On the 1S → 1D emission of O by exciting O2 into and beyond the Schumann-Runge continuum in Ar matrices at 15 K
✍ Scribed by Murthy S. Gudipati
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 553 KB
- Volume
- 242
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The excitation spectrum of a stable photoproduct of 0 2 is recorded by monitoring the 1S ~ 1D emission of O in Ar matrices at 15 K between 200 and 100 nm. The time evolution and changes in intensity of the tS ~ 1D emission of O at different excitation energies indicate the presence of a stable species of O in Ar matrices. It is proposed that the stable species which disappears upon warming to 30 K is O(3P). When irradiated at 140 nm the 1S -~ 1D emission intensity of O increases and irradiation at 121 nm results in the bleaching of this emission. Based on the present study and theoretical data, the possibility that this species could be 0 2 in a metastable site or O(1D) in Ar matrices is ruled out.