Zobrazeno 1 - 10
of 544
pro vyhledávání: '"Lundberg, H."'
Autor:
Rhodin, A. Pehlivan, Belmonte, M. T., Engstrom, L., Lundberg, H., Nilsson, H., Hartman, H., Pickering, J. C., Clear, C., Quinet, P., Fivet, V., Palmeri, P.
The lifetimes of 17 even-parity levels (3d5s, 3d4d, 3d6s, and 4p$^2$) in the region 57743-77837 cm$^{-1}$ of singly ionised scandium (\ion{Sc}{ii}) were measured by two-step time-resolved laser induced fluorescence spectroscopy. Oscillator strengths
Externí odkaz:
http://arxiv.org/abs/1708.06692
Autor:
Hartman, H., Engstrom, L., Lundberg, H., Nilsson, H., Quinet, P., Fivet, V., Palmeri, P., Malcheva, G., Blagoev, K.
Publikováno v:
A&A 600, A108 (2017)
This work reports new experimental radiative lifetimes and calculated oscillator strengths for transitions from 3d8 4d levels of astrophysical interest in singly ionized nickel. Radiative lifetimes of seven high-lying levels of even parity in Ni II (
Externí odkaz:
http://arxiv.org/abs/1701.02480
Publikováno v:
MNRAS 462, 3912 (2016)
This work reports new experimental radiative lifetimes and calculated oscillator strengths for transitions of astrophysical interest in singly ionized cobalt. More precisely, nineteen radiative lifetimes in Co+ have been measured with the time-resolv
Externí odkaz:
http://arxiv.org/abs/1609.02183
Publikováno v:
A&A 584, A24 (2015)
We report lifetime measurements of the 6 levels in the 3d6(5D)4d e6G term in Fe ii at an energy of 10.4 eV, and f -values for 14 transitions from the investigated levels. The lifetimes were measured using time-resolved laser-induced fluorescence on i
Externí odkaz:
http://arxiv.org/abs/1509.06155
Autor:
Gurell, J., Nilsson, H., Engstrom, L., Lundberg, H., Blackwell-Whitehead, R., Nielsen, K. E., Mannervik, S.
Aims: We measure transition probabilities for Cr II transitions from the z ^4H_J, z ^2D_J, y ^4F_J, and y ^4G_J levels in the energy range 63000 to 68000 cm^{-1}. Methods: Radiative lifetimes were measured using time-resolved laser-induced fluorescen
Externí odkaz:
http://arxiv.org/abs/1001.2139
Autor:
Hartman, H., Gurell, J., Lundin, P., Schef, P., Hibbert, A., Lundberg, H., Mannervik, S., Norlin, L. -O., Royen, P.
Context. In many plasmas, long-lived metastable atomic levels are depopulated by collisions (quenched) before they decay radiatively. In low-density regions, however, the low collision rate may allow depopulation by electric dipole (E1) forbidden rad
Externí odkaz:
http://arxiv.org/abs/0803.0828
Autor:
Blackwell-Whitehead, R. J., Lundberg, H., Nave, G., Pickering, J. C., Jones, H. R. A., Lyubchik, Y., Pavlenko, Y. V., Viti, S.
Publikováno v:
Mon.Not.Roy.Astron.Soc.373:1603-1609,2006
We report experimental oscillator strengths for 88 Ti I transitions covering the wavelength range 465 to 3892 nm, 67 of which had no previous experimental values. Radiative lifetimes for thirteen energy levels, including the low energy levels 3d2 (3F
Externí odkaz:
http://arxiv.org/abs/astro-ph/0612656
Publikováno v:
Astron.Astrophys. 461 (2007) 767-773
The stellar abundance ratio of Mg/Fe is an important tool in diagnostics of galaxy evolution. In order to make reliable measurements of the Mg abundance of stars, it is necessary to have accurate values for the oscillator strength (f-value) of each o
Externí odkaz:
http://arxiv.org/abs/astro-ph/0610033
Publikováno v:
Astrophys.J. 584 (2003) L107
We have measured the oscillator strength of the Ni I line at 6300.34 \AA, which is known to be blended with the forbidden [O I] $\lambda$6300 line, used for determination of the oxygen abundance in cool stars. We give also wavelengths of the two isot
Externí odkaz:
http://arxiv.org/abs/astro-ph/0301382
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