| Popis: |
Earlier measurements of the Hanle effect in the sensitized fluorescence of sodium vapour have been resumed with improved experimental geometry and over an extended range of the foreign-gas pressure. The results shed some more light upon the interactions which interfere in the production of this effect. The most noteworthy of these interactions appears to be collisional quenching of hyperfine interaction which seldom has been so clearly observed before. The broadening of the resonant D 1 Hanle signal is also measured and hence cross sections for the desorientation of the state 3 2 P 1 2 are derived. The values of this cross section are in A 2 : 146, 137, 260, 306, 356 for the noble gases He, Ne, Ar, Kr and Xe, respectively. |
