SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Aksela S) "

Sökning: WFRF:(Aksela S)

  • Resultat 1-50 av 55
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Niskanen, Johannes, et al. (författare)
  • Photoelectron angular distribution and linear magnetic dichroism in the 4p photoemission from Rb atoms
  • 2010
  • Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 81:1, s. 013406-
  • Tidskriftsartikel (refereegranskat)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.
  •  
2.
  •  
3.
  • Jankala, K., et al. (författare)
  • Inner-shell 2p photoionization and Auger decay of atomic silicon
  • 2008
  • Ingår i: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 77:6
  • Tidskriftsartikel (refereegranskat)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.
  •  
4.
  •  
5.
  • Partanen, L., et al. (författare)
  • 2s photoionization and subsequent Auger cascade in atomic Si
  • 2010
  • Ingår i: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 81:6
  • Tidskriftsartikel (refereegranskat)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.
  •  
6.
  • Schulz, J., et al. (författare)
  • A method to characterize electronic states of 4s ionized Rb by combined laser and synchrotron spectroscopy
  • 2008
  • Ingår i: Europhysics letters. - : IOP Publishing. - 0295-5075 .- 1286-4854. ; 83:5, s. 53001-
  • Tidskriftsartikel (refereegranskat)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.
  •  
7.
  •  
8.
  • Schulz, Joachim, et al. (författare)
  • Shakedown in core photoelectron spectra from aligned laser-excited Na atoms
  • 2005
  • Ingår i: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 72:1
  • Tidskriftsartikel (refereegranskat)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.
  •  
9.
  • Svensson, S, et al. (författare)
  • New end station for the study of gases, liquids, and solid films at the MAX laboratory
  • 1996
  • Ingår i: REVIEW OF SCIENTIFIC INSTRUMENTS. - : AMER INST PHYSICS. ; 67:6, s. 2149-2156
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • A new end station equipped with a very high-resolution SES-200 electron energy analyzer has been constructed for the study of gases and soft molecular materials. The analyzer is rotatable around the direction of the photon beam, allowing angular-dependent
  •  
10.
  •  
11.
  • AKSELA, H, et al. (författare)
  • PARTIAL AUGER DECAY-RATES OF CORE-IONIZED MOLECULAR-STATES IN HCL AND DCL
  • 1995
  • Ingår i: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. - 0953-4075. ; 28:19, s. 4259-4268
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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
  •  
12.
  • Aksela, H, et al. (författare)
  • The character of the Xe 4p -> nl resonances studied with the aid of their Auger decay
  • 1998
  • Ingår i: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. - 0953-4075. ; 31:24, s. 5337-5346
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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
  •  
13.
  •  
14.
  •  
15.
  • AUSMEES, A, et al. (författare)
  • OBSERVATION OF ANOMALOUS BEHAVIOR OF THE XE 4D PHOTOELECTRON SATELLITES
  • 1995
  • Ingår i: PHYSICAL REVIEW A. - : AMER INST PHYSICS. - 1050-2947. ; 52:4, s. 2943-2947
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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
  •  
16.
  • Bassler, M, et al. (författare)
  • Beam line 1411 at MAX II - performance and first results
  • 2001
  • Ingår i: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT. - : ELSEVIER SCIENCE BV. - 0168-9002. ; 469:3, s. 382-393
  • Tidskriftsartikel (refereegranskat)abstract
    • We report on the characteristics and first results from the soft X-ray beam line I411, based on an undulator at the third generation synchrotron facility MAX II, Sweden. The beam line is designed for high-resolution, angle-resolved electron spectroscopy o
  •  
17.
  • Bassler, M, et al. (författare)
  • Soft X-ray undulator beam line I411 at MAX-II for gases, liquids and solid samples
  • 1999
  • Ingår i: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. - 0368-2048. ; 103, s. 953-957
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We report on the build-up of the new undulator beam line I411 at the third-generation synchrotron radiation facility MAX II in Lund, Sweden. This beam line is based on an upgraded version of the modified SX700-monochromator and the end station which were
  •  
18.
  • Bässler, M., et al. (författare)
  • Beam line I411 at MAX II - Performance and first results
  • 2001
  • Ingår i: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. - 0168-9002. ; 469:3, s. 382-393
  • Tidskriftsartikel (refereegranskat)abstract
    • We report on the characteristics and first results from the soft X-ray beam line I411, based on an undulator at the third generation synchrotron facility MAX II, Sweden. The beam line is designed for high-resolution, angle-resolved electron spectroscopy on gases, liquids and solids. Main components are the modified SX700 monochromator and the end station, both of which were previously used at beam line 51 at MAX I. The end station is equipped with a rotatable SES-200 hemispherical electron-analyser. Before the end station, a one-metre section is reserved for exchangeable experimental set-ups. The usable photon energy range is 50-1500 eV and the photon flux is two orders of magnitudes higher compared to beam line 51. At 400 eV a resolving power of about 5700 in the first order of the monochromator grating could be obtained. In gas phase, a total electron energy resolution of 16 meV has been achieved. Detailed results on the undulator performance, flux, photon and electron energy resolution as well as some technical details are presented here. As an example of the capabilities of the beam line I411, we present the fully vibrationally resolved Auger resonant Raman electron spectrum of gas-phase N 2.
  •  
19.
  • Bässler, M., et al. (författare)
  • Soft x-ray undulator beam line 1411 at MAX-II for gases, liquids and solid samples
  • 1999
  • Ingår i: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048. ; 101-103, s. 953-957
  • Tidskriftsartikel (refereegranskat)abstract
    • We report on the build-up of the new undulator beam line 1411 at the third-generation synchrotron radiation facility MAX II in Lund, Sweden. This beam line is based on an upgraded version of the modified SX700-monochromator and the end station which were installed previously at beam line 51 at MAX I. The end station is equipped with a rotatable Scienta hemispherical electron-analyser making angle-resolved high resolution electron spectroscopy possible for various kinds of samples. The beam line performance will be considerably improved on MAX II due to a new undulator and the superior light source properties, e.g. the small vertical electron beam size. Undulator spectra have been measured and estimates of the photon flux at the experiment and the expected energy resolution are presented. The parameters for a new refocusing mirror were defined by ray tracing using the beam waist of the undulator. The beam line length was extended by 1 m to offer additional space for exchangeable experimental chambers.
  •  
20.
  •  
21.
  • Gelmukhanov, F, et al. (författare)
  • Theory of Auger spectra for molecular-field-split core levels
  • 1996
  • Ingår i: PHYSICAL REVIEW A. - : AMER INST PHYSICS. ; 53:3, s. 1379-1387
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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.
  •  
22.
  • Kukk, E, et al. (författare)
  • Auger decay of the dissociating core-excited states in the HCl and DCl molecules
  • 1996
  • Ingår i: JOURNAL OF CHEMICAL PHYSICS. - : AMER INST PHYSICS. ; 104:12, s. 4475-4480
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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
  •  
23.
  • Kukk, E, et al. (författare)
  • Core-to-Rydberg excitations and their Auger decay in the HCl and DCl molecules
  • 1996
  • Ingår i: PHYSICAL REVIEW A. - : AMER INST PHYSICS. - 1050-2947. ; 54:3, s. 2121-2126
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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
  •  
24.
  • Kukk, E, et al. (författare)
  • Raman versus non-Raman behavior in resonant auger spectra of HCl
  • 1996
  • Ingår i: PHYSICAL REVIEW LETTERS. - : AMER INST PHYSICS. ; 76:17, s. 3100-3103
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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
  •  
25.
  • Mursu, J, et al. (författare)
  • 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
  • Ingår i: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. - 0953-4075. ; 29:19, s. 4387-4399
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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
  •  
26.
  • Osborne, SJ, et al. (författare)
  • The vibrationally resolved C 1 s core photoelectron spectra of methane and ethane
  • 1997
  • Ingår i: JOURNAL OF CHEMICAL PHYSICS. - : AMER INST PHYSICS. - 0021-9606. ; 106:5, s. 1661-1668
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Recent progress in the development of high-resolution electron spectrometers in combination with highly monochromatized undulator radiation has allowed observation of the vibrationally resolved gas-phase C Is photoelectron spectra of methane and ethane. F
  •  
27.
  •  
28.
  • Patanen, M., et al. (författare)
  • 4f photoionization and subsequent Auger decay in atomic Pb: Relativistic effects
  • 2011
  • Ingår i: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 83:5
  • Tidskriftsartikel (refereegranskat)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.
  •  
29.
  • Saethre, LJ, et al. (författare)
  • High-resolution C 1s photoelectron spectra of methane, ethene, propene, and 2-methylpropene
  • 1997
  • Ingår i: PHYSICAL REVIEW A. - : AMER INST PHYSICS. - 1050-2947. ; 55:4, s. 2748-2756
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Vibrational fine structure in the C Is photoelectron spectra of methane, ethene, propene, and 2-methylpropene has been observed using high-resolution synchrotron radiation. The degree of vibrational excitation is found to increase with the number of hydro
  •  
30.
  • SAIRANEN, OP, et al. (författare)
  • THE RESONANCE AUGER DECAY OF THE XE 4D(3/2,5/2)(-1)NP, N=7,8 STATES STUDIED BY HIGH-RESOLUTION EXPERIMENT
  • 1995
  • Ingår i: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. - 0953-4075. ; 28:20, s. 4509-4528
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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
  •  
31.
  • Schulz, J., et al. (författare)
  • 5p photoemission from laser excited cesium atoms
  • 2006
  • Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 73:6
  • Tidskriftsartikel (refereegranskat)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.
  •  
32.
  •  
33.
  • SVENSSON, S, et al. (författare)
  • FAST DISSOCIATION OF NEUTRAL DOUBLY-EXCITED STATES ABOVE THE S-2P IONIZATION THRESHOLD IN H2S
  • 1995
  • Ingår i: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. ; 28:10
  • Annan publikation (övrigt vetenskapligt/konstnärligt)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
  •  
34.
  •  
35.
  • Tchaplyguine, Maxim, et al. (författare)
  • Size-dependent evolution of electronic structure in neutral Pb clusters-As seen by synchrotron-based X-ray photoelectron spectroscopy
  • 2014
  • Ingår i: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048 .- 1873-2526. ; 195, s. 55-61
  • Tidskriftsartikel (refereegranskat)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.
  •  
36.
  • Thiagarajan, Balasubramanian, et al. (författare)
  • The Normal Incidence Monochromator Beamline I3 on MAX III
  • 2010
  • Ingår i: AIP Conference Proceedings. - : AIP. - 1551-7616 .- 0094-243X. ; 1234, s. 661-664
  • Konferensbidrag (refereegranskat)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.
  •  
37.
  • Urpelainen, S., et al. (författare)
  • FINEST:A high performance branch-line for VUV photon energy range gas phase studies at MAX-lab
  • 2010
  • Ingår i: AIP Conference Proceedings. - : AIP. - 0094-243X. - 9780735407824 ; 1234, s. 411-414
  • Konferensbidrag (refereegranskat)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.
  •  
38.
  • Urpelainen, S., et al. (författare)
  • Valence photoionization and the following fragmentation pathways in Sb-4 clusters
  • 2009
  • Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 80:4, s. 043201-
  • Tidskriftsartikel (refereegranskat)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.
  •  
39.
  • Aksela, S., et al. (författare)
  • Accurate free atom-solid binding energy shifts for Au and Ag
  • 2012
  • Ingår i: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048. ; 185:8-9, s. 273-277
  • Tidskriftsartikel (refereegranskat)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.
  •  
40.
  •  
41.
  • Aksela, S., et al. (författare)
  • Study of different SX-700 monochromator designs for the undulator beamline (BL51) at MAX-lab
  • 1992
  • Ingår i: Review of Scientific Instruments. - : AIP Publishing. - 0034-6748 .- 1089-7623. ; 63:1, s. 1252-1255
  • Tidskriftsartikel (refereegranskat)abstract
    • Different designs of the SX-700 plane grating monochromator have been investigated for the undulator beamline (51) by using analytical considerations and carrying out ray tracing calculations. The most important modifications of the original design are those where the ellipsoidal focusing mirror has been replaced by a plane elliptical or by a spherical mirror. A significant advantage of the spherical mirror is essentially better figure accuracies (±0.2 arcsec). This is partly compensated by the introduced coma aberration which, however, can be made small with rather long exit arm lengths (5-6 m). If the slope errors of the plane elliptical mirror can be made as small as 0.5 arcsec, the differences in the ultimate resolution are small between the plane elliptical and spherical designs and then the source size is the main factor.
  •  
42.
  • Holappa, M., et al. (författare)
  • Atom-solid binding energy shifts for K 2p and Rb 3d sublevels
  • 2011
  • Ingår i: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048. ; 184:7, s. 371-374
  • Tidskriftsartikel (refereegranskat)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.
  •  
43.
  • Kikas, A, et al. (författare)
  • High-resolution study of the correlation satellites in photoelectron spectra of the rare gases
  • 1996
  • Ingår i: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. - 0368-2048. ; 77:3, s. 241-266
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • High-resolution, synchrotron radiation excited valence photoelectron satellite spectra, taken at the magic angle, of all the rare gases, He, Ne, Ar, Kr and Xe, are presented. The facilities at the Finnish beam line at the MAX laboratory have been used to
  •  
44.
  • Niskanen, Johannes, et al. (författare)
  • Valence photoionization of the LiCl monomer and dimer
  • 2010
  • Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 81:4, s. 043401-
  • Tidskriftsartikel (refereegranskat)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.
  •  
45.
  • Osmekhin, S., et al. (författare)
  • Size-dependent transformation of energy structure in free tin clusters studied by photoelectron spectroscopy
  • 2010
  • Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 81:2, s. 023203-
  • Tidskriftsartikel (refereegranskat)abstract
    • Free nanoscale tin clusters in the average size range of a few tens up to similar to 500 atoms are studied by means of valence and core-level photoelectron spectroscopy. A self-consistent picture arises from comparison of the work functions derived from the 4d core-level spectra, the experimental ionization energies extracted from the 5p valence spectra, and the expectations from the metallic sphere model for the clusters. The present studies demonstrate that the 4d core-level energy changes are a sensitive probe of the metal-to-semiconductor transition in the size range under investigation.
  •  
46.
  • Patanen, M., et al. (författare)
  • High-resolution study of K 3p photoabsorption and resonant Auger decay in KF
  • 2009
  • Ingår i: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 80:1
  • Tidskriftsartikel (refereegranskat)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.
  •  
47.
  • Patanen, M., et al. (författare)
  • Strong molecular field effects in Auger decay of the potassium 2p core-hole state in molecular KCl, KBr and KI
  • 2008
  • Ingår i: Journal of Physics B: Atomic, Molecular and Optical Physics. - : IOP Publishing. - 0953-4075 .- 1361-6455. ; 41:21
  • Tidskriftsartikel (refereegranskat)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.
  •  
48.
  • Patanen, M., et al. (författare)
  • Valence photoionization and photoelectron-photoion coincidence (PEPICO) study of molecular LiCl and Li2Cl2
  • 2012
  • Ingår i: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048. ; 185:8-9, s. 285-293
  • Tidskriftsartikel (refereegranskat)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.
  •  
49.
  •  
50.
  • Andersson, Åke, et al. (författare)
  • Experiences with the narrow gap undulator at MAX-lab
  • 1995
  • Ingår i: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. - : Elsevier BV. - 0167-5087 .- 0168-9002. ; 362:2-3, s. 586-591
  • Tidskriftsartikel (refereegranskat)abstract
    • An undulator with short poles (period 24 mm) and extremely narrow gap (magnet gap 7.7 mm) using a squeezable vacuum chamber has been installed and is in operation at the MAX-lab 550 MeV storage ring. The device operates with a vacuum chamber aperture down to 6.2 mm. The behaviour of the storage ring concerning lifetime, emittance, tune shift and closed orbit is well described by conventional models. We present here the design of the device, the influence on the storage ring and the spectral characteristics, as well as comparison with expected theoretical results and an overview of the activities at the beam line.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-50 av 55

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy