Using modified CNDO/S/CI wavefunctions, the effects of 10, 20, 30 and no CI on the oscillator strength of the TI -c So transition and phosphorescence Lifetim= of pyrazine was investigated. From these caiculations, it was determined that although the individuaI numbers vzried, the order of magnitude
Rotational effects on the S0-T1 oscillator strength of pyrazine
β Scribed by A. Penner; Y. Oreg; E. Villa; E.C. Lim; A. Amirav
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 523 KB
- Volume
- 150
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The rotationally resolved S,+T, transition of jet-cooled pyrazine has been studied using phosphorescence excitation and multiphoton ionization spectroscopy. A computer simulation that divides the relative transition intensity by 2J+ 1 successfully reproduces the experimental spectra. The results are interpreted in terms of a possible spin-rotational-orientational selectivity in the singlet-triplet coupling that governs the transition oscillator strength.
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The current study investigated the effects of 0.4 T rotary non-uniform magnetic field (RMF) exposure on bone density in ovariectomized (OVX) rats. Results showed that many bone indexes are significantly elevated after RMF exposure compared to the control OVX group and confirmed mechanistic evidence
Fluorescence-excitation and quantum-yield spectra were measured along the rotational contours of the O-O and lOa: bands of pyrazme and the O-O band of pyrimidme in the vapor phase at low pressure. A marked variation in quantum yield was observed. The yield spectra for the O-O bands exhiiit a very sh