Trigonal crystals of K\*ReF, show intense r7 ( 2Tzs) -+r r ( 4AZg) luminescence at 4 and 77 K under 5 14 nm excitation. Extensive vibronic structure is resolved which is dominated by the vibronic origins due to the trigonal components ofthe Ye, vq and Y) modes of the ReFa-ion. The vibrational disper
Xe2Cl and Kr2F excited state (4 2Γ) absorption spectra: measurements of absolute cross sections
✍ Scribed by D.B. Geohegan; J.G. Eden
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 542 KB
- Volume
- 139
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Absolute absorption cross sections for the lowest excited states (4 'I ) of Xe,Cl and Rr2F have been measured at discrete wavelengths in the visible and ultraviolet ( Xe,Cl: 325 6 I < 495 nm; KrZF: 248 Q I Q 570 nm ) The wavelengths observed for the 9 'I +4 'I band peak in each spectrum confirm the predictions of theory. However, the spectral profile and magnitude of the Xe,CI and Kr2F absorption cross sections are considerably different from those predicted theoretically for the corresponding rare gas dimer ions, Xe$ and Kr,+ .
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We apply to two-photon resonant ionization of Cs via resonant dissociative states of Cs2 the technique of transition probability saturation. Our measurements are perfotmed both with linear and circular polarization. Independently of the Cs2 density, they provide the first absolute determination of t