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24 results on '"Aksela, H"'

1. Theory and ab initio calculations of 2p photoabsorption spectra: The lowest Rydberg resonances in HCl

Author

Fink, RF, Kivilompolo, M, Aksela, H, Fink, RF, Kivilompolo, M, and Aksela, H

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, Addresses: Fink RF, Univ Uppsala, Dept Phys, Box 530, S-75121 Uppsala, Sweden. Ruhr Univ Bochum, D-44780 Bochum, Germany. Univ Oulu, Dept Phys Sci, FIN-90401 Oulu, Finland.

Published
1999

2. The character of the Xe 4p -> nl resonances studied with the aid of their Auger decay

Author

Aksela, H, Huttula, SM, Jurvansuu, M, Mursu, J, Kivilompolo, M, Kivimaki, A, Aksela, S, Svensson, S, Aksela, H, Huttula, SM, Jurvansuu, M, Mursu, J, Kivilompolo, M, Kivimaki, A, Aksela, S, and Svensson, S

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, Addresses: Aksela H, Univ Oulu, Dept Phys Sci, FIN-90570 Oulu, Finland. Univ Oulu, Dept Phys Sci, FIN-90570 Oulu, Finland. Univ Uppsala, Dept Phys, S-75121 Uppsala, Sweden.

Published
1998

3. The character of the Xe 4p -> nl resonances studied with the aid of their Auger decay

Author

Aksela, H, Huttula, SM, Jurvansuu, M, Mursu, J, Kivilompolo, M, Kivimaki, A, Aksela, S, Svensson, S, Aksela, H, Huttula, SM, Jurvansuu, M, Mursu, J, Kivilompolo, M, Kivimaki, A, Aksela, S, and Svensson, S

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, Addresses: Aksela H, Univ Oulu, Dept Phys Sci, FIN-90570 Oulu, Finland. Univ Oulu, Dept Phys Sci, FIN-90570 Oulu, Finland. Univ Uppsala, Dept Phys, S-75121 Uppsala, Sweden.

Published
1998

4. Fast dissociation of resonantly core excited H2S studied by vibrational and temporal analysis of the Auger spectra

Author

deBrito, AN, Bjorneholm, O, Neto, JS, Machado, AB, Svensson, S, Ausmees, A, Osborne, SJ, Saethre, LJ, Aksela, H, Sairanen, OP, Kivimaki, A, Nommiste, E, Aksela, S, deBrito, AN, Bjorneholm, O, Neto, JS, Machado, AB, Svensson, S, Ausmees, A, Osborne, SJ, Saethre, LJ, Aksela, H, Sairanen, OP, Kivimaki, A, Nommiste, E, and Aksela, S

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, Addresses: deBrito AN, UPPSALA UNIV, DEPT PHYS, BOX 530, S-75221 UPPSALA, SWEDEN. UNIV BRASILIA, DEPT PHYS, BR-70910900 BRASILIA, DF, BRAZIL. UNIV BERGEN, DEPT CHEM, N-5007 BERGEN, NORWAY. UNIV OULU, DEPT PHYS SCI, FIN-90570 OULU, FINLAND.

Published
1997

5. Auger decay of the molecular field split S 2p core excited states in HS radical

Author

deBrito, AN, Svensson, S, Osborne, SJ, Ausmees, A, Kivimaki, A, Sairanen, OP, Nommiste, E, Aksela, H, Saethre, LJ, deBrito, AN, Svensson, S, Osborne, SJ, Ausmees, A, Kivimaki, A, Sairanen, OP, Nommiste, E, Aksela, H, and Saethre, LJ

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, Addresses: LUND UNIV, MAX LAB, FINNISH SYNCHROTRON RADIAT FACIL, S-22100 LUND, SWEDEN. UNIV UPPSALA, DEPT PHYS, S-75121 UPPSALA, SWEDEN. UNIV BERGEN, DEPT CHEM, N-5007 BERGEN, NORWAY. ESTONIAN ACAD SCI, INST PHYS, EE-2400 TARTU, ESTONIA.

Published
1997

6. Decay of the 2p(5)4s, 2p(5)3d and 2p(5)4d states of Ar studied by utilizing the Auger resonant Raman effect

Author

Mursu, J, Aksela, H, Sairanen, OP, Kivimaki, A, Nommiste, E, Ausmees, A, Svensson, S, Aksela, S, Mursu, J, Aksela, H, Sairanen, OP, Kivimaki, A, Nommiste, E, Ausmees, A, Svensson, S, and Aksela, S

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, Addresses: Mursu J, UNIV OULU, DEPT PHYS, FIN-90570 OULU, FINLAND. MAX LAB, FINNISH SYNCHROTRON RADIAT FACIL, S-22100 LUND, SWEDEN. UNIV UPPSALA, DEPT PHYS, S-75121 UPPSALA, SWEDEN.

Published
1996

7. Theory of Auger spectra for molecular-field-split core levels

Author

Gelmukhanov, F, Agren, H, Svensson, S, Aksela, H, Aksela, S, Gelmukhanov, F, Agren, H, Svensson, S, Aksela, H, and Aksela, S

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., Addresses: Gelmukhanov F, LINKOPING UNIV, DEPT PHYS & MEASUREMENT TECHNOL, S-58183 LINKOPING, SWEDEN. UNIV UPPSALA, INST PHYS, S-75121 UPPSALA, SWEDEN. UNIV OULU, DEPT NAT SCI, SF-90570 OULU, FINLAND.

Published
1996

8. Auger decay of the dissociating core-excited states in the HCl and DCl molecules

Author

Kukk, E, Aksela, H, Sairanen, OP, Aksela, S, Kivimaki, A, Nommiste, E, Ausmees, A, Kikas, A, Osborne, SJ, Svensson, S, Kukk, E, Aksela, H, Sairanen, OP, Aksela, S, Kivimaki, A, Nommiste, E, Ausmees, A, Kikas, A, Osborne, SJ, and Svensson, S

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, Addresses: Kukk E, UNIV OULU, DEPT PHYS SCI, SF-90570 OULU, FINLAND. UNIV UPPSALA, DEPT PHYS, S-75121 UPPSALA, SWEDEN. ESTONIAN ACAD SCI, INST PHYS, TARTU 2400, ESTONIA.

Published
1996

9. Raman versus non-Raman behavior in resonant auger spectra of HCl

Author

Kukk, E, Aksela, H, Aksela, S, Gelmukhanov, F, Agren, H, Svensson, S, Kukk, E, Aksela, H, Aksela, S, Gelmukhanov, F, Agren, H, and Svensson, S

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, Addresses: Kukk E, UNIV OULU, DEPT PHYS SCI, SF-90570 OULU, FINLAND. LINKOPING UNIV, INST PHYS & MEASUREMENT TECHNOL, S-58183 LINKOPING, SWEDEN. UNIV UPPSALA, DEPT PHYS, S-75121 UPPSALA, SWEDEN.

Published
1996

10. 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

Author

Aksela, H, Jauhiainen, J, Nommiste, E, Aksela, S, Sundin, S, Ausmees, A, Svensson, S, Aksela, H, Jauhiainen, J, Nommiste, E, Aksela, S, Sundin, S, Ausmees, A, and Svensson, S

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, Addresses: Aksela H, UNIV OULU, DEPT PHYS SCI, FIN-90570 OULU, FINLAND. UNIV UPPSALA, DEPT PHYS, S-75125 UPPSALA, SWEDEN.

Published
1996

11. Core-to-Rydberg excitations and their Auger decay in the HCl and DCl molecules

Author

Kukk, E, Aksela, H, Sairanen, OP, Nommiste, E, Aksela, S, Osborne, SJ, Ausmees, A, Svensson, S, Kukk, E, Aksela, H, Sairanen, OP, Nommiste, E, Aksela, S, Osborne, SJ, Ausmees, A, and Svensson, S

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, Addresses: Kukk E, UNIV OULU, DEPT PHYS SCI, FIN-90570 OULU, FINLAND. UNIV UPPSALA, DEPT PHYS, S-75121 UPPSALA, SWEDEN.

Published
1996

12. Auger decay of the dissociating core-excited states in the HCl and DCl molecules

Author

Kukk, E, Aksela, H, Sairanen, OP, Aksela, S, Kivimaki, A, Nommiste, E, Ausmees, A, Kikas, A, Osborne, SJ, Svensson, S, Kukk, E, Aksela, H, Sairanen, OP, Aksela, S, Kivimaki, A, Nommiste, E, Ausmees, A, Kikas, A, Osborne, SJ, and Svensson, S

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, Addresses: Kukk E, UNIV OULU, DEPT PHYS SCI, SF-90570 OULU, FINLAND. UNIV UPPSALA, DEPT PHYS, S-75121 UPPSALA, SWEDEN. ESTONIAN ACAD SCI, INST PHYS, TARTU 2400, ESTONIA.

Published
1996

13. Theory of Auger spectra for molecular-field-split core levels

Author

Gelmukhanov, F, Agren, H, Svensson, S, Aksela, H, Aksela, S, Gelmukhanov, F, Agren, H, Svensson, S, Aksela, H, and Aksela, S

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., Addresses: Gelmukhanov F, LINKOPING UNIV, DEPT PHYS & MEASUREMENT TECHNOL, S-58183 LINKOPING, SWEDEN. UNIV UPPSALA, INST PHYS, S-75121 UPPSALA, SWEDEN. UNIV OULU, DEPT NAT SCI, SF-90570 OULU, FINLAND.

Published
1996

14. THE VIBRATIONALLY RESOLVED PARTICIPATOR AUGER-SPECTRA OF SELECTIVELY EXCITED C-1S(2-SIGMA(-1))2-PI(1) VIBRATIONAL-STATES IN CARBON-MONOXIDE

Author

OSBORNE, SJ, AUSMEES, A, SVENSSON, S, KIVIMAKI, A, SAIRANEN, OP, DEBRITO, AN, AKSELA, H, AKSELA, S, OSBORNE, SJ, AUSMEES, A, SVENSSON, S, KIVIMAKI, A, SAIRANEN, OP, DEBRITO, AN, AKSELA, H, and AKSELA, S

Abstract

Addresses: OSBORNE SJ, UNIV UPPSALA, DEPT PHYS, BOX 530, S-75121 UPPSALA, SWEDEN. UNIV OULU, DEPT PHYS, SF-90570 OULU, FINLAND. ESTONIAN ACAD SCI, INST PHYS, TARTU 2400, ESTONIA.

Published
1995

15. OBSERVATION OF ANOMALOUS BEHAVIOR OF THE XE 4D PHOTOELECTRON SATELLITES

Author

AUSMEES, A, OSBORNE, SJ, SVENSSON, S, DEBRITO, AN, SAIRANEN, OP, KIVIMAKI, A, NOMMISTE, E, AKSELA, H, AKSELA, S, AUSMEES, A, OSBORNE, SJ, SVENSSON, S, DEBRITO, AN, SAIRANEN, OP, KIVIMAKI, A, NOMMISTE, E, AKSELA, H, and AKSELA, S

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, Addresses: AUSMEES A, UNIV UPPSALA, DEPT PHYS, BOX 530, S-75121 UPPSALA, SWEDEN. UNIV OULU, DEPT PHYS SCI, SF-90570 OULU, FINLAND. LUND UNIV, MAX LAB, FINNISH SYNCHROTRON RADIAT FACIL, LUND, SWEDEN.

Published
1995

16. PARTIAL AUGER DECAY-RATES OF CORE-IONIZED MOLECULAR-STATES IN HCL AND DCL

Author

AKSELA, H, KUKK, E, AKSELA, S, SAIRANEN, OP, KIVIMAKI, A, NOMMISTE, E, AUSMEES, A, OSBORNE, SJ, SVENSSON, S, AKSELA, H, KUKK, E, AKSELA, S, SAIRANEN, OP, KIVIMAKI, A, NOMMISTE, E, AUSMEES, A, OSBORNE, SJ, and SVENSSON, S

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, Addresses: AKSELA H, UNIV OULU, DEPT PHYS SCI, SF-90570 OULU, FINLAND. LUND UNIV, MAX LAB, FINNISH SYNCHROTRON RADIAT FACIL, LUND, SWEDEN. UNIV UPPSALA, DEPT PHYS, S-75121 UPPSALA, SWEDEN. ESTONIAN ACAD SCI, INST PHYS, TARTU 2400, ESTONIA.

Published
1995

17. FAST DISSOCIATION OF NEUTRAL DOUBLY-EXCITED STATES ABOVE THE S-2P IONIZATION THRESHOLD IN H2S

Author

SVENSSON, S, AKSELA, H, KIVIMAKI, A, SAIRANEN, OP, AUSMEES, A, OSBORNE, SJ, DEBRITO, AN, NOMMISTE, E, BRAY, G, AKSELA, S, SVENSSON, S, AKSELA, H, KIVIMAKI, A, SAIRANEN, OP, AUSMEES, A, OSBORNE, SJ, DEBRITO, AN, NOMMISTE, E, BRAY, G, and AKSELA, S

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, Addresses: SVENSSON S, UNIV UPPSALA, DEPT PHYS, BOX 530, S-75121 UPPSALA, SWEDEN. UNIV OULU, DEPT PHYS, SF-90570 OULU, FINLAND. LUND UNIV, MAX LAB, FINNISH SYNCHROTRON RADIAT FACIL, S-22100 LUND, SWEDEN. ESTONIAN ACAD SCI, INST PHYS, 2400 TARTU, ESTONIA.

Published
1995

19. High resolution core electron spectroscopy of atoms and molecules on the Finnish beamline at the MAX laboratory

Author

Svensson, S, Aksela, H, Aksela, S, Svensson, S, Aksela, H, and Aksela, S

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, Addresses: Svensson S, UNIV UPPSALA, DEPT PHYS, BOX 530, S-75121 UPPSALA, SWEDEN. UNIV OULU, DEPT PHYS SCI, SF-90570 OULU, FINLAND.

Published
1995

20. THE RESONANCE AUGER DECAY OF THE XE 4D(3/2,5/2)(-1)NP, N=7,8 STATES STUDIED BY HIGH-RESOLUTION EXPERIMENT

Author

SAIRANEN, OP, AKSELA, H, AKSELA, S, MURSU, J, KIVIMAKI, A, DEBRITO, AN, NOMMISTE, E, OSBORNE, SJ, AUSMEES, A, SVENSSON, S, SAIRANEN, OP, AKSELA, H, AKSELA, S, MURSU, J, KIVIMAKI, A, DEBRITO, AN, NOMMISTE, E, OSBORNE, SJ, AUSMEES, A, and SVENSSON, S

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, Addresses: SAIRANEN OP, UNIV OULU, DEPT PHYS SCI, SF-90570 OULU, FINLAND. LUND UNIV, MAX LAB, FINNISH SYNCHROTRON RADIAT FACIL, S-22100 LUND, SWEDEN. UNIV UPPSALA, DEPT PHYS, S-75121 UPPSALA, SWEDEN.

Published
1995

21. HIGH-RESOLUTION STUDY OF THE XE 4D(5/2)/4D(3/2) BRANCHING RATIO

Author

AUSMEES, A, OSBORNE, SJ, MOBERG, R, SVENSSON, S, AKSELA, S, SAIRANEN, OP, KIVIMAKI, A, DEBRITO, AN, NOMMISTE, E, JAUHIAINEN, J, AKSELA, H, AUSMEES, A, OSBORNE, SJ, MOBERG, R, SVENSSON, S, AKSELA, S, SAIRANEN, OP, KIVIMAKI, A, DEBRITO, AN, NOMMISTE, E, JAUHIAINEN, J, and AKSELA, H

Abstract

Addresses: AUSMEES A, UNIV UPPSALA, DEPT PHYS, BOX 530, S-75121 UPPSALA, SWEDEN. UNIV OULU, DEPT PHYS, SF-90570 OULU, FINLAND. LUND UNIV, MAX LAB, FINNISH SYNCHROTRON RADIAT FACIL, LUND, SWEDEN.

Published
1995

22. 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

Author

AKSELA, H, SAIRANEN, OP, AKSELA, S, KIVIMAKI, A, DEBRITO, AN, NOMMISTE, E, TULKKI, J, AUSMEES, A, OSBORNE, SJ, SVENSSON, S, AKSELA, H, SAIRANEN, OP, AKSELA, S, KIVIMAKI, A, DEBRITO, AN, NOMMISTE, E, TULKKI, J, AUSMEES, A, OSBORNE, SJ, and SVENSSON, S

Abstract

Addresses: AKSELA H, UNIV OULU, DEPT PHYS, SF-90570 OULU, FINLAND. LUND UNIV, MAX LAB, FINNISH SYNCHROTRON RADIAT FACIL, S-22100 LUND, SWEDEN. HELSINKI UNIV TECHNOL, OPTOELECTR LABS, SF-02150 ESPOO, FINLAND. UPPSALA UNIV, DEPT PHYS, S-75121 UPPSALA, SWEDE

Published
1995

23. THE VIBRATIONALLY RESOLVED PARTICIPATOR AUGER-SPECTRA OF SELECTIVELY EXCITED C-1S(2-SIGMA(-1))2-PI(1) VIBRATIONAL-STATES IN CARBON-MONOXIDE

Author

OSBORNE, SJ, AUSMEES, A, SVENSSON, S, KIVIMAKI, A, SAIRANEN, OP, DEBRITO, AN, AKSELA, H, AKSELA, S, OSBORNE, SJ, AUSMEES, A, SVENSSON, S, KIVIMAKI, A, SAIRANEN, OP, DEBRITO, AN, AKSELA, H, and AKSELA, S

Abstract

Addresses: OSBORNE SJ, UNIV UPPSALA, DEPT PHYS, BOX 530, S-75121 UPPSALA, SWEDEN. UNIV OULU, DEPT PHYS, SF-90570 OULU, FINLAND. ESTONIAN ACAD SCI, INST PHYS, TARTU 2400, ESTONIA.

Published
1995

24. HIGH-RESOLUTION STUDY OF THE XE 4D(5/2)/4D(3/2) BRANCHING RATIO

Author

AUSMEES, A, OSBORNE, SJ, MOBERG, R, SVENSSON, S, AKSELA, S, SAIRANEN, OP, KIVIMAKI, A, DEBRITO, AN, NOMMISTE, E, JAUHIAINEN, J, AKSELA, H, AUSMEES, A, OSBORNE, SJ, MOBERG, R, SVENSSON, S, AKSELA, S, SAIRANEN, OP, KIVIMAKI, A, DEBRITO, AN, NOMMISTE, E, JAUHIAINEN, J, and AKSELA, H

Abstract

Addresses: AUSMEES A, UNIV UPPSALA, DEPT PHYS, BOX 530, S-75121 UPPSALA, SWEDEN. UNIV OULU, DEPT PHYS, SF-90570 OULU, FINLAND. LUND UNIV, MAX LAB, FINNISH SYNCHROTRON RADIAT FACIL, LUND, SWEDEN.

Published
1995

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