| 1. |
- Ubachs, W, et al.
(författare)
-
Lifetime measurements on the c '(1)(4)Sigma(+)(u), v=0, 1 and 2 states of molecular nitrogen
- 2001
-
Ingår i: Chemical Physics. - 0301-0104. ; 270:1, s. 215-225
-
Tidskriftsartikel (refereegranskat)abstract
- Excited state lifetimes of c(4)('1)Sigma (+)(u), upsilon = 0-2 states of molecular nitrogen have been determined in a laboratory investigation using a picosecond XUV laser in a pump-probe configuration. For c(4)('1)Sigma (+)(u) upsilon = 0 the lifetime is tau = 740 +/- 50 ps, for the lowest rotational states. For higher rotational states a gradual shift towards tau = 495 ps is found in agreement with previous findings that these states are subject to predissociation. For c(4)(') Sigma (+)(u) upsilon = 1 no J-dependence is found and values for two isotopomers are reported: tau = 240 ps for (NN)-N-14-N-15 = 240 ps for (NN)-N-14-N-15. For c(4)('1)Sigma (+)(u) upsilon = 2 a lifetime for the lowest rotational states (J = 0-3) was derived: tau = 675 +/- 50 ps; for J = 11 a lifetime of tau less than or equal to 120 ps is deduced. All values for the lifetimes including the J-dependences are explained in a model based on Rydberg-valence interaction. (C) 2001 Elsevier Science B.V. All rights reserved.
|
|
| 2. |
- Litzén, Ulf, et al.
(författare)
-
Analysis of the PdII spectrum in the ultraviolet and infrared regions
- 2001
-
Ingår i: Physica Scripta. - 0031-8949. ; 64:1, s. 63-73
-
Tidskriftsartikel (refereegranskat)abstract
- The knowledge of the Pd II spectrum and term system has been extended by means of observations with Fourier transform and high dispersion photographic instruments in the infrared (8100 - 40000 Angstrom) and ultraviolet (1040 - 3100 Angstrom) regions. 320 lines have been classified and measured with high accuracy (+/-0.05-0.003 cm(-1) in the infrared, +/-0.002-0.0005 Angstrom in the ultraviolet). Together with the lines from a previous investigation (Physica Scripta 50, 110 (1994)), 916 Pd II lines are now classified and accurately measured. 56 new levels have been found, making the total number of known Pd II levels equal to 195. The level structure has been interpreted by means of parametric calculations. Fitted parameter values are presented.
|
|
