https://doi.org/10.1007/s100530050031
Energy transfer studies in krypton-xenon mixtures excited in a cooled DC discharge
1
Vavilov State Optical Institute, Birzhevaja Line 12, St. Petersburg, 199034
Russia
2
Uppsala University, Department of Physics, Box 530, 751 21 Uppsala, Sweden
Received:
12
May
1999
Revised:
27
August
1999
Published online: 15 February 2000
The VUV spectrum of gaseous mixtures of krypton with a small amount of xenon
added was investigated in the range 115-200 nm. The mixtures were excited in a
capillary DC discharge where the capillary could be cooled by using liquid
nitrogen. The mixed molecule band around the XeI resonance line at
nm
and the mixed molecule continuum to the long wavelength side from the line were
analysed. The band around nm was identified as transitions between a
weakly bound excited state and the weakly bound ground state of XeKr molecules.
When cooling the capillary wall, the appearance of the Xe2 continuum was
observed. The effect is ascribed to energy transfer between molecular states as
a consequence of radiation trapping in the band around nm. The role of
the mixed molecule in the formation of the VUV spectrum of the gas mixture is
discussed and underlined.
PACS: 33.20.Ni – Vacuum ultraviolet spectra / 33.50.Hv – Radiationless transitions, quenching
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
