We present accurate results from full CI calculations on ground and excited states ofHL and (H?).' embedded in AgF and RbI solids. It is found that the effect of these crystals on the spectra and on the energy surface characteristics is considerable. This finding suggests that, with a suitable selec
Positro annihilation in organic media and ionic crystals
β Scribed by K.P. Singh; R.M. Singru; C.N.R. Rao
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 258 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The lifetimes of the long-lived components 73 in positron annihilation in organic media are found to depend upon the first ionization potentials of the molecules. In alkali halides 79 is related to the ratio of the volume of the anion to that of the interstitial void.
π SIMILAR VOLUMES
## Abstract The fluorescence quenching under high excitation intensities has been studied in anthracene crystals. The singletβsinglet annihilation constant of (1 Β± 0.5) Γ 10^β8^ cm^3^ s^β1^ is calculated from the quenching of fluorescence induced by a nitrogen 16 ns pulse laser (Ξ» = 3371 Γ ). The ma