionic character of molecular alkali bromides in inner-valence photoionization 2014 In: Journal of Chemical Physics. - : AIP Publishing. - 0021-9606 .- 1089-7690. ; 140:20 Journal article (peer-reviewed)abstract The inner-valence region of alkali bromide XBr (X=Li, Na, K, Rb) vapours has been studied experimentally by means of synchrotron radiation excited photoelectron spectroscopy. Experimental spectra were analyzed by comparing them with available theoretical results and previous experiments. Ionic character of alkali bromides is seen to change in the inner-valence region with increasing atomic number of the alkali atom. A mechanism involving mixing between Br 4s and Rb 4p orbitals has been suggested to account for the fine structure observed in inner-valence ionization region of RbBr. (C) 2014 AIP Publishing LLC.
48.	Kettunen, J. A., et al. (author) Electron-ion coincidence study of photofragmentation of the CdCl2 molecule 2011 In: Journal of Mass Spectrometry. - : Wiley. - 1076-5174. ; 46:9, s. 901-907 Journal article (peer-reviewed)abstract In this work, the photofragmentation subsequent to valence and Cd4d photoionization of cadmium dichloride (CdCl2) were studied using He I and synchrotron excitation. The measurements were performed with a photoelectron-photoion coincidence (PEPICO) setup, and the connection between the singly ionized electronic states and cationic fragments was investigated. The valence-ionized states were found to lead to CdCl2+, Cd+ and CdCl+. The Cd4d(-1) states were found to lead only to Cl+ ions. The observed charge transfer effect between Cd and Cl was concluded to take place due to internal conversion or fluorescence decay to dissociating valence states either directly or through consecutive fragmentation. The fragmentation energetics were investigated with molecular ab initio calculations, and the calculated energies were found to agree with the detected fragment appearances. Copyright (C) 2011 John Wiley & Sons, Ltd.
49.	Makinen, A., et al. (author) Relative photoionization cross section of Cr atoms in the valence region 2012 In: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 85:5, s. 053411- Journal article (peer-reviewed)abstract In this paper, we report a measurement of a single photoionization cross section of atomic Cr as a function of photon energy between 10 and 35 eV. The result is compared to a semiempirical model employing orbital-based ionization cross-section calculations from the literature. While the wide energy splitting of the singly ionized valence states explains the behavior of the ionization cross section in the lower-energy end, reasons for the mismatch between the calculations and the experiment in the higher-energy end are discussed.
50.	Määttä, M., et al. (author) Valence photoelectron spectra of Na, K, Rb and Cs with s or p outermost electron : Evolution of the states from LS-coupling to jK-coupling 2007 In: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048 .- 1873-2526. ; 161:1-3, s. 99-104 Journal article (peer-reviewed)abstract The development of the fine structure of the np(5)(n + 1)s and np(5)(n + 1)p (n = 2 in Na, n = 3 in K, n = 4 in Rb, n = 5 in Cs) configurations of alkali atoms ions from LS-coupling to jK-coupling has been studied by comparing the experimental photoelectron spectra with the results obtained with analytical LS-coupling and jK-coupling models.

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