Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Hans Veenhuizen"'
Autor:
Mattias Eriksson, Hans Veenhuizen, Ulisse Munari, Sveneric Johansson, Glenn M. Wahlgren, Alessandro Siviero
Publikováno v:
Astronomy & Astrophysics. 434:397-404
We present a semi-empirical equation for prediction of the strengths of those N III lines that are generated by the Bowen mechanism and observed in spectra of symbiotic stars. The equation assumes that the Bowen mechanism is the only source populatin
Autor:
J. Rostas, Leif Karlsson, Björn Wannberg, Hans Veenhuizen, Foo-Tim Chau, M. Lundqvist, John H. D. Eland, K. Y. Tam, P. Baltzer
Publikováno v:
The Journal of Chemical Physics. 104:8922-8931
A study of the vibronic structure in the HeI excited photoelectron spectrum of CO2 involving the X 2Pig and A 2Piu ionic states
Autor:
Hans Veenhuizen, Mattias Eriksson
Publikováno v:
Proceedings of the International Astronomical Union. 8:266-266
The possibility of UV lines from Fe II formed in the BLR of NGC 4151 has been examined. As a result Fe II emission has been shown to play an important role for the topology of the 2000 to 3000 Å wavelength region of the NGC 4151 spectra. The Fe II U
Autor:
Leif Karlsson, S. H. Al-Shamma, R. Maripuu, Hans Ågren, Ji Ming Rong, Hans Veenhuizen, Ingrid Reineck, Kai Siegbahn, Wu Nian-Zu
Publikováno v:
Molecular Physics. 48:1255-1267
The HeI excited electron spectrum of phosphine (PH3) has been recorded with high resolution. The 2 A 1 band reveals an extensive vibrational progression in the v 2 bending mode with irregular structure at the low binding energy side due to hindered i
Autor:
Hans Veenhuizen, Ji Ming Rong, Kai Siegbahn, Wu Nian Zu, S. H. Al-Shamma, R. Maripuu, Ingrid Reineck, M. S. Powar, Leif Karlsson
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 27:15-27
The He(I) electron spectra of pyridine and pyridine- d 5 have been recorded. Distinct vibrational progressions are observed in the first and fourth electronic bands and a vibrational analysis is made. The isotopic effect on the vibrational energies i
Autor:
Björn Wannberg, Leif Karlsson, Lars Mattsson, Kai Siegbahn, Karl Erik Norell, Hans Veenhuizen
Publikováno v:
Journal of Physics B: Atomic and Molecular Physics. 17:L259-L264
The photoelectron spectrum of CO2 excited by polarised He I radiation is investigated in the binding energy region 18.0-18.7 eV, using a focusing VUV polariser at an energy resolution of 15 meV (FWHM). Comparison of spectra taken at different polaris
Autor:
Kai Siegbahn, P. Lodin, L. Karlsson, C. Nohre, S.H. Al-Shamma, Hans Veenhuizen, R. Maripuu, Ingrid Reineck
Publikováno v:
Chemical Physics. 78:311-318
The highly-resolved HeI photoelectron spectrum of CO 2 is presented and its vibrational structure studied in detail. In the X 2 Π g ionic state the v 3 antisymmetric mode is found to be excited in double quanta ( v 1- v 2- v 3 = 0. 0. 2) with energy
Autor:
Björn Wannberg, Kai Siegbahn, C. Nohre, Lars Mattsson, Hans Veenhuizen, Karl Erik Norell, Leif Karlsson
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 41:205-223
The He(I) excited and angle-resolved photoelectron spectrum of CO2 is investigated using a focussing VUV-polarizer. High resolution combined with the additional information given by comparing spectra taken at different angles permits detailed analysi
Publikováno v:
Molecular Physics. 45:477-492
The vibronic spectra of the 1 A 1→2 A 1 U.V. photoelectron transitions in NH3 and ND3 are analysed theoretically. Optimum geometry and potential curves are obtained by means of ab initio configuration interaction calculations. A one-dimensional app
Autor:
Ingrid Reineck, Karl Erik Norell, C. Nohre, Hans Veenhuizen, Björn Wannberg, R. Maripuu, Lars Mattsson, Kai Siegbahn, Leif Karlsson
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 34:235-252
The outer valence region in CS 2 has been studied by high-resolution UV photpelectron Spectroscopy. The spectra reveal detailed vibrational structure in the X $ 2 Π g , A $ 2 Π u , B $ 2 Σ + u and C $ 2 Σ + g bands. Some of the fine-structure pea